Reverse geocoding in Swift 4

9

I'm attempting to write a simple method that's fed CLLocationDegrees and returns a CLPlacemark. Looking at Apple's documentation, it seems like a simple task.

Below is what I've dumped into a playground:

import CoreLocation

// this is necessary for async code in a playground

import PlaygroundSupport 



// this is necessary for async code in a playground

PlaygroundPage.current.needsIndefiniteExecution = true



func geocode(latitude: CLLocationDegrees, longitude: CLLocationDegrees) -> CLPlacemark? {

  let location = CLLocation(latitude: latitude, longitude: longitude)

  let geocoder = CLGeocoder()



  var placemark: CLPlacemark?



  geocoder.reverseGeocodeLocation(location) { (placemarks, error) in

    if error != nil {

      print("something went horribly wrong")

    }



    if let placemarks = placemarks {

      placemark = placemarks.first

    }

  }



  return placemark

}



let myPlacemark = geocode(latitude: 37.3318, longitude: 122.0312)

As it stands, my method is returning nil. I'm not sure where my error lies, but I rest assured it's something starlingly stupid on my part. Thank you for reading.

ios swift cllocationmanager

share|improve this question

edited Oct 22 '17 at 1:33

Adrian

asked Oct 22 '17 at 0:30

AdrianAdrian

8,507860129

• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  geocoder.reverseGeocodeLocation is async you would need a completion handler
  
  – Leo Dabus
  Oct 22 '17 at 0:48
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you. I'll see if I can figure it out.
  
  – Adrian
  Oct 22 '17 at 0:53
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I'm trying to pass coordinates that are stored as Doubles in Core Data.
  
  – Adrian
  Oct 22 '17 at 1:18
  

  
  
  
  

add a comment | 

9

I'm attempting to write a simple method that's fed CLLocationDegrees and returns a CLPlacemark. Looking at Apple's documentation, it seems like a simple task.

Below is what I've dumped into a playground:

import CoreLocation

// this is necessary for async code in a playground

import PlaygroundSupport 



// this is necessary for async code in a playground

PlaygroundPage.current.needsIndefiniteExecution = true



func geocode(latitude: CLLocationDegrees, longitude: CLLocationDegrees) -> CLPlacemark? {

  let location = CLLocation(latitude: latitude, longitude: longitude)

  let geocoder = CLGeocoder()



  var placemark: CLPlacemark?



  geocoder.reverseGeocodeLocation(location) { (placemarks, error) in

    if error != nil {

      print("something went horribly wrong")

    }



    if let placemarks = placemarks {

      placemark = placemarks.first

    }

  }



  return placemark

}



let myPlacemark = geocode(latitude: 37.3318, longitude: 122.0312)

As it stands, my method is returning nil. I'm not sure where my error lies, but I rest assured it's something starlingly stupid on my part. Thank you for reading.

ios swift cllocationmanager

share|improve this question

edited Oct 22 '17 at 1:33

Adrian

asked Oct 22 '17 at 0:30

AdrianAdrian

8,507860129

• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  geocoder.reverseGeocodeLocation is async you would need a completion handler
  
  – Leo Dabus
  Oct 22 '17 at 0:48
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you. I'll see if I can figure it out.
  
  – Adrian
  Oct 22 '17 at 0:53
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I'm trying to pass coordinates that are stored as Doubles in Core Data.
  
  – Adrian
  Oct 22 '17 at 1:18
  

  
  
  
  

add a comment | 

9

9

9

6

I'm attempting to write a simple method that's fed CLLocationDegrees and returns a CLPlacemark. Looking at Apple's documentation, it seems like a simple task.

Below is what I've dumped into a playground:

import CoreLocation

// this is necessary for async code in a playground

import PlaygroundSupport 



// this is necessary for async code in a playground

PlaygroundPage.current.needsIndefiniteExecution = true



func geocode(latitude: CLLocationDegrees, longitude: CLLocationDegrees) -> CLPlacemark? {

  let location = CLLocation(latitude: latitude, longitude: longitude)

  let geocoder = CLGeocoder()



  var placemark: CLPlacemark?



  geocoder.reverseGeocodeLocation(location) { (placemarks, error) in

    if error != nil {

      print("something went horribly wrong")

    }



    if let placemarks = placemarks {

      placemark = placemarks.first

    }

  }



  return placemark

}



let myPlacemark = geocode(latitude: 37.3318, longitude: 122.0312)

As it stands, my method is returning nil. I'm not sure where my error lies, but I rest assured it's something starlingly stupid on my part. Thank you for reading.

ios swift cllocationmanager

share|improve this question

edited Oct 22 '17 at 1:33

Adrian

asked Oct 22 '17 at 0:30

AdrianAdrian

8,507860129

I'm attempting to write a simple method that's fed CLLocationDegrees and returns a CLPlacemark. Looking at Apple's documentation, it seems like a simple task.

Below is what I've dumped into a playground:

import CoreLocation

// this is necessary for async code in a playground

import PlaygroundSupport 



// this is necessary for async code in a playground

PlaygroundPage.current.needsIndefiniteExecution = true



func geocode(latitude: CLLocationDegrees, longitude: CLLocationDegrees) -> CLPlacemark? {

  let location = CLLocation(latitude: latitude, longitude: longitude)

  let geocoder = CLGeocoder()



  var placemark: CLPlacemark?



  geocoder.reverseGeocodeLocation(location) { (placemarks, error) in

    if error != nil {

      print("something went horribly wrong")

    }



    if let placemarks = placemarks {

      placemark = placemarks.first

    }

  }



  return placemark

}



let myPlacemark = geocode(latitude: 37.3318, longitude: 122.0312)

As it stands, my method is returning nil. I'm not sure where my error lies, but I rest assured it's something starlingly stupid on my part. Thank you for reading.

ios swift cllocationmanager

ios swift cllocationmanager

share|improve this question

edited Oct 22 '17 at 1:33

Adrian

asked Oct 22 '17 at 0:30

AdrianAdrian

8,507860129

share|improve this question

edited Oct 22 '17 at 1:33

Adrian

asked Oct 22 '17 at 0:30

AdrianAdrian

8,507860129

share|improve this question

share|improve this question

edited Oct 22 '17 at 1:33

Adrian

edited Oct 22 '17 at 1:33

Adrian

edited Oct 22 '17 at 1:33

Adrian

asked Oct 22 '17 at 0:30

AdrianAdrian

8,507860129

asked Oct 22 '17 at 0:30

AdrianAdrian

8,507860129

asked Oct 22 '17 at 0:30

AdrianAdrian

8,507860129

8,507860129

• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  geocoder.reverseGeocodeLocation is async you would need a completion handler
  
  – Leo Dabus
  Oct 22 '17 at 0:48
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you. I'll see if I can figure it out.
  
  – Adrian
  Oct 22 '17 at 0:53
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I'm trying to pass coordinates that are stored as Doubles in Core Data.
  
  – Adrian
  Oct 22 '17 at 1:18
  

  
  
  
  

add a comment | 

• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  geocoder.reverseGeocodeLocation is async you would need a completion handler
  
  – Leo Dabus
  Oct 22 '17 at 0:48
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you. I'll see if I can figure it out.
  
  – Adrian
  Oct 22 '17 at 0:53
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I'm trying to pass coordinates that are stored as Doubles in Core Data.
  
  – Adrian
  Oct 22 '17 at 1:18
  

  
  
  
  

3

3

geocoder.reverseGeocodeLocation is async you would need a completion handler

– Leo Dabus
Oct 22 '17 at 0:48

geocoder.reverseGeocodeLocation is async you would need a completion handler

– Leo Dabus
Oct 22 '17 at 0:48

Thank you. I'll see if I can figure it out.

– Adrian
Oct 22 '17 at 0:53

Thank you. I'll see if I can figure it out.

– Adrian
Oct 22 '17 at 0:53

I'm trying to pass coordinates that are stored as Doubles in Core Data.

– Adrian
Oct 22 '17 at 1:18

I'm trying to pass coordinates that are stored as Doubles in Core Data.

– Adrian
Oct 22 '17 at 1:18

add a comment | 

2 Answers
2

active

oldest

votes

21

import UIKit

import CoreLocation

import PlaygroundSupport

PlaygroundPage.current.needsIndefiniteExecution = true

---

func geocode(latitude: Double, longitude: Double, completion: @escaping (_ placemark: [CLPlacemark]?, _ error: Error?) -> Void)  {

    CLGeocoder().reverseGeocodeLocation(CLLocation(latitude: latitude, longitude: longitude)) { placemark, error in

        guard let placemark = placemark, error == nil else {

            completion(nil, error)

            return

        }

        completion(placemark, nil)

    }

}

or simply:

func geocode(latitude: Double, longitude: Double, completion: @escaping (_ placemark: [CLPlacemark]?, _ error: Error?) -> Void)  {

    CLGeocoder().reverseGeocodeLocation(CLLocation(latitude: latitude, longitude: longitude), completionHandler: completion)

}

or extending CLLocation:

extension CLLocation {

    func geocode(completion: @escaping (_ placemark: [CLPlacemark]?, _ error: Error?) -> Void)  {

        CLGeocoder().reverseGeocodeLocation(self, completionHandler: completion)

    }

}

---

To format your place mark as a mailing address you can use Contacts framework CNPostalAddressFormatter:

import Contacts



extension Formatter {

    static let mailingAddress: CNPostalAddressFormatter = {

        let formatter = CNPostalAddressFormatter()

        formatter.style = .mailingAddress

        return formatter

    }()

}



extension CLPlacemark {

    var mailingAddress: String? {

        return postalAddress?.mailingAddress

    }

}



extension CNPostalAddress {

    var mailingAddress: String {

        return Formatter.mailingAddress.string(from: self)

    }

}

---

placemark

Contains an array of CLPlacemark objects. For most geocoding requests,
this array should contain only one entry. However, forward-geocoding
requests may return multiple placemark objects in situations where the
specified address could not be resolved to a single location. If the
request was canceled or there was an error in obtaining the placemark
information, this parameter is nil.

For more information about the CLPlacemark properties you can check this CLPlacemark

---

Usage:

let location = CLLocation(latitude: -22.963451, longitude: -43.198242)

location.geocode { placemark, error in

    if let error = error as? CLError {

        print("CLError:", error)

        return

    } else if let placemark = placemark?.first {

        // you should always update your UI in the main thread

        DispatchQueue.main.async {

            //  update UI here

            print("name:", placemark.name ?? "unknown")



            print("address1:", placemark.thoroughfare ?? "unknown")

            print("address2:", placemark.subThoroughfare ?? "unknown")

            print("neighborhood:", placemark.subLocality ?? "unknown")

            print("city:", placemark.locality ?? "unknown")



            print("state:", placemark.administrativeArea ?? "unknown")

            print("subAdministrativeArea:", placemark.subAdministrativeArea ?? "unknown")

            print("zip code:", placemark.postalCode ?? "unknown")

            print("country:", placemark.country ?? "unknown", terminator: "nn")



            print("isoCountryCode:", placemark.isoCountryCode ?? "unknown")

            print("region identifier:", placemark.region?.identifier ?? "unknown")



            print("timezone:", placemark.timeZone ?? "unknown", terminator:"nn")



            // Mailind Address

            print(placemark.mailingAddress ?? "unknown")

        }

    }

}

---

This will print

name: Morro da Saudade

address1: Rua Casuarina

address2: 597

neighborhood: Lagoa

city: Rio de Janeiro

state: RJ

subAdministrativeArea: unknown

zip code: 22011-040

country: Brazil



isoCountryCode: BR

region identifier: <-22.96345100,-43.19824200> radius 141.83

timezone: America/Sao_Paulo (current)

Rua Casuarina, 597

Lagoa

Rio de Janeiro RJ

22011-040

Brazil

share|improve this answer

edited Feb 18 at 18:57

answered Oct 22 '17 at 0:57

Leo DabusLeo Dabus

135k32277351

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you! This gets the job done. I don't think I'm going to be able to declare a let constant like this, given it's async code. I'll refactor this let myPlacemark = geocode(latitude: 37.3318, longitude: 122.0312) with something else.
  
  – Adrian
  Oct 22 '17 at 1:25
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  You need to use it inside the closure
  
  – Leo Dabus
  Oct 22 '17 at 1:26
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Perfect. Thank you!
  
  – Adrian
  Oct 22 '17 at 1:29
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  HI, How to get the complete state name?, not in ISO code format.
  
  – Ramakrishna
  Jan 6 '18 at 11:22
  

  
  
  
  

add a comment | 

0

There are so many questions dealing with 'reverseGeocodeLocation' on Stack Overflow, I've seen so many of them. I'm using Swift 4.2 and I thought my 'reverseGeocodeLocation' requests might be timing out. Well, this is NOT the case, when starting to move with an iPhone the 'didUpdateLocations' cycles need to mature. It can take two or more cycles before 'reverseGeocodeLocation' returns placemarks.

I wrote a simple app that uses 'reverseGeocodeLocation' until 'placemarks' are returned after repeated 'didUpdateLocations' cycles. This is my own home grown 'SampleCode'. I learned a lot from using the app, it might help others understand how reverse geocode requests work in the real world.

Please give your comments on possible improvements. This code is freely given and freely taken.

import Foundation

import UIKit

import CoreLocation



class ViewController: UIViewController, CLLocationManagerDelegate {

    @IBAction func RefreshLocationButton(_ sender: Any) {

        self.requestingPlacemark = true

        self.placemarkData = nil

        //^Make another Placemark Request

        self.requestCounter = 0

        self.RequestCounterLabel.text = ""

        self.LocationLabel.text = ""

        self.PlacemarkLabel.text = ""}

    @IBOutlet weak var LocationCounterLabel: UILabel!

    @IBOutlet weak var RequestCounterLabel: UILabel!

    @IBOutlet weak var LocationLabel: UILabel!

    @IBOutlet weak var PlacemarkLabel: UILabel!

    let locationManager = CLLocationManager()

    var placemarkData: CLPlacemark!

    var placemarkString: String!

    var printPlacemarkData: Bool!

    var didUpdateLocationsCounter: Int = 0

    var requestCounter: Int = 0

    var requestingPlacemark: Bool = true



override func viewDidLoad() {

    super.viewDidLoad()

    if CLLocationManager.locationServicesEnabled() {

        locationManager.requestAlwaysAuthorization()

        locationManager.delegate = self

        //locationManager.desiredAccuracy = kCLLocationAccuracyBest

        locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation

        locationManager.startUpdatingLocation()

        self.RequestCounterLabel.text = ""

        self.LocationLabel.text = ""

        self.PlacemarkLabel.text = ""}}

func printPlacemarks() {

    if printPlacemarkData {

        self.placemarkString = "Placemark Data:"

        self.placemarkString = buildPlacemarkString(item: 1)

        self.placemarkString = buildPlacemarkString(item: 2)

        self.placemarkString = buildPlacemarkString(item: 3)

        self.placemarkString = buildPlacemarkString(item: 4)

        self.placemarkString = buildPlacemarkString(item: 5)

        self.placemarkString = buildPlacemarkString(item: 6)

        self.placemarkString = buildPlacemarkString(item: 7)

        self.placemarkString = buildPlacemarkString(item: 8)

        self.placemarkString = buildPlacemarkString(item: 9)

        self.placemarkString = buildPlacemarkString(item: 10)

        self.PlacemarkLabel.text = self.placemarkString

        self.printPlacemarkData = false}}

func buildPlacemarkString(item: Int) -> String {

    var elementText: String!

    var newString: String!

        switch item {

        case 1: elementText = "name: " + self.placemarkData.name!

        case 2: elementText = "subThoroughfare: " + self.placemarkData.subThoroughfare!

        case 3: elementText = "thoroughfare: " + self.placemarkData.thoroughfare!

        case 4: elementText = "postalCode: " + self.placemarkData.postalCode!

        case 5: elementText = "subLocality: " + self.placemarkData.subLocality!

        case 6: elementText = "locality: " + self.placemarkData.locality!

        case 7: elementText = "subAdministrativeArea: " + self.placemarkData.subAdministrativeArea!

        case 8: elementText = "administrativeArea: " + self.placemarkData.administrativeArea!

        case 9: elementText = "country: " + self.placemarkData.country!

        case 10: elementText = "isoCountryCode: " + self.placemarkData.isoCountryCode!

        default: print("Error: incorrect item number!")}

        newString = self.placemarkString + "n" + elementText

    return newString

}

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {

        //location prints one time and 'didUpdateLocations' is stopped:

    self.didUpdateLocationsCounter = self.didUpdateLocationsCounter + 1

    let labelString = String(describing: self.didUpdateLocationsCounter)

    self.LocationCounterLabel.text = "Location Update Counter: " + labelString

    if self.placemarkData == nil {

        //location variable:

        self.requestCounter = self.requestCounter + 1

        let textString = String(describing: self.requestCounter)

        self.RequestCounterLabel.text = "Request Counter: " + textString

        if locations.count == 0 {

            self.LocationLabel.text = "Locations: There was NONE"}

        else {

            if locations.count > 0 {

                let coordinate2D: CLLocation = locations.first!

                let location = CLLocation(latitude: coordinate2D.coordinate.latitude, longitude: coordinate2D.coordinate.longitude)

                let printString = String(describing: location)

                self.LocationLabel.text = "Location: " + printString

                let geocoder: CLGeocoder = CLGeocoder()

                geocoder.reverseGeocodeLocation(location, completionHandler: {(placemarks, error) -> Void in

                    if error != nil {

                        let errorString = String(describing: error?.localizedDescription)

                        print("reverse geodcode fail: (errorString)")

                        self.LocationCounterLabel.text = ""

                        self.RequestCounterLabel.text = ""

                        self.LocationLabel.text = "Reverse Geodcode fail: (errorString)"

                        self.PlacemarkLabel.text = ""

                        self.requestingPlacemark = false

                        return}

                    else {

                        let pm = placemarks! as [CLPlacemark]

                        //There is ALWAYS 'placemarks' Data

                        if pm.count > 0 {

                            self.placemarkData = placemarks![0]

                            self.printPlacemarkData = true

                            self.printPlacemarks()

                            self.requestingPlacemark = false}}})}

            else {

                if self.requestingPlacemark {

                    self.LocationLabel.text = "Problem: There is no 'location.first'"}}}}}}

And then the Storyboard UI:

Storyboard Image

View Controller Image

<?xml version="1.0" encoding="UTF-8"?>

<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="14460.31" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">

    <device id="retina4_7" orientation="portrait">

        <adaptation id="fullscreen"/>

    </device>

    <dependencies>

        <deployment identifier="iOS"/>

        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14460.20"/>

        <capability name="Safe area layout guides" minToolsVersion="9.0"/>

        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>

    </dependencies>

    <scenes>

        <!--View Controller-->

        <scene sceneID="tne-QT-ifu">

            <objects>

                <viewController id="BYZ-38-t0r" customClass="ViewController" customModule="MyThoroughfare" customModuleProvider="target" sceneMemberID="viewController">

                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">

                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>

                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>

                        <subviews>

                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Location Counter" lineBreakMode="tailTruncation" numberOfLines="2" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="ZIg-u9-TMR">

                                <rect key="frame" x="16" y="20" width="343" height="20.5"/>

                                <color key="backgroundColor" red="0.80000001190000003" green="0.80000001190000003" blue="0.80000001190000003" alpha="1" colorSpace="calibratedRGB"/>

                                <fontDescription key="fontDescription" type="system" pointSize="17"/>

                                <nil key="textColor"/>

                                <nil key="highlightedColor"/>

                            </label>

                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Location Count Label" lineBreakMode="tailTruncation" numberOfLines="2" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="csF-KS-xGE">

                                <rect key="frame" x="16" y="48" width="343" height="20.5"/>

                                <color key="backgroundColor" red="0.80000001190000003" green="0.80000001190000003" blue="0.80000001190000003" alpha="1" colorSpace="calibratedRGB"/>

                                <fontDescription key="fontDescription" type="system" pointSize="17"/>

                                <nil key="textColor"/>

                                <nil key="highlightedColor"/>

                            </label>

                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Location String" lineBreakMode="tailTruncation" numberOfLines="8" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="qOc-gk-gSp">

                                <rect key="frame" x="16" y="76" width="343" height="20.5"/>

                                <color key="backgroundColor" red="0.80000001190000003" green="0.80000001190000003" blue="0.80000001190000003" alpha="1" colorSpace="calibratedRGB"/>

                                <fontDescription key="fontDescription" type="system" pointSize="17"/>

                                <nil key="textColor"/>

                                <nil key="highlightedColor"/>

                            </label>

                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Placemark String" lineBreakMode="tailTruncation" numberOfLines="14" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="42A-nO-tNf">

                                <rect key="frame" x="16" y="104" width="343" height="20.5"/>

                                <color key="backgroundColor" red="0.80000001190000003" green="0.80000001190000003" blue="0.80000001190000003" alpha="1" colorSpace="calibratedRGB"/>

                                <fontDescription key="fontDescription" type="system" pointSize="17"/>

                                <nil key="textColor"/>

                                <nil key="highlightedColor"/>

                            </label>

                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="HgN-oB-ds0">

                                <rect key="frame" x="121.5" y="578" width="132" height="30"/>

                                <state key="normal" title="Request Placemark"/>

                                <connections>

                                    <action selector="RefreshLocationButton:" destination="BYZ-38-t0r" eventType="touchUpInside" id="izY-S5-wjg"/>

                                </connections>

                            </button>

                        </subviews>

                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>

                        <constraints>

                            <constraint firstItem="ZIg-u9-TMR" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="16" id="6HO-kN-l1z"/>

                            <constraint firstItem="qOc-gk-gSp" firstAttribute="top" secondItem="csF-KS-xGE" secondAttribute="bottom" constant="7.5" id="6ux-dx-gJr"/>

                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="42A-nO-tNf" secondAttribute="trailing" constant="16" id="8dG-gV-Cob"/>

                            <constraint firstItem="HgN-oB-ds0" firstAttribute="centerX" secondItem="8bC-Xf-vdC" secondAttribute="centerX" id="A38-Nt-i3D"/>

                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="ZIg-u9-TMR" secondAttribute="trailing" constant="16" id="Bb0-YC-oov"/>

                            <constraint firstItem="csF-KS-xGE" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="16" id="FJU-ha-HkL"/>

                            <constraint firstItem="42A-nO-tNf" firstAttribute="top" secondItem="qOc-gk-gSp" secondAttribute="bottom" constant="7.5" id="SpR-XB-MLG"/>

                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="bottom" secondItem="HgN-oB-ds0" secondAttribute="bottom" constant="59" id="Vr6-QE-230"/>

                            <constraint firstItem="42A-nO-tNf" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="16" id="aHo-kJ-aCb"/>

                            <constraint firstItem="csF-KS-xGE" firstAttribute="top" secondItem="ZIg-u9-TMR" secondAttribute="bottom" constant="7.5" id="c63-Mq-ItW"/>

                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="csF-KS-xGE" secondAttribute="trailing" constant="16" id="dlV-Hc-8XJ"/>

                            <constraint firstItem="qOc-gk-gSp" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="16" id="m5y-Q8-jxI"/>

                            <constraint firstItem="ZIg-u9-TMR" firstAttribute="top" secondItem="6Tk-OE-BBY" secondAttribute="top" id="sdw-WQ-Bx9"/>

                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="qOc-gk-gSp" secondAttribute="trailing" constant="16" id="woB-ig-i5v"/>

                        </constraints>

                        <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>

                    </view>

                    <connections>

                        <outlet property="LocationCounterLabel" destination="ZIg-u9-TMR" id="K4g-WT-f82"/>

                        <outlet property="LocationLabel" destination="qOc-gk-gSp" id="Cdw-bw-EWt"/>

                        <outlet property="PlacemarkLabel" destination="42A-nO-tNf" id="dMh-bw-cRE"/>

                        <outlet property="RequestCounterLabel" destination="csF-KS-xGE" id="ai6-zn-Toi"/>

                    </connections>

                </viewController>

                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>

            </objects>

            <point key="canvasLocation" x="53.600000000000001" y="66.11694152923539"/>

        </scene>

    </scenes>

</document>

share|improve this answer

edited Jan 1 at 5:25

answered Jan 1 at 0:40

B. WasonB. Wason

145

add a comment | 

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21

import UIKit

import CoreLocation

import PlaygroundSupport

PlaygroundPage.current.needsIndefiniteExecution = true

---

func geocode(latitude: Double, longitude: Double, completion: @escaping (_ placemark: [CLPlacemark]?, _ error: Error?) -> Void)  {

    CLGeocoder().reverseGeocodeLocation(CLLocation(latitude: latitude, longitude: longitude)) { placemark, error in

        guard let placemark = placemark, error == nil else {

            completion(nil, error)

            return

        }

        completion(placemark, nil)

    }

}

or simply:

func geocode(latitude: Double, longitude: Double, completion: @escaping (_ placemark: [CLPlacemark]?, _ error: Error?) -> Void)  {

    CLGeocoder().reverseGeocodeLocation(CLLocation(latitude: latitude, longitude: longitude), completionHandler: completion)

}

or extending CLLocation:

extension CLLocation {

    func geocode(completion: @escaping (_ placemark: [CLPlacemark]?, _ error: Error?) -> Void)  {

        CLGeocoder().reverseGeocodeLocation(self, completionHandler: completion)

    }

}

---

To format your place mark as a mailing address you can use Contacts framework CNPostalAddressFormatter:

import Contacts



extension Formatter {

    static let mailingAddress: CNPostalAddressFormatter = {

        let formatter = CNPostalAddressFormatter()

        formatter.style = .mailingAddress

        return formatter

    }()

}



extension CLPlacemark {

    var mailingAddress: String? {

        return postalAddress?.mailingAddress

    }

}



extension CNPostalAddress {

    var mailingAddress: String {

        return Formatter.mailingAddress.string(from: self)

    }

}

---

placemark

Contains an array of CLPlacemark objects. For most geocoding requests,
this array should contain only one entry. However, forward-geocoding
requests may return multiple placemark objects in situations where the
specified address could not be resolved to a single location. If the
request was canceled or there was an error in obtaining the placemark
information, this parameter is nil.

For more information about the CLPlacemark properties you can check this CLPlacemark

---

Usage:

let location = CLLocation(latitude: -22.963451, longitude: -43.198242)

location.geocode { placemark, error in

    if let error = error as? CLError {

        print("CLError:", error)

        return

    } else if let placemark = placemark?.first {

        // you should always update your UI in the main thread

        DispatchQueue.main.async {

            //  update UI here

            print("name:", placemark.name ?? "unknown")



            print("address1:", placemark.thoroughfare ?? "unknown")

            print("address2:", placemark.subThoroughfare ?? "unknown")

            print("neighborhood:", placemark.subLocality ?? "unknown")

            print("city:", placemark.locality ?? "unknown")



            print("state:", placemark.administrativeArea ?? "unknown")

            print("subAdministrativeArea:", placemark.subAdministrativeArea ?? "unknown")

            print("zip code:", placemark.postalCode ?? "unknown")

            print("country:", placemark.country ?? "unknown", terminator: "nn")



            print("isoCountryCode:", placemark.isoCountryCode ?? "unknown")

            print("region identifier:", placemark.region?.identifier ?? "unknown")



            print("timezone:", placemark.timeZone ?? "unknown", terminator:"nn")



            // Mailind Address

            print(placemark.mailingAddress ?? "unknown")

        }

    }

}

---

This will print

name: Morro da Saudade

address1: Rua Casuarina

address2: 597

neighborhood: Lagoa

city: Rio de Janeiro

state: RJ

subAdministrativeArea: unknown

zip code: 22011-040

country: Brazil



isoCountryCode: BR

region identifier: <-22.96345100,-43.19824200> radius 141.83

timezone: America/Sao_Paulo (current)

Rua Casuarina, 597

Lagoa

Rio de Janeiro RJ

22011-040

Brazil

share|improve this answer

edited Feb 18 at 18:57

answered Oct 22 '17 at 0:57

Leo DabusLeo Dabus

135k32277351

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you! This gets the job done. I don't think I'm going to be able to declare a let constant like this, given it's async code. I'll refactor this let myPlacemark = geocode(latitude: 37.3318, longitude: 122.0312) with something else.
  
  – Adrian
  Oct 22 '17 at 1:25
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  You need to use it inside the closure
  
  – Leo Dabus
  Oct 22 '17 at 1:26
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Perfect. Thank you!
  
  – Adrian
  Oct 22 '17 at 1:29
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  HI, How to get the complete state name?, not in ISO code format.
  
  – Ramakrishna
  Jan 6 '18 at 11:22
  

  
  
  
  

add a comment | 

21

import UIKit

import CoreLocation

import PlaygroundSupport

PlaygroundPage.current.needsIndefiniteExecution = true

---

func geocode(latitude: Double, longitude: Double, completion: @escaping (_ placemark: [CLPlacemark]?, _ error: Error?) -> Void)  {

    CLGeocoder().reverseGeocodeLocation(CLLocation(latitude: latitude, longitude: longitude)) { placemark, error in

        guard let placemark = placemark, error == nil else {

            completion(nil, error)

            return

        }

        completion(placemark, nil)

    }

}

or simply:

func geocode(latitude: Double, longitude: Double, completion: @escaping (_ placemark: [CLPlacemark]?, _ error: Error?) -> Void)  {

    CLGeocoder().reverseGeocodeLocation(CLLocation(latitude: latitude, longitude: longitude), completionHandler: completion)

}

or extending CLLocation:

extension CLLocation {

    func geocode(completion: @escaping (_ placemark: [CLPlacemark]?, _ error: Error?) -> Void)  {

        CLGeocoder().reverseGeocodeLocation(self, completionHandler: completion)

    }

}

---

To format your place mark as a mailing address you can use Contacts framework CNPostalAddressFormatter:

import Contacts



extension Formatter {

    static let mailingAddress: CNPostalAddressFormatter = {

        let formatter = CNPostalAddressFormatter()

        formatter.style = .mailingAddress

        return formatter

    }()

}



extension CLPlacemark {

    var mailingAddress: String? {

        return postalAddress?.mailingAddress

    }

}



extension CNPostalAddress {

    var mailingAddress: String {

        return Formatter.mailingAddress.string(from: self)

    }

}

---

placemark

Contains an array of CLPlacemark objects. For most geocoding requests,
this array should contain only one entry. However, forward-geocoding
requests may return multiple placemark objects in situations where the
specified address could not be resolved to a single location. If the
request was canceled or there was an error in obtaining the placemark
information, this parameter is nil.

For more information about the CLPlacemark properties you can check this CLPlacemark

---

Usage:

let location = CLLocation(latitude: -22.963451, longitude: -43.198242)

location.geocode { placemark, error in

    if let error = error as? CLError {

        print("CLError:", error)

        return

    } else if let placemark = placemark?.first {

        // you should always update your UI in the main thread

        DispatchQueue.main.async {

            //  update UI here

            print("name:", placemark.name ?? "unknown")



            print("address1:", placemark.thoroughfare ?? "unknown")

            print("address2:", placemark.subThoroughfare ?? "unknown")

            print("neighborhood:", placemark.subLocality ?? "unknown")

            print("city:", placemark.locality ?? "unknown")



            print("state:", placemark.administrativeArea ?? "unknown")

            print("subAdministrativeArea:", placemark.subAdministrativeArea ?? "unknown")

            print("zip code:", placemark.postalCode ?? "unknown")

            print("country:", placemark.country ?? "unknown", terminator: "nn")



            print("isoCountryCode:", placemark.isoCountryCode ?? "unknown")

            print("region identifier:", placemark.region?.identifier ?? "unknown")



            print("timezone:", placemark.timeZone ?? "unknown", terminator:"nn")



            // Mailind Address

            print(placemark.mailingAddress ?? "unknown")

        }

    }

}

---

This will print

name: Morro da Saudade

address1: Rua Casuarina

address2: 597

neighborhood: Lagoa

city: Rio de Janeiro

state: RJ

subAdministrativeArea: unknown

zip code: 22011-040

country: Brazil



isoCountryCode: BR

region identifier: <-22.96345100,-43.19824200> radius 141.83

timezone: America/Sao_Paulo (current)

Rua Casuarina, 597

Lagoa

Rio de Janeiro RJ

22011-040

Brazil

share|improve this answer

edited Feb 18 at 18:57

answered Oct 22 '17 at 0:57

Leo DabusLeo Dabus

135k32277351

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you! This gets the job done. I don't think I'm going to be able to declare a let constant like this, given it's async code. I'll refactor this let myPlacemark = geocode(latitude: 37.3318, longitude: 122.0312) with something else.
  
  – Adrian
  Oct 22 '17 at 1:25
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  You need to use it inside the closure
  
  – Leo Dabus
  Oct 22 '17 at 1:26
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Perfect. Thank you!
  
  – Adrian
  Oct 22 '17 at 1:29
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  HI, How to get the complete state name?, not in ISO code format.
  
  – Ramakrishna
  Jan 6 '18 at 11:22
  

  
  
  
  

add a comment | 

21

21

21

import UIKit

import CoreLocation

import PlaygroundSupport

PlaygroundPage.current.needsIndefiniteExecution = true

---

func geocode(latitude: Double, longitude: Double, completion: @escaping (_ placemark: [CLPlacemark]?, _ error: Error?) -> Void)  {

    CLGeocoder().reverseGeocodeLocation(CLLocation(latitude: latitude, longitude: longitude)) { placemark, error in

        guard let placemark = placemark, error == nil else {

            completion(nil, error)

            return

        }

        completion(placemark, nil)

    }

}

or simply:

func geocode(latitude: Double, longitude: Double, completion: @escaping (_ placemark: [CLPlacemark]?, _ error: Error?) -> Void)  {

    CLGeocoder().reverseGeocodeLocation(CLLocation(latitude: latitude, longitude: longitude), completionHandler: completion)

}

or extending CLLocation:

extension CLLocation {

    func geocode(completion: @escaping (_ placemark: [CLPlacemark]?, _ error: Error?) -> Void)  {

        CLGeocoder().reverseGeocodeLocation(self, completionHandler: completion)

    }

}

---

To format your place mark as a mailing address you can use Contacts framework CNPostalAddressFormatter:

import Contacts



extension Formatter {

    static let mailingAddress: CNPostalAddressFormatter = {

        let formatter = CNPostalAddressFormatter()

        formatter.style = .mailingAddress

        return formatter

    }()

}



extension CLPlacemark {

    var mailingAddress: String? {

        return postalAddress?.mailingAddress

    }

}



extension CNPostalAddress {

    var mailingAddress: String {

        return Formatter.mailingAddress.string(from: self)

    }

}

---

placemark

Contains an array of CLPlacemark objects. For most geocoding requests,
this array should contain only one entry. However, forward-geocoding
requests may return multiple placemark objects in situations where the
specified address could not be resolved to a single location. If the
request was canceled or there was an error in obtaining the placemark
information, this parameter is nil.

For more information about the CLPlacemark properties you can check this CLPlacemark

---

Usage:

let location = CLLocation(latitude: -22.963451, longitude: -43.198242)

location.geocode { placemark, error in

    if let error = error as? CLError {

        print("CLError:", error)

        return

    } else if let placemark = placemark?.first {

        // you should always update your UI in the main thread

        DispatchQueue.main.async {

            //  update UI here

            print("name:", placemark.name ?? "unknown")



            print("address1:", placemark.thoroughfare ?? "unknown")

            print("address2:", placemark.subThoroughfare ?? "unknown")

            print("neighborhood:", placemark.subLocality ?? "unknown")

            print("city:", placemark.locality ?? "unknown")



            print("state:", placemark.administrativeArea ?? "unknown")

            print("subAdministrativeArea:", placemark.subAdministrativeArea ?? "unknown")

            print("zip code:", placemark.postalCode ?? "unknown")

            print("country:", placemark.country ?? "unknown", terminator: "nn")



            print("isoCountryCode:", placemark.isoCountryCode ?? "unknown")

            print("region identifier:", placemark.region?.identifier ?? "unknown")



            print("timezone:", placemark.timeZone ?? "unknown", terminator:"nn")



            // Mailind Address

            print(placemark.mailingAddress ?? "unknown")

        }

    }

}

---

This will print

name: Morro da Saudade

address1: Rua Casuarina

address2: 597

neighborhood: Lagoa

city: Rio de Janeiro

state: RJ

subAdministrativeArea: unknown

zip code: 22011-040

country: Brazil



isoCountryCode: BR

region identifier: <-22.96345100,-43.19824200> radius 141.83

timezone: America/Sao_Paulo (current)

Rua Casuarina, 597

Lagoa

Rio de Janeiro RJ

22011-040

Brazil

share|improve this answer

edited Feb 18 at 18:57

answered Oct 22 '17 at 0:57

Leo DabusLeo Dabus

135k32277351

import UIKit

import CoreLocation

import PlaygroundSupport

PlaygroundPage.current.needsIndefiniteExecution = true

---

func geocode(latitude: Double, longitude: Double, completion: @escaping (_ placemark: [CLPlacemark]?, _ error: Error?) -> Void)  {

    CLGeocoder().reverseGeocodeLocation(CLLocation(latitude: latitude, longitude: longitude)) { placemark, error in

        guard let placemark = placemark, error == nil else {

            completion(nil, error)

            return

        }

        completion(placemark, nil)

    }

}

or simply:

func geocode(latitude: Double, longitude: Double, completion: @escaping (_ placemark: [CLPlacemark]?, _ error: Error?) -> Void)  {

    CLGeocoder().reverseGeocodeLocation(CLLocation(latitude: latitude, longitude: longitude), completionHandler: completion)

}

or extending CLLocation:

extension CLLocation {

    func geocode(completion: @escaping (_ placemark: [CLPlacemark]?, _ error: Error?) -> Void)  {

        CLGeocoder().reverseGeocodeLocation(self, completionHandler: completion)

    }

}

---

To format your place mark as a mailing address you can use Contacts framework CNPostalAddressFormatter:

import Contacts



extension Formatter {

    static let mailingAddress: CNPostalAddressFormatter = {

        let formatter = CNPostalAddressFormatter()

        formatter.style = .mailingAddress

        return formatter

    }()

}



extension CLPlacemark {

    var mailingAddress: String? {

        return postalAddress?.mailingAddress

    }

}



extension CNPostalAddress {

    var mailingAddress: String {

        return Formatter.mailingAddress.string(from: self)

    }

}

---

placemark

Contains an array of CLPlacemark objects. For most geocoding requests,
this array should contain only one entry. However, forward-geocoding
requests may return multiple placemark objects in situations where the
specified address could not be resolved to a single location. If the
request was canceled or there was an error in obtaining the placemark
information, this parameter is nil.

For more information about the CLPlacemark properties you can check this CLPlacemark

---

Usage:

let location = CLLocation(latitude: -22.963451, longitude: -43.198242)

location.geocode { placemark, error in

    if let error = error as? CLError {

        print("CLError:", error)

        return

    } else if let placemark = placemark?.first {

        // you should always update your UI in the main thread

        DispatchQueue.main.async {

            //  update UI here

            print("name:", placemark.name ?? "unknown")



            print("address1:", placemark.thoroughfare ?? "unknown")

            print("address2:", placemark.subThoroughfare ?? "unknown")

            print("neighborhood:", placemark.subLocality ?? "unknown")

            print("city:", placemark.locality ?? "unknown")



            print("state:", placemark.administrativeArea ?? "unknown")

            print("subAdministrativeArea:", placemark.subAdministrativeArea ?? "unknown")

            print("zip code:", placemark.postalCode ?? "unknown")

            print("country:", placemark.country ?? "unknown", terminator: "nn")



            print("isoCountryCode:", placemark.isoCountryCode ?? "unknown")

            print("region identifier:", placemark.region?.identifier ?? "unknown")



            print("timezone:", placemark.timeZone ?? "unknown", terminator:"nn")



            // Mailind Address

            print(placemark.mailingAddress ?? "unknown")

        }

    }

}

---

This will print

name: Morro da Saudade

address1: Rua Casuarina

address2: 597

neighborhood: Lagoa

city: Rio de Janeiro

state: RJ

subAdministrativeArea: unknown

zip code: 22011-040

country: Brazil



isoCountryCode: BR

region identifier: <-22.96345100,-43.19824200> radius 141.83

timezone: America/Sao_Paulo (current)

Rua Casuarina, 597

Lagoa

Rio de Janeiro RJ

22011-040

Brazil

share|improve this answer

edited Feb 18 at 18:57

answered Oct 22 '17 at 0:57

Leo DabusLeo Dabus

135k32277351

share|improve this answer

share|improve this answer

edited Feb 18 at 18:57

edited Feb 18 at 18:57

edited Feb 18 at 18:57

answered Oct 22 '17 at 0:57

Leo DabusLeo Dabus

135k32277351

answered Oct 22 '17 at 0:57

Leo DabusLeo Dabus

135k32277351

answered Oct 22 '17 at 0:57

Leo DabusLeo Dabus

135k32277351

135k32277351

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you! This gets the job done. I don't think I'm going to be able to declare a let constant like this, given it's async code. I'll refactor this let myPlacemark = geocode(latitude: 37.3318, longitude: 122.0312) with something else.
  
  – Adrian
  Oct 22 '17 at 1:25
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  You need to use it inside the closure
  
  – Leo Dabus
  Oct 22 '17 at 1:26
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Perfect. Thank you!
  
  – Adrian
  Oct 22 '17 at 1:29
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  HI, How to get the complete state name?, not in ISO code format.
  
  – Ramakrishna
  Jan 6 '18 at 11:22
  

  
  
  
  

add a comment | 

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you! This gets the job done. I don't think I'm going to be able to declare a let constant like this, given it's async code. I'll refactor this let myPlacemark = geocode(latitude: 37.3318, longitude: 122.0312) with something else.
  
  – Adrian
  Oct 22 '17 at 1:25
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  You need to use it inside the closure
  
  – Leo Dabus
  Oct 22 '17 at 1:26
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Perfect. Thank you!
  
  – Adrian
  Oct 22 '17 at 1:29
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  HI, How to get the complete state name?, not in ISO code format.
  
  – Ramakrishna
  Jan 6 '18 at 11:22
  

  
  
  
  

Thank you! This gets the job done. I don't think I'm going to be able to declare a let constant like this, given it's async code. I'll refactor this let myPlacemark = geocode(latitude: 37.3318, longitude: 122.0312) with something else.

– Adrian
Oct 22 '17 at 1:25

Thank you! This gets the job done. I don't think I'm going to be able to declare a let constant like this, given it's async code. I'll refactor this let myPlacemark = geocode(latitude: 37.3318, longitude: 122.0312) with something else.

– Adrian
Oct 22 '17 at 1:25

You need to use it inside the closure

– Leo Dabus
Oct 22 '17 at 1:26

You need to use it inside the closure

– Leo Dabus
Oct 22 '17 at 1:26

Perfect. Thank you!

– Adrian
Oct 22 '17 at 1:29

Perfect. Thank you!

– Adrian
Oct 22 '17 at 1:29

HI, How to get the complete state name?, not in ISO code format.

– Ramakrishna
Jan 6 '18 at 11:22

HI, How to get the complete state name?, not in ISO code format.

– Ramakrishna
Jan 6 '18 at 11:22

add a comment | 

0

There are so many questions dealing with 'reverseGeocodeLocation' on Stack Overflow, I've seen so many of them. I'm using Swift 4.2 and I thought my 'reverseGeocodeLocation' requests might be timing out. Well, this is NOT the case, when starting to move with an iPhone the 'didUpdateLocations' cycles need to mature. It can take two or more cycles before 'reverseGeocodeLocation' returns placemarks.

I wrote a simple app that uses 'reverseGeocodeLocation' until 'placemarks' are returned after repeated 'didUpdateLocations' cycles. This is my own home grown 'SampleCode'. I learned a lot from using the app, it might help others understand how reverse geocode requests work in the real world.

Please give your comments on possible improvements. This code is freely given and freely taken.

import Foundation

import UIKit

import CoreLocation



class ViewController: UIViewController, CLLocationManagerDelegate {

    @IBAction func RefreshLocationButton(_ sender: Any) {

        self.requestingPlacemark = true

        self.placemarkData = nil

        //^Make another Placemark Request

        self.requestCounter = 0

        self.RequestCounterLabel.text = ""

        self.LocationLabel.text = ""

        self.PlacemarkLabel.text = ""}

    @IBOutlet weak var LocationCounterLabel: UILabel!

    @IBOutlet weak var RequestCounterLabel: UILabel!

    @IBOutlet weak var LocationLabel: UILabel!

    @IBOutlet weak var PlacemarkLabel: UILabel!

    let locationManager = CLLocationManager()

    var placemarkData: CLPlacemark!

    var placemarkString: String!

    var printPlacemarkData: Bool!

    var didUpdateLocationsCounter: Int = 0

    var requestCounter: Int = 0

    var requestingPlacemark: Bool = true



override func viewDidLoad() {

    super.viewDidLoad()

    if CLLocationManager.locationServicesEnabled() {

        locationManager.requestAlwaysAuthorization()

        locationManager.delegate = self

        //locationManager.desiredAccuracy = kCLLocationAccuracyBest

        locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation

        locationManager.startUpdatingLocation()

        self.RequestCounterLabel.text = ""

        self.LocationLabel.text = ""

        self.PlacemarkLabel.text = ""}}

func printPlacemarks() {

    if printPlacemarkData {

        self.placemarkString = "Placemark Data:"

        self.placemarkString = buildPlacemarkString(item: 1)

        self.placemarkString = buildPlacemarkString(item: 2)

        self.placemarkString = buildPlacemarkString(item: 3)

        self.placemarkString = buildPlacemarkString(item: 4)

        self.placemarkString = buildPlacemarkString(item: 5)

        self.placemarkString = buildPlacemarkString(item: 6)

        self.placemarkString = buildPlacemarkString(item: 7)

        self.placemarkString = buildPlacemarkString(item: 8)

        self.placemarkString = buildPlacemarkString(item: 9)

        self.placemarkString = buildPlacemarkString(item: 10)

        self.PlacemarkLabel.text = self.placemarkString

        self.printPlacemarkData = false}}

func buildPlacemarkString(item: Int) -> String {

    var elementText: String!

    var newString: String!

        switch item {

        case 1: elementText = "name: " + self.placemarkData.name!

        case 2: elementText = "subThoroughfare: " + self.placemarkData.subThoroughfare!

        case 3: elementText = "thoroughfare: " + self.placemarkData.thoroughfare!

        case 4: elementText = "postalCode: " + self.placemarkData.postalCode!

        case 5: elementText = "subLocality: " + self.placemarkData.subLocality!

        case 6: elementText = "locality: " + self.placemarkData.locality!

        case 7: elementText = "subAdministrativeArea: " + self.placemarkData.subAdministrativeArea!

        case 8: elementText = "administrativeArea: " + self.placemarkData.administrativeArea!

        case 9: elementText = "country: " + self.placemarkData.country!

        case 10: elementText = "isoCountryCode: " + self.placemarkData.isoCountryCode!

        default: print("Error: incorrect item number!")}

        newString = self.placemarkString + "n" + elementText

    return newString

}

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {

        //location prints one time and 'didUpdateLocations' is stopped:

    self.didUpdateLocationsCounter = self.didUpdateLocationsCounter + 1

    let labelString = String(describing: self.didUpdateLocationsCounter)

    self.LocationCounterLabel.text = "Location Update Counter: " + labelString

    if self.placemarkData == nil {

        //location variable:

        self.requestCounter = self.requestCounter + 1

        let textString = String(describing: self.requestCounter)

        self.RequestCounterLabel.text = "Request Counter: " + textString

        if locations.count == 0 {

            self.LocationLabel.text = "Locations: There was NONE"}

        else {

            if locations.count > 0 {

                let coordinate2D: CLLocation = locations.first!

                let location = CLLocation(latitude: coordinate2D.coordinate.latitude, longitude: coordinate2D.coordinate.longitude)

                let printString = String(describing: location)

                self.LocationLabel.text = "Location: " + printString

                let geocoder: CLGeocoder = CLGeocoder()

                geocoder.reverseGeocodeLocation(location, completionHandler: {(placemarks, error) -> Void in

                    if error != nil {

                        let errorString = String(describing: error?.localizedDescription)

                        print("reverse geodcode fail: (errorString)")

                        self.LocationCounterLabel.text = ""

                        self.RequestCounterLabel.text = ""

                        self.LocationLabel.text = "Reverse Geodcode fail: (errorString)"

                        self.PlacemarkLabel.text = ""

                        self.requestingPlacemark = false

                        return}

                    else {

                        let pm = placemarks! as [CLPlacemark]

                        //There is ALWAYS 'placemarks' Data

                        if pm.count > 0 {

                            self.placemarkData = placemarks![0]

                            self.printPlacemarkData = true

                            self.printPlacemarks()

                            self.requestingPlacemark = false}}})}

            else {

                if self.requestingPlacemark {

                    self.LocationLabel.text = "Problem: There is no 'location.first'"}}}}}}

And then the Storyboard UI:

Storyboard Image

View Controller Image

<?xml version="1.0" encoding="UTF-8"?>

<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="14460.31" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">

    <device id="retina4_7" orientation="portrait">

        <adaptation id="fullscreen"/>

    </device>

    <dependencies>

        <deployment identifier="iOS"/>

        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14460.20"/>

        <capability name="Safe area layout guides" minToolsVersion="9.0"/>

        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>

    </dependencies>

    <scenes>

        <!--View Controller-->

        <scene sceneID="tne-QT-ifu">

            <objects>

                <viewController id="BYZ-38-t0r" customClass="ViewController" customModule="MyThoroughfare" customModuleProvider="target" sceneMemberID="viewController">

                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">

                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>

                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>

                        <subviews>

                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Location Counter" lineBreakMode="tailTruncation" numberOfLines="2" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="ZIg-u9-TMR">

                                <rect key="frame" x="16" y="20" width="343" height="20.5"/>

                                <color key="backgroundColor" red="0.80000001190000003" green="0.80000001190000003" blue="0.80000001190000003" alpha="1" colorSpace="calibratedRGB"/>

                                <fontDescription key="fontDescription" type="system" pointSize="17"/>

                                <nil key="textColor"/>

                                <nil key="highlightedColor"/>

                            </label>

                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Location Count Label" lineBreakMode="tailTruncation" numberOfLines="2" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="csF-KS-xGE">

                                <rect key="frame" x="16" y="48" width="343" height="20.5"/>

                                <color key="backgroundColor" red="0.80000001190000003" green="0.80000001190000003" blue="0.80000001190000003" alpha="1" colorSpace="calibratedRGB"/>

                                <fontDescription key="fontDescription" type="system" pointSize="17"/>

                                <nil key="textColor"/>

                                <nil key="highlightedColor"/>

                            </label>

                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Location String" lineBreakMode="tailTruncation" numberOfLines="8" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="qOc-gk-gSp">

                                <rect key="frame" x="16" y="76" width="343" height="20.5"/>

                                <color key="backgroundColor" red="0.80000001190000003" green="0.80000001190000003" blue="0.80000001190000003" alpha="1" colorSpace="calibratedRGB"/>

                                <fontDescription key="fontDescription" type="system" pointSize="17"/>

                                <nil key="textColor"/>

                                <nil key="highlightedColor"/>

                            </label>

                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Placemark String" lineBreakMode="tailTruncation" numberOfLines="14" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="42A-nO-tNf">

                                <rect key="frame" x="16" y="104" width="343" height="20.5"/>

                                <color key="backgroundColor" red="0.80000001190000003" green="0.80000001190000003" blue="0.80000001190000003" alpha="1" colorSpace="calibratedRGB"/>

                                <fontDescription key="fontDescription" type="system" pointSize="17"/>

                                <nil key="textColor"/>

                                <nil key="highlightedColor"/>

                            </label>

                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="HgN-oB-ds0">

                                <rect key="frame" x="121.5" y="578" width="132" height="30"/>

                                <state key="normal" title="Request Placemark"/>

                                <connections>

                                    <action selector="RefreshLocationButton:" destination="BYZ-38-t0r" eventType="touchUpInside" id="izY-S5-wjg"/>

                                </connections>

                            </button>

                        </subviews>

                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>

                        <constraints>

                            <constraint firstItem="ZIg-u9-TMR" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="16" id="6HO-kN-l1z"/>

                            <constraint firstItem="qOc-gk-gSp" firstAttribute="top" secondItem="csF-KS-xGE" secondAttribute="bottom" constant="7.5" id="6ux-dx-gJr"/>

                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="42A-nO-tNf" secondAttribute="trailing" constant="16" id="8dG-gV-Cob"/>

                            <constraint firstItem="HgN-oB-ds0" firstAttribute="centerX" secondItem="8bC-Xf-vdC" secondAttribute="centerX" id="A38-Nt-i3D"/>

                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="ZIg-u9-TMR" secondAttribute="trailing" constant="16" id="Bb0-YC-oov"/>

                            <constraint firstItem="csF-KS-xGE" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="16" id="FJU-ha-HkL"/>

                            <constraint firstItem="42A-nO-tNf" firstAttribute="top" secondItem="qOc-gk-gSp" secondAttribute="bottom" constant="7.5" id="SpR-XB-MLG"/>

                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="bottom" secondItem="HgN-oB-ds0" secondAttribute="bottom" constant="59" id="Vr6-QE-230"/>

                            <constraint firstItem="42A-nO-tNf" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="16" id="aHo-kJ-aCb"/>

                            <constraint firstItem="csF-KS-xGE" firstAttribute="top" secondItem="ZIg-u9-TMR" secondAttribute="bottom" constant="7.5" id="c63-Mq-ItW"/>

                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="csF-KS-xGE" secondAttribute="trailing" constant="16" id="dlV-Hc-8XJ"/>

                            <constraint firstItem="qOc-gk-gSp" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="16" id="m5y-Q8-jxI"/>

                            <constraint firstItem="ZIg-u9-TMR" firstAttribute="top" secondItem="6Tk-OE-BBY" secondAttribute="top" id="sdw-WQ-Bx9"/>

                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="qOc-gk-gSp" secondAttribute="trailing" constant="16" id="woB-ig-i5v"/>

                        </constraints>

                        <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>

                    </view>

                    <connections>

                        <outlet property="LocationCounterLabel" destination="ZIg-u9-TMR" id="K4g-WT-f82"/>

                        <outlet property="LocationLabel" destination="qOc-gk-gSp" id="Cdw-bw-EWt"/>

                        <outlet property="PlacemarkLabel" destination="42A-nO-tNf" id="dMh-bw-cRE"/>

                        <outlet property="RequestCounterLabel" destination="csF-KS-xGE" id="ai6-zn-Toi"/>

                    </connections>

                </viewController>

                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>

            </objects>

            <point key="canvasLocation" x="53.600000000000001" y="66.11694152923539"/>

        </scene>

    </scenes>

</document>

share|improve this answer

edited Jan 1 at 5:25

answered Jan 1 at 0:40

B. WasonB. Wason

145

add a comment | 

0

There are so many questions dealing with 'reverseGeocodeLocation' on Stack Overflow, I've seen so many of them. I'm using Swift 4.2 and I thought my 'reverseGeocodeLocation' requests might be timing out. Well, this is NOT the case, when starting to move with an iPhone the 'didUpdateLocations' cycles need to mature. It can take two or more cycles before 'reverseGeocodeLocation' returns placemarks.

I wrote a simple app that uses 'reverseGeocodeLocation' until 'placemarks' are returned after repeated 'didUpdateLocations' cycles. This is my own home grown 'SampleCode'. I learned a lot from using the app, it might help others understand how reverse geocode requests work in the real world.

Please give your comments on possible improvements. This code is freely given and freely taken.

import Foundation

import UIKit

import CoreLocation



class ViewController: UIViewController, CLLocationManagerDelegate {

    @IBAction func RefreshLocationButton(_ sender: Any) {

        self.requestingPlacemark = true

        self.placemarkData = nil

        //^Make another Placemark Request

        self.requestCounter = 0

        self.RequestCounterLabel.text = ""

        self.LocationLabel.text = ""

        self.PlacemarkLabel.text = ""}

    @IBOutlet weak var LocationCounterLabel: UILabel!

    @IBOutlet weak var RequestCounterLabel: UILabel!

    @IBOutlet weak var LocationLabel: UILabel!

    @IBOutlet weak var PlacemarkLabel: UILabel!

    let locationManager = CLLocationManager()

    var placemarkData: CLPlacemark!

    var placemarkString: String!

    var printPlacemarkData: Bool!

    var didUpdateLocationsCounter: Int = 0

    var requestCounter: Int = 0

    var requestingPlacemark: Bool = true



override func viewDidLoad() {

    super.viewDidLoad()

    if CLLocationManager.locationServicesEnabled() {

        locationManager.requestAlwaysAuthorization()

        locationManager.delegate = self

        //locationManager.desiredAccuracy = kCLLocationAccuracyBest

        locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation

        locationManager.startUpdatingLocation()

        self.RequestCounterLabel.text = ""

        self.LocationLabel.text = ""

        self.PlacemarkLabel.text = ""}}

func printPlacemarks() {

    if printPlacemarkData {

        self.placemarkString = "Placemark Data:"

        self.placemarkString = buildPlacemarkString(item: 1)

        self.placemarkString = buildPlacemarkString(item: 2)

        self.placemarkString = buildPlacemarkString(item: 3)

        self.placemarkString = buildPlacemarkString(item: 4)

        self.placemarkString = buildPlacemarkString(item: 5)

        self.placemarkString = buildPlacemarkString(item: 6)

        self.placemarkString = buildPlacemarkString(item: 7)

        self.placemarkString = buildPlacemarkString(item: 8)

        self.placemarkString = buildPlacemarkString(item: 9)

        self.placemarkString = buildPlacemarkString(item: 10)

        self.PlacemarkLabel.text = self.placemarkString

        self.printPlacemarkData = false}}

func buildPlacemarkString(item: Int) -> String {

    var elementText: String!

    var newString: String!

        switch item {

        case 1: elementText = "name: " + self.placemarkData.name!

        case 2: elementText = "subThoroughfare: " + self.placemarkData.subThoroughfare!

        case 3: elementText = "thoroughfare: " + self.placemarkData.thoroughfare!

        case 4: elementText = "postalCode: " + self.placemarkData.postalCode!

        case 5: elementText = "subLocality: " + self.placemarkData.subLocality!

        case 6: elementText = "locality: " + self.placemarkData.locality!

        case 7: elementText = "subAdministrativeArea: " + self.placemarkData.subAdministrativeArea!

        case 8: elementText = "administrativeArea: " + self.placemarkData.administrativeArea!

        case 9: elementText = "country: " + self.placemarkData.country!

        case 10: elementText = "isoCountryCode: " + self.placemarkData.isoCountryCode!

        default: print("Error: incorrect item number!")}

        newString = self.placemarkString + "n" + elementText

    return newString

}

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {

        //location prints one time and 'didUpdateLocations' is stopped:

    self.didUpdateLocationsCounter = self.didUpdateLocationsCounter + 1

    let labelString = String(describing: self.didUpdateLocationsCounter)

    self.LocationCounterLabel.text = "Location Update Counter: " + labelString

    if self.placemarkData == nil {

        //location variable:

        self.requestCounter = self.requestCounter + 1

        let textString = String(describing: self.requestCounter)

        self.RequestCounterLabel.text = "Request Counter: " + textString

        if locations.count == 0 {

            self.LocationLabel.text = "Locations: There was NONE"}

        else {

            if locations.count > 0 {

                let coordinate2D: CLLocation = locations.first!

                let location = CLLocation(latitude: coordinate2D.coordinate.latitude, longitude: coordinate2D.coordinate.longitude)

                let printString = String(describing: location)

                self.LocationLabel.text = "Location: " + printString

                let geocoder: CLGeocoder = CLGeocoder()

                geocoder.reverseGeocodeLocation(location, completionHandler: {(placemarks, error) -> Void in

                    if error != nil {

                        let errorString = String(describing: error?.localizedDescription)

                        print("reverse geodcode fail: (errorString)")

                        self.LocationCounterLabel.text = ""

                        self.RequestCounterLabel.text = ""

                        self.LocationLabel.text = "Reverse Geodcode fail: (errorString)"

                        self.PlacemarkLabel.text = ""

                        self.requestingPlacemark = false

                        return}

                    else {

                        let pm = placemarks! as [CLPlacemark]

                        //There is ALWAYS 'placemarks' Data

                        if pm.count > 0 {

                            self.placemarkData = placemarks![0]

                            self.printPlacemarkData = true

                            self.printPlacemarks()

                            self.requestingPlacemark = false}}})}

            else {

                if self.requestingPlacemark {

                    self.LocationLabel.text = "Problem: There is no 'location.first'"}}}}}}

And then the Storyboard UI:

Storyboard Image

View Controller Image

<?xml version="1.0" encoding="UTF-8"?>

<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="14460.31" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">

    <device id="retina4_7" orientation="portrait">

        <adaptation id="fullscreen"/>

    </device>

    <dependencies>

        <deployment identifier="iOS"/>

        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14460.20"/>

        <capability name="Safe area layout guides" minToolsVersion="9.0"/>

        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>

    </dependencies>

    <scenes>

        <!--View Controller-->

        <scene sceneID="tne-QT-ifu">

            <objects>

                <viewController id="BYZ-38-t0r" customClass="ViewController" customModule="MyThoroughfare" customModuleProvider="target" sceneMemberID="viewController">

                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">

                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>

                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>

                        <subviews>

                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Location Counter" lineBreakMode="tailTruncation" numberOfLines="2" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="ZIg-u9-TMR">

                                <rect key="frame" x="16" y="20" width="343" height="20.5"/>

                                <color key="backgroundColor" red="0.80000001190000003" green="0.80000001190000003" blue="0.80000001190000003" alpha="1" colorSpace="calibratedRGB"/>

                                <fontDescription key="fontDescription" type="system" pointSize="17"/>

                                <nil key="textColor"/>

                                <nil key="highlightedColor"/>

                            </label>

                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Location Count Label" lineBreakMode="tailTruncation" numberOfLines="2" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="csF-KS-xGE">

                                <rect key="frame" x="16" y="48" width="343" height="20.5"/>

                                <color key="backgroundColor" red="0.80000001190000003" green="0.80000001190000003" blue="0.80000001190000003" alpha="1" colorSpace="calibratedRGB"/>

                                <fontDescription key="fontDescription" type="system" pointSize="17"/>

                                <nil key="textColor"/>

                                <nil key="highlightedColor"/>

                            </label>

                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Location String" lineBreakMode="tailTruncation" numberOfLines="8" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="qOc-gk-gSp">

                                <rect key="frame" x="16" y="76" width="343" height="20.5"/>

                                <color key="backgroundColor" red="0.80000001190000003" green="0.80000001190000003" blue="0.80000001190000003" alpha="1" colorSpace="calibratedRGB"/>

                                <fontDescription key="fontDescription" type="system" pointSize="17"/>

                                <nil key="textColor"/>

                                <nil key="highlightedColor"/>

                            </label>

                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Placemark String" lineBreakMode="tailTruncation" numberOfLines="14" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="42A-nO-tNf">

                                <rect key="frame" x="16" y="104" width="343" height="20.5"/>

                                <color key="backgroundColor" red="0.80000001190000003" green="0.80000001190000003" blue="0.80000001190000003" alpha="1" colorSpace="calibratedRGB"/>

                                <fontDescription key="fontDescription" type="system" pointSize="17"/>

                                <nil key="textColor"/>

                                <nil key="highlightedColor"/>

                            </label>

                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="HgN-oB-ds0">

                                <rect key="frame" x="121.5" y="578" width="132" height="30"/>

                                <state key="normal" title="Request Placemark"/>

                                <connections>

                                    <action selector="RefreshLocationButton:" destination="BYZ-38-t0r" eventType="touchUpInside" id="izY-S5-wjg"/>

                                </connections>

                            </button>

                        </subviews>

                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>

                        <constraints>

                            <constraint firstItem="ZIg-u9-TMR" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="16" id="6HO-kN-l1z"/>

                            <constraint firstItem="qOc-gk-gSp" firstAttribute="top" secondItem="csF-KS-xGE" secondAttribute="bottom" constant="7.5" id="6ux-dx-gJr"/>

                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="42A-nO-tNf" secondAttribute="trailing" constant="16" id="8dG-gV-Cob"/>

                            <constraint firstItem="HgN-oB-ds0" firstAttribute="centerX" secondItem="8bC-Xf-vdC" secondAttribute="centerX" id="A38-Nt-i3D"/>

                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="ZIg-u9-TMR" secondAttribute="trailing" constant="16" id="Bb0-YC-oov"/>

                            <constraint firstItem="csF-KS-xGE" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="16" id="FJU-ha-HkL"/>

                            <constraint firstItem="42A-nO-tNf" firstAttribute="top" secondItem="qOc-gk-gSp" secondAttribute="bottom" constant="7.5" id="SpR-XB-MLG"/>

                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="bottom" secondItem="HgN-oB-ds0" secondAttribute="bottom" constant="59" id="Vr6-QE-230"/>

                            <constraint firstItem="42A-nO-tNf" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="16" id="aHo-kJ-aCb"/>

                            <constraint firstItem="csF-KS-xGE" firstAttribute="top" secondItem="ZIg-u9-TMR" secondAttribute="bottom" constant="7.5" id="c63-Mq-ItW"/>

                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="csF-KS-xGE" secondAttribute="trailing" constant="16" id="dlV-Hc-8XJ"/>

                            <constraint firstItem="qOc-gk-gSp" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="16" id="m5y-Q8-jxI"/>

                            <constraint firstItem="ZIg-u9-TMR" firstAttribute="top" secondItem="6Tk-OE-BBY" secondAttribute="top" id="sdw-WQ-Bx9"/>

                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="qOc-gk-gSp" secondAttribute="trailing" constant="16" id="woB-ig-i5v"/>

                        </constraints>

                        <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>

                    </view>

                    <connections>

                        <outlet property="LocationCounterLabel" destination="ZIg-u9-TMR" id="K4g-WT-f82"/>

                        <outlet property="LocationLabel" destination="qOc-gk-gSp" id="Cdw-bw-EWt"/>

                        <outlet property="PlacemarkLabel" destination="42A-nO-tNf" id="dMh-bw-cRE"/>

                        <outlet property="RequestCounterLabel" destination="csF-KS-xGE" id="ai6-zn-Toi"/>

                    </connections>

                </viewController>

                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>

            </objects>

            <point key="canvasLocation" x="53.600000000000001" y="66.11694152923539"/>

        </scene>

    </scenes>

</document>

share|improve this answer

edited Jan 1 at 5:25

answered Jan 1 at 0:40

B. WasonB. Wason

145

add a comment | 

0

0

0

There are so many questions dealing with 'reverseGeocodeLocation' on Stack Overflow, I've seen so many of them. I'm using Swift 4.2 and I thought my 'reverseGeocodeLocation' requests might be timing out. Well, this is NOT the case, when starting to move with an iPhone the 'didUpdateLocations' cycles need to mature. It can take two or more cycles before 'reverseGeocodeLocation' returns placemarks.

I wrote a simple app that uses 'reverseGeocodeLocation' until 'placemarks' are returned after repeated 'didUpdateLocations' cycles. This is my own home grown 'SampleCode'. I learned a lot from using the app, it might help others understand how reverse geocode requests work in the real world.

Please give your comments on possible improvements. This code is freely given and freely taken.

import Foundation

import UIKit

import CoreLocation



class ViewController: UIViewController, CLLocationManagerDelegate {

    @IBAction func RefreshLocationButton(_ sender: Any) {

        self.requestingPlacemark = true

        self.placemarkData = nil

        //^Make another Placemark Request

        self.requestCounter = 0

        self.RequestCounterLabel.text = ""

        self.LocationLabel.text = ""

        self.PlacemarkLabel.text = ""}

    @IBOutlet weak var LocationCounterLabel: UILabel!

    @IBOutlet weak var RequestCounterLabel: UILabel!

    @IBOutlet weak var LocationLabel: UILabel!

    @IBOutlet weak var PlacemarkLabel: UILabel!

    let locationManager = CLLocationManager()

    var placemarkData: CLPlacemark!

    var placemarkString: String!

    var printPlacemarkData: Bool!

    var didUpdateLocationsCounter: Int = 0

    var requestCounter: Int = 0

    var requestingPlacemark: Bool = true



override func viewDidLoad() {

    super.viewDidLoad()

    if CLLocationManager.locationServicesEnabled() {

        locationManager.requestAlwaysAuthorization()

        locationManager.delegate = self

        //locationManager.desiredAccuracy = kCLLocationAccuracyBest

        locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation

        locationManager.startUpdatingLocation()

        self.RequestCounterLabel.text = ""

        self.LocationLabel.text = ""

        self.PlacemarkLabel.text = ""}}

func printPlacemarks() {

    if printPlacemarkData {

        self.placemarkString = "Placemark Data:"

        self.placemarkString = buildPlacemarkString(item: 1)

        self.placemarkString = buildPlacemarkString(item: 2)

        self.placemarkString = buildPlacemarkString(item: 3)

        self.placemarkString = buildPlacemarkString(item: 4)

        self.placemarkString = buildPlacemarkString(item: 5)

        self.placemarkString = buildPlacemarkString(item: 6)

        self.placemarkString = buildPlacemarkString(item: 7)

        self.placemarkString = buildPlacemarkString(item: 8)

        self.placemarkString = buildPlacemarkString(item: 9)

        self.placemarkString = buildPlacemarkString(item: 10)

        self.PlacemarkLabel.text = self.placemarkString

        self.printPlacemarkData = false}}

func buildPlacemarkString(item: Int) -> String {

    var elementText: String!

    var newString: String!

        switch item {

        case 1: elementText = "name: " + self.placemarkData.name!

        case 2: elementText = "subThoroughfare: " + self.placemarkData.subThoroughfare!

        case 3: elementText = "thoroughfare: " + self.placemarkData.thoroughfare!

        case 4: elementText = "postalCode: " + self.placemarkData.postalCode!

        case 5: elementText = "subLocality: " + self.placemarkData.subLocality!

        case 6: elementText = "locality: " + self.placemarkData.locality!

        case 7: elementText = "subAdministrativeArea: " + self.placemarkData.subAdministrativeArea!

        case 8: elementText = "administrativeArea: " + self.placemarkData.administrativeArea!

        case 9: elementText = "country: " + self.placemarkData.country!

        case 10: elementText = "isoCountryCode: " + self.placemarkData.isoCountryCode!

        default: print("Error: incorrect item number!")}

        newString = self.placemarkString + "n" + elementText

    return newString

}

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {

        //location prints one time and 'didUpdateLocations' is stopped:

    self.didUpdateLocationsCounter = self.didUpdateLocationsCounter + 1

    let labelString = String(describing: self.didUpdateLocationsCounter)

    self.LocationCounterLabel.text = "Location Update Counter: " + labelString

    if self.placemarkData == nil {

        //location variable:

        self.requestCounter = self.requestCounter + 1

        let textString = String(describing: self.requestCounter)

        self.RequestCounterLabel.text = "Request Counter: " + textString

        if locations.count == 0 {

            self.LocationLabel.text = "Locations: There was NONE"}

        else {

            if locations.count > 0 {

                let coordinate2D: CLLocation = locations.first!

                let location = CLLocation(latitude: coordinate2D.coordinate.latitude, longitude: coordinate2D.coordinate.longitude)

                let printString = String(describing: location)

                self.LocationLabel.text = "Location: " + printString

                let geocoder: CLGeocoder = CLGeocoder()

                geocoder.reverseGeocodeLocation(location, completionHandler: {(placemarks, error) -> Void in

                    if error != nil {

                        let errorString = String(describing: error?.localizedDescription)

                        print("reverse geodcode fail: (errorString)")

                        self.LocationCounterLabel.text = ""

                        self.RequestCounterLabel.text = ""

                        self.LocationLabel.text = "Reverse Geodcode fail: (errorString)"

                        self.PlacemarkLabel.text = ""

                        self.requestingPlacemark = false

                        return}

                    else {

                        let pm = placemarks! as [CLPlacemark]

                        //There is ALWAYS 'placemarks' Data

                        if pm.count > 0 {

                            self.placemarkData = placemarks![0]

                            self.printPlacemarkData = true

                            self.printPlacemarks()

                            self.requestingPlacemark = false}}})}

            else {

                if self.requestingPlacemark {

                    self.LocationLabel.text = "Problem: There is no 'location.first'"}}}}}}

And then the Storyboard UI:

Storyboard Image

View Controller Image

<?xml version="1.0" encoding="UTF-8"?>

<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="14460.31" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">

    <device id="retina4_7" orientation="portrait">

        <adaptation id="fullscreen"/>

    </device>

    <dependencies>

        <deployment identifier="iOS"/>

        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14460.20"/>

        <capability name="Safe area layout guides" minToolsVersion="9.0"/>

        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>

    </dependencies>

    <scenes>

        <!--View Controller-->

        <scene sceneID="tne-QT-ifu">

            <objects>

                <viewController id="BYZ-38-t0r" customClass="ViewController" customModule="MyThoroughfare" customModuleProvider="target" sceneMemberID="viewController">

                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">

                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>

                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>

                        <subviews>

                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Location Counter" lineBreakMode="tailTruncation" numberOfLines="2" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="ZIg-u9-TMR">

                                <rect key="frame" x="16" y="20" width="343" height="20.5"/>

                                <color key="backgroundColor" red="0.80000001190000003" green="0.80000001190000003" blue="0.80000001190000003" alpha="1" colorSpace="calibratedRGB"/>

                                <fontDescription key="fontDescription" type="system" pointSize="17"/>

                                <nil key="textColor"/>

                                <nil key="highlightedColor"/>

                            </label>

                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Location Count Label" lineBreakMode="tailTruncation" numberOfLines="2" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="csF-KS-xGE">

                                <rect key="frame" x="16" y="48" width="343" height="20.5"/>

                                <color key="backgroundColor" red="0.80000001190000003" green="0.80000001190000003" blue="0.80000001190000003" alpha="1" colorSpace="calibratedRGB"/>

                                <fontDescription key="fontDescription" type="system" pointSize="17"/>

                                <nil key="textColor"/>

                                <nil key="highlightedColor"/>

                            </label>

                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Location String" lineBreakMode="tailTruncation" numberOfLines="8" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="qOc-gk-gSp">

                                <rect key="frame" x="16" y="76" width="343" height="20.5"/>

                                <color key="backgroundColor" red="0.80000001190000003" green="0.80000001190000003" blue="0.80000001190000003" alpha="1" colorSpace="calibratedRGB"/>

                                <fontDescription key="fontDescription" type="system" pointSize="17"/>

                                <nil key="textColor"/>

                                <nil key="highlightedColor"/>

                            </label>

                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Placemark String" lineBreakMode="tailTruncation" numberOfLines="14" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="42A-nO-tNf">

                                <rect key="frame" x="16" y="104" width="343" height="20.5"/>

                                <color key="backgroundColor" red="0.80000001190000003" green="0.80000001190000003" blue="0.80000001190000003" alpha="1" colorSpace="calibratedRGB"/>

                                <fontDescription key="fontDescription" type="system" pointSize="17"/>

                                <nil key="textColor"/>

                                <nil key="highlightedColor"/>

                            </label>

                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="HgN-oB-ds0">

                                <rect key="frame" x="121.5" y="578" width="132" height="30"/>

                                <state key="normal" title="Request Placemark"/>

                                <connections>

                                    <action selector="RefreshLocationButton:" destination="BYZ-38-t0r" eventType="touchUpInside" id="izY-S5-wjg"/>

                                </connections>

                            </button>

                        </subviews>

                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>

                        <constraints>

                            <constraint firstItem="ZIg-u9-TMR" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="16" id="6HO-kN-l1z"/>

                            <constraint firstItem="qOc-gk-gSp" firstAttribute="top" secondItem="csF-KS-xGE" secondAttribute="bottom" constant="7.5" id="6ux-dx-gJr"/>

                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="42A-nO-tNf" secondAttribute="trailing" constant="16" id="8dG-gV-Cob"/>

                            <constraint firstItem="HgN-oB-ds0" firstAttribute="centerX" secondItem="8bC-Xf-vdC" secondAttribute="centerX" id="A38-Nt-i3D"/>

                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="ZIg-u9-TMR" secondAttribute="trailing" constant="16" id="Bb0-YC-oov"/>

                            <constraint firstItem="csF-KS-xGE" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="16" id="FJU-ha-HkL"/>

                            <constraint firstItem="42A-nO-tNf" firstAttribute="top" secondItem="qOc-gk-gSp" secondAttribute="bottom" constant="7.5" id="SpR-XB-MLG"/>

                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="bottom" secondItem="HgN-oB-ds0" secondAttribute="bottom" constant="59" id="Vr6-QE-230"/>

                            <constraint firstItem="42A-nO-tNf" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="16" id="aHo-kJ-aCb"/>

                            <constraint firstItem="csF-KS-xGE" firstAttribute="top" secondItem="ZIg-u9-TMR" secondAttribute="bottom" constant="7.5" id="c63-Mq-ItW"/>

                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="csF-KS-xGE" secondAttribute="trailing" constant="16" id="dlV-Hc-8XJ"/>

                            <constraint firstItem="qOc-gk-gSp" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="16" id="m5y-Q8-jxI"/>

                            <constraint firstItem="ZIg-u9-TMR" firstAttribute="top" secondItem="6Tk-OE-BBY" secondAttribute="top" id="sdw-WQ-Bx9"/>

                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="qOc-gk-gSp" secondAttribute="trailing" constant="16" id="woB-ig-i5v"/>

                        </constraints>

                        <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>

                    </view>

                    <connections>

                        <outlet property="LocationCounterLabel" destination="ZIg-u9-TMR" id="K4g-WT-f82"/>

                        <outlet property="LocationLabel" destination="qOc-gk-gSp" id="Cdw-bw-EWt"/>

                        <outlet property="PlacemarkLabel" destination="42A-nO-tNf" id="dMh-bw-cRE"/>

                        <outlet property="RequestCounterLabel" destination="csF-KS-xGE" id="ai6-zn-Toi"/>

                    </connections>

                </viewController>

                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>

            </objects>

            <point key="canvasLocation" x="53.600000000000001" y="66.11694152923539"/>

        </scene>

    </scenes>

</document>

share|improve this answer

edited Jan 1 at 5:25

answered Jan 1 at 0:40

B. WasonB. Wason

145

There are so many questions dealing with 'reverseGeocodeLocation' on Stack Overflow, I've seen so many of them. I'm using Swift 4.2 and I thought my 'reverseGeocodeLocation' requests might be timing out. Well, this is NOT the case, when starting to move with an iPhone the 'didUpdateLocations' cycles need to mature. It can take two or more cycles before 'reverseGeocodeLocation' returns placemarks.

I wrote a simple app that uses 'reverseGeocodeLocation' until 'placemarks' are returned after repeated 'didUpdateLocations' cycles. This is my own home grown 'SampleCode'. I learned a lot from using the app, it might help others understand how reverse geocode requests work in the real world.

Please give your comments on possible improvements. This code is freely given and freely taken.

import Foundation

import UIKit

import CoreLocation



class ViewController: UIViewController, CLLocationManagerDelegate {

    @IBAction func RefreshLocationButton(_ sender: Any) {

        self.requestingPlacemark = true

        self.placemarkData = nil

        //^Make another Placemark Request

        self.requestCounter = 0

        self.RequestCounterLabel.text = ""

        self.LocationLabel.text = ""

        self.PlacemarkLabel.text = ""}

    @IBOutlet weak var LocationCounterLabel: UILabel!

    @IBOutlet weak var RequestCounterLabel: UILabel!

    @IBOutlet weak var LocationLabel: UILabel!

    @IBOutlet weak var PlacemarkLabel: UILabel!

    let locationManager = CLLocationManager()

    var placemarkData: CLPlacemark!

    var placemarkString: String!

    var printPlacemarkData: Bool!

    var didUpdateLocationsCounter: Int = 0

    var requestCounter: Int = 0

    var requestingPlacemark: Bool = true



override func viewDidLoad() {

    super.viewDidLoad()

    if CLLocationManager.locationServicesEnabled() {

        locationManager.requestAlwaysAuthorization()

        locationManager.delegate = self

        //locationManager.desiredAccuracy = kCLLocationAccuracyBest

        locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation

        locationManager.startUpdatingLocation()

        self.RequestCounterLabel.text = ""

        self.LocationLabel.text = ""

        self.PlacemarkLabel.text = ""}}

func printPlacemarks() {

    if printPlacemarkData {

        self.placemarkString = "Placemark Data:"

        self.placemarkString = buildPlacemarkString(item: 1)

        self.placemarkString = buildPlacemarkString(item: 2)

        self.placemarkString = buildPlacemarkString(item: 3)

        self.placemarkString = buildPlacemarkString(item: 4)

        self.placemarkString = buildPlacemarkString(item: 5)

        self.placemarkString = buildPlacemarkString(item: 6)

        self.placemarkString = buildPlacemarkString(item: 7)

        self.placemarkString = buildPlacemarkString(item: 8)

        self.placemarkString = buildPlacemarkString(item: 9)

        self.placemarkString = buildPlacemarkString(item: 10)

        self.PlacemarkLabel.text = self.placemarkString

        self.printPlacemarkData = false}}

func buildPlacemarkString(item: Int) -> String {

    var elementText: String!

    var newString: String!

        switch item {

        case 1: elementText = "name: " + self.placemarkData.name!

        case 2: elementText = "subThoroughfare: " + self.placemarkData.subThoroughfare!

        case 3: elementText = "thoroughfare: " + self.placemarkData.thoroughfare!

        case 4: elementText = "postalCode: " + self.placemarkData.postalCode!

        case 5: elementText = "subLocality: " + self.placemarkData.subLocality!

        case 6: elementText = "locality: " + self.placemarkData.locality!

        case 7: elementText = "subAdministrativeArea: " + self.placemarkData.subAdministrativeArea!

        case 8: elementText = "administrativeArea: " + self.placemarkData.administrativeArea!

        case 9: elementText = "country: " + self.placemarkData.country!

        case 10: elementText = "isoCountryCode: " + self.placemarkData.isoCountryCode!

        default: print("Error: incorrect item number!")}

        newString = self.placemarkString + "n" + elementText

    return newString

}

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {

        //location prints one time and 'didUpdateLocations' is stopped:

    self.didUpdateLocationsCounter = self.didUpdateLocationsCounter + 1

    let labelString = String(describing: self.didUpdateLocationsCounter)

    self.LocationCounterLabel.text = "Location Update Counter: " + labelString

    if self.placemarkData == nil {

        //location variable:

        self.requestCounter = self.requestCounter + 1

        let textString = String(describing: self.requestCounter)

        self.RequestCounterLabel.text = "Request Counter: " + textString

        if locations.count == 0 {

            self.LocationLabel.text = "Locations: There was NONE"}

        else {

            if locations.count > 0 {

                let coordinate2D: CLLocation = locations.first!

                let location = CLLocation(latitude: coordinate2D.coordinate.latitude, longitude: coordinate2D.coordinate.longitude)

                let printString = String(describing: location)

                self.LocationLabel.text = "Location: " + printString

                let geocoder: CLGeocoder = CLGeocoder()

                geocoder.reverseGeocodeLocation(location, completionHandler: {(placemarks, error) -> Void in

                    if error != nil {

                        let errorString = String(describing: error?.localizedDescription)

                        print("reverse geodcode fail: (errorString)")

                        self.LocationCounterLabel.text = ""

                        self.RequestCounterLabel.text = ""

                        self.LocationLabel.text = "Reverse Geodcode fail: (errorString)"

                        self.PlacemarkLabel.text = ""

                        self.requestingPlacemark = false

                        return}

                    else {

                        let pm = placemarks! as [CLPlacemark]

                        //There is ALWAYS 'placemarks' Data

                        if pm.count > 0 {

                            self.placemarkData = placemarks![0]

                            self.printPlacemarkData = true

                            self.printPlacemarks()

                            self.requestingPlacemark = false}}})}

            else {

                if self.requestingPlacemark {

                    self.LocationLabel.text = "Problem: There is no 'location.first'"}}}}}}

And then the Storyboard UI:

Storyboard Image

View Controller Image

<?xml version="1.0" encoding="UTF-8"?>

<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="14460.31" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">

    <device id="retina4_7" orientation="portrait">

        <adaptation id="fullscreen"/>

    </device>

    <dependencies>

        <deployment identifier="iOS"/>

        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14460.20"/>

        <capability name="Safe area layout guides" minToolsVersion="9.0"/>

        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>

    </dependencies>

    <scenes>

        <!--View Controller-->

        <scene sceneID="tne-QT-ifu">

            <objects>

                <viewController id="BYZ-38-t0r" customClass="ViewController" customModule="MyThoroughfare" customModuleProvider="target" sceneMemberID="viewController">

                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">

                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>

                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>

                        <subviews>

                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Location Counter" lineBreakMode="tailTruncation" numberOfLines="2" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="ZIg-u9-TMR">

                                <rect key="frame" x="16" y="20" width="343" height="20.5"/>

                                <color key="backgroundColor" red="0.80000001190000003" green="0.80000001190000003" blue="0.80000001190000003" alpha="1" colorSpace="calibratedRGB"/>

                                <fontDescription key="fontDescription" type="system" pointSize="17"/>

                                <nil key="textColor"/>

                                <nil key="highlightedColor"/>

                            </label>

                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Location Count Label" lineBreakMode="tailTruncation" numberOfLines="2" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="csF-KS-xGE">

                                <rect key="frame" x="16" y="48" width="343" height="20.5"/>

                                <color key="backgroundColor" red="0.80000001190000003" green="0.80000001190000003" blue="0.80000001190000003" alpha="1" colorSpace="calibratedRGB"/>

                                <fontDescription key="fontDescription" type="system" pointSize="17"/>

                                <nil key="textColor"/>

                                <nil key="highlightedColor"/>

                            </label>

                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Location String" lineBreakMode="tailTruncation" numberOfLines="8" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="qOc-gk-gSp">

                                <rect key="frame" x="16" y="76" width="343" height="20.5"/>

                                <color key="backgroundColor" red="0.80000001190000003" green="0.80000001190000003" blue="0.80000001190000003" alpha="1" colorSpace="calibratedRGB"/>

                                <fontDescription key="fontDescription" type="system" pointSize="17"/>

                                <nil key="textColor"/>

                                <nil key="highlightedColor"/>

                            </label>

                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Placemark String" lineBreakMode="tailTruncation" numberOfLines="14" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="42A-nO-tNf">

                                <rect key="frame" x="16" y="104" width="343" height="20.5"/>

                                <color key="backgroundColor" red="0.80000001190000003" green="0.80000001190000003" blue="0.80000001190000003" alpha="1" colorSpace="calibratedRGB"/>

                                <fontDescription key="fontDescription" type="system" pointSize="17"/>

                                <nil key="textColor"/>

                                <nil key="highlightedColor"/>

                            </label>

                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="HgN-oB-ds0">

                                <rect key="frame" x="121.5" y="578" width="132" height="30"/>

                                <state key="normal" title="Request Placemark"/>

                                <connections>

                                    <action selector="RefreshLocationButton:" destination="BYZ-38-t0r" eventType="touchUpInside" id="izY-S5-wjg"/>

                                </connections>

                            </button>

                        </subviews>

                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>

                        <constraints>

                            <constraint firstItem="ZIg-u9-TMR" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="16" id="6HO-kN-l1z"/>

                            <constraint firstItem="qOc-gk-gSp" firstAttribute="top" secondItem="csF-KS-xGE" secondAttribute="bottom" constant="7.5" id="6ux-dx-gJr"/>

                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="42A-nO-tNf" secondAttribute="trailing" constant="16" id="8dG-gV-Cob"/>

                            <constraint firstItem="HgN-oB-ds0" firstAttribute="centerX" secondItem="8bC-Xf-vdC" secondAttribute="centerX" id="A38-Nt-i3D"/>

                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="ZIg-u9-TMR" secondAttribute="trailing" constant="16" id="Bb0-YC-oov"/>

                            <constraint firstItem="csF-KS-xGE" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="16" id="FJU-ha-HkL"/>

                            <constraint firstItem="42A-nO-tNf" firstAttribute="top" secondItem="qOc-gk-gSp" secondAttribute="bottom" constant="7.5" id="SpR-XB-MLG"/>

                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="bottom" secondItem="HgN-oB-ds0" secondAttribute="bottom" constant="59" id="Vr6-QE-230"/>

                            <constraint firstItem="42A-nO-tNf" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="16" id="aHo-kJ-aCb"/>

                            <constraint firstItem="csF-KS-xGE" firstAttribute="top" secondItem="ZIg-u9-TMR" secondAttribute="bottom" constant="7.5" id="c63-Mq-ItW"/>

                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="csF-KS-xGE" secondAttribute="trailing" constant="16" id="dlV-Hc-8XJ"/>

                            <constraint firstItem="qOc-gk-gSp" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="16" id="m5y-Q8-jxI"/>

                            <constraint firstItem="ZIg-u9-TMR" firstAttribute="top" secondItem="6Tk-OE-BBY" secondAttribute="top" id="sdw-WQ-Bx9"/>

                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="qOc-gk-gSp" secondAttribute="trailing" constant="16" id="woB-ig-i5v"/>

                        </constraints>

                        <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>

                    </view>

                    <connections>

                        <outlet property="LocationCounterLabel" destination="ZIg-u9-TMR" id="K4g-WT-f82"/>

                        <outlet property="LocationLabel" destination="qOc-gk-gSp" id="Cdw-bw-EWt"/>

                        <outlet property="PlacemarkLabel" destination="42A-nO-tNf" id="dMh-bw-cRE"/>

                        <outlet property="RequestCounterLabel" destination="csF-KS-xGE" id="ai6-zn-Toi"/>

                    </connections>

                </viewController>

                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>

            </objects>

            <point key="canvasLocation" x="53.600000000000001" y="66.11694152923539"/>

        </scene>

    </scenes>

</document>

share|improve this answer

edited Jan 1 at 5:25

answered Jan 1 at 0:40

B. WasonB. Wason

145

share|improve this answer

share|improve this answer

edited Jan 1 at 5:25

edited Jan 1 at 5:25

edited Jan 1 at 5:25

answered Jan 1 at 0:40

B. WasonB. Wason

145

answered Jan 1 at 0:40

B. WasonB. Wason

145

answered Jan 1 at 0:40

B. WasonB. Wason

145

145

add a comment | 

add a comment | 

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