Create multiple UIImageViews in UICollectionViewCell











up vote
1
down vote

favorite












I'm trying to make multiple UIImageViews in a UICollectionViewCell so I wrote this code but nothing appends to lines apparently.



class chartsCell: UICollectionViewCell {



    var lines = [UIImageView]()

    var chartValueCount = Int()



    override func prepareForReuse() {

        super.prepareForReuse()

        lines.removeAll()

        chartValueCount = 0

    }



    override init(frame: CGRect) {

        super.init(frame: frame)

        for i in 0 ..< chartValueCount {

            let line = UIImageView(frame: CGRect(x: frame.width * CGFloat(i + 1) / CGFloat(chartValueCount + 1) - (10 * CGFloat(i + 1)), y: 0, width: 20, height: frame.height))

            line.backgroundColor = UIColor.blue

            line.layer.masksToBounds = true

            line.layer.cornerRadius = 10

            lines.append(line)

            contentView.addSubview(lines[i])

        }

    }



    required init?(coder aDecoder: NSCoder) {

        fatalError("init(coder:) has not been implemented")

    }

}


I change chartValueCount here:



func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "chartsCell", for: indexPath) as! chartsCell

    cell.chartValueCount = chartValueCount[indexPath.row]

    return cell

}


There are three values in chartValueCount array and as I print cell.lines it prints three .
Nothing shows up in the CollectionView because lines is empty. How do I fill it properly?






arrays swift







share|improve this question
























  • Edit: removed xcode tag as it's irrelevant. Just what IDE op is using
    – Scriptable
    yesterday















up vote
1
down vote

favorite












I'm trying to make multiple UIImageViews in a UICollectionViewCell so I wrote this code but nothing appends to lines apparently.



class chartsCell: UICollectionViewCell {



    var lines = [UIImageView]()

    var chartValueCount = Int()



    override func prepareForReuse() {

        super.prepareForReuse()

        lines.removeAll()

        chartValueCount = 0

    }



    override init(frame: CGRect) {

        super.init(frame: frame)

        for i in 0 ..< chartValueCount {

            let line = UIImageView(frame: CGRect(x: frame.width * CGFloat(i + 1) / CGFloat(chartValueCount + 1) - (10 * CGFloat(i + 1)), y: 0, width: 20, height: frame.height))

            line.backgroundColor = UIColor.blue

            line.layer.masksToBounds = true

            line.layer.cornerRadius = 10

            lines.append(line)

            contentView.addSubview(lines[i])

        }

    }



    required init?(coder aDecoder: NSCoder) {

        fatalError("init(coder:) has not been implemented")

    }

}


I change chartValueCount here:



func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "chartsCell", for: indexPath) as! chartsCell

    cell.chartValueCount = chartValueCount[indexPath.row]

    return cell

}


There are three values in chartValueCount array and as I print cell.lines it prints three .
Nothing shows up in the CollectionView because lines is empty. How do I fill it properly?






arrays swift







share|improve this question
























  • Edit: removed xcode tag as it's irrelevant. Just what IDE op is using
    – Scriptable
    yesterday













up vote
1
down vote

favorite









up vote
1
down vote

favorite











I'm trying to make multiple UIImageViews in a UICollectionViewCell so I wrote this code but nothing appends to lines apparently.



class chartsCell: UICollectionViewCell {



    var lines = [UIImageView]()

    var chartValueCount = Int()



    override func prepareForReuse() {

        super.prepareForReuse()

        lines.removeAll()

        chartValueCount = 0

    }



    override init(frame: CGRect) {

        super.init(frame: frame)

        for i in 0 ..< chartValueCount {

            let line = UIImageView(frame: CGRect(x: frame.width * CGFloat(i + 1) / CGFloat(chartValueCount + 1) - (10 * CGFloat(i + 1)), y: 0, width: 20, height: frame.height))

            line.backgroundColor = UIColor.blue

            line.layer.masksToBounds = true

            line.layer.cornerRadius = 10

            lines.append(line)

            contentView.addSubview(lines[i])

        }

    }



    required init?(coder aDecoder: NSCoder) {

        fatalError("init(coder:) has not been implemented")

    }

}


I change chartValueCount here:



func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "chartsCell", for: indexPath) as! chartsCell

    cell.chartValueCount = chartValueCount[indexPath.row]

    return cell

}


There are three values in chartValueCount array and as I print cell.lines it prints three .
Nothing shows up in the CollectionView because lines is empty. How do I fill it properly?






arrays swift







share|improve this question















I'm trying to make multiple UIImageViews in a UICollectionViewCell so I wrote this code but nothing appends to lines apparently.



class chartsCell: UICollectionViewCell {



    var lines = [UIImageView]()

    var chartValueCount = Int()



    override func prepareForReuse() {

        super.prepareForReuse()

        lines.removeAll()

        chartValueCount = 0

    }



    override init(frame: CGRect) {

        super.init(frame: frame)

        for i in 0 ..< chartValueCount {

            let line = UIImageView(frame: CGRect(x: frame.width * CGFloat(i + 1) / CGFloat(chartValueCount + 1) - (10 * CGFloat(i + 1)), y: 0, width: 20, height: frame.height))

            line.backgroundColor = UIColor.blue

            line.layer.masksToBounds = true

            line.layer.cornerRadius = 10

            lines.append(line)

            contentView.addSubview(lines[i])

        }

    }



    required init?(coder aDecoder: NSCoder) {

        fatalError("init(coder:) has not been implemented")

    }

}


I change chartValueCount here:



func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "chartsCell", for: indexPath) as! chartsCell

    cell.chartValueCount = chartValueCount[indexPath.row]

    return cell

}


There are three values in chartValueCount array and as I print cell.lines it prints three .
Nothing shows up in the CollectionView because lines is empty. How do I fill it properly?






arrays swift




arrays swift






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited yesterday









Scriptable

12k43253




12k43253










asked yesterday









vahidgr

297




297












  • Edit: removed xcode tag as it's irrelevant. Just what IDE op is using
    – Scriptable
    yesterday


















  • Edit: removed xcode tag as it's irrelevant. Just what IDE op is using
    – Scriptable
    yesterday
















Edit: removed xcode tag as it's irrelevant. Just what IDE op is using
– Scriptable
yesterday




Edit: removed xcode tag as it's irrelevant. Just what IDE op is using
– Scriptable
yesterday












1 Answer
1






active

oldest

votes

















up vote
1
down vote



accepted










class chartsCell: UICollectionViewCell {



var lines = [UIImageView]()

var chartValueCount:Int{

    didSet{

        for i in 0 ..< chartValueCount {

            let line = UIImageView(frame: CGRect(x: frame.width * CGFloat(i + 1) / CGFloat(chartValueCount + 1) - (10 * CGFloat(i + 1)), y: 0, width: 20, height: frame.height))

            line.backgroundColor = UIColor.blue

            line.layer.masksToBounds = true

            line.layer.cornerRadius = 10

            lines.append(line)

            contentView.addSubview(lines[i])

        }

    }

}



override func prepareForReuse() {

    super.prepareForReuse()

    lines.removeAll()

    chartValueCount = 0

}



override init(frame: CGRect) {

    super.init(frame: frame)



}



required init?(coder aDecoder: NSCoder) {

    fatalError("init(coder:) has not been implemented")

}


}






share|improve this answer





















    Your Answer






    StackExchange.ifUsing("editor", function () {
    StackExchange.using("externalEditor", function () {
    StackExchange.using("snippets", function () {
    StackExchange.snippets.init();
    });
    });
    }, "code-snippets");

    StackExchange.ready(function() {
    var channelOptions = {
    tags: "".split(" "),
    id: "1"
    };
    initTagRenderer("".split(" "), "".split(" "), channelOptions);

    StackExchange.using("externalEditor", function() {
    // Have to fire editor after snippets, if snippets enabled
    if (StackExchange.settings.snippets.snippetsEnabled) {
    StackExchange.using("snippets", function() {
    createEditor();
    });
    }
    else {
    createEditor();
    }
    });

    function createEditor() {
    StackExchange.prepareEditor({
    heartbeatType: 'answer',
    convertImagesToLinks: true,
    noModals: true,
    showLowRepImageUploadWarning: true,
    reputationToPostImages: 10,
    bindNavPrevention: true,
    postfix: "",
    imageUploader: {
    brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
    contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
    allowUrls: true
    },
    onDemand: true,
    discardSelector: ".discard-answer"
    ,immediatelyShowMarkdownHelp:true
    });


    }
    });














     

    draft saved


    draft discarded


















    StackExchange.ready(
    function () {
    StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53372638%2fcreate-multiple-uiimageviews-in-uicollectionviewcell%23new-answer', 'question_page');
    }
    );

    Post as a guest















    Required, but never shown

























    1 Answer
    1






    active

    oldest

    votes








    1 Answer
    1






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes








    up vote
    1
    down vote



    accepted










    class chartsCell: UICollectionViewCell {



    var lines = [UIImageView]()
    
var chartValueCount:Int{
    
    didSet{
    
        for i in 0 ..< chartValueCount {
    
            let line = UIImageView(frame: CGRect(x: frame.width * CGFloat(i + 1) / CGFloat(chartValueCount + 1) - (10 * CGFloat(i + 1)), y: 0, width: 20, height: frame.height))
    
            line.backgroundColor = UIColor.blue
    
            line.layer.masksToBounds = true
    
            line.layer.cornerRadius = 10
    
            lines.append(line)
    
            contentView.addSubview(lines[i])
    
        }
    
    }
    
}
    

    
override func prepareForReuse() {
    
    super.prepareForReuse()
    
    lines.removeAll()
    
    chartValueCount = 0
    
}
    

    
override init(frame: CGRect) {
    
    super.init(frame: frame)
    

    
}
    

    
required init?(coder aDecoder: NSCoder) {
    
    fatalError("init(coder:) has not been implemented")
    
}


    }






    share|improve this answer

























      up vote
      1
      down vote



      accepted










      class chartsCell: UICollectionViewCell {



      var lines = [UIImageView]()
      
var chartValueCount:Int{
      
    didSet{
      
        for i in 0 ..< chartValueCount {
      
            let line = UIImageView(frame: CGRect(x: frame.width * CGFloat(i + 1) / CGFloat(chartValueCount + 1) - (10 * CGFloat(i + 1)), y: 0, width: 20, height: frame.height))
      
            line.backgroundColor = UIColor.blue
      
            line.layer.masksToBounds = true
      
            line.layer.cornerRadius = 10
      
            lines.append(line)
      
            contentView.addSubview(lines[i])
      
        }
      
    }
      
}
      

      
override func prepareForReuse() {
      
    super.prepareForReuse()
      
    lines.removeAll()
      
    chartValueCount = 0
      
}
      

      
override init(frame: CGRect) {
      
    super.init(frame: frame)
      

      
}
      

      
required init?(coder aDecoder: NSCoder) {
      
    fatalError("init(coder:) has not been implemented")
      
}


      }






      share|improve this answer























        up vote
        1
        down vote



        accepted







        up vote
        1
        down vote



        accepted






        class chartsCell: UICollectionViewCell {



        var lines = [UIImageView]()
        
var chartValueCount:Int{
        
    didSet{
        
        for i in 0 ..< chartValueCount {
        
            let line = UIImageView(frame: CGRect(x: frame.width * CGFloat(i + 1) / CGFloat(chartValueCount + 1) - (10 * CGFloat(i + 1)), y: 0, width: 20, height: frame.height))
        
            line.backgroundColor = UIColor.blue
        
            line.layer.masksToBounds = true
        
            line.layer.cornerRadius = 10
        
            lines.append(line)
        
            contentView.addSubview(lines[i])
        
        }
        
    }
        
}
        

        
override func prepareForReuse() {
        
    super.prepareForReuse()
        
    lines.removeAll()
        
    chartValueCount = 0
        
}
        

        
override init(frame: CGRect) {
        
    super.init(frame: frame)
        

        
}
        

        
required init?(coder aDecoder: NSCoder) {
        
    fatalError("init(coder:) has not been implemented")
        
}


        }






        share|improve this answer












        class chartsCell: UICollectionViewCell {



        var lines = [UIImageView]()
        
var chartValueCount:Int{
        
    didSet{
        
        for i in 0 ..< chartValueCount {
        
            let line = UIImageView(frame: CGRect(x: frame.width * CGFloat(i + 1) / CGFloat(chartValueCount + 1) - (10 * CGFloat(i + 1)), y: 0, width: 20, height: frame.height))
        
            line.backgroundColor = UIColor.blue
        
            line.layer.masksToBounds = true
        
            line.layer.cornerRadius = 10
        
            lines.append(line)
        
            contentView.addSubview(lines[i])
        
        }
        
    }
        
}
        

        
override func prepareForReuse() {
        
    super.prepareForReuse()
        
    lines.removeAll()
        
    chartValueCount = 0
        
}
        

        
override init(frame: CGRect) {
        
    super.init(frame: frame)
        

        
}
        

        
required init?(coder aDecoder: NSCoder) {
        
    fatalError("init(coder:) has not been implemented")
        
}


        }







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered yesterday









        Avtar Singh

        282




        282






























             

            draft saved


            draft discarded



















































             


            draft saved


            draft discarded














            StackExchange.ready(
            function () {
            StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53372638%2fcreate-multiple-uiimageviews-in-uicollectionviewcell%23new-answer', 'question_page');
            }
            );

            Post as a guest















            Required, but never shown





















































            Required, but never shown














            Required, but never shown












            Required, but never shown







            Required, but never shown

































            Required, but never shown














            Required, but never shown












            Required, but never shown







            Required, but never shown







            Popular posts from this blog

            Can a sorcerer learn a 5th-level spell early by creating spell slots using the Font of Magic feature?

            Image
            28 6 $begingroup$ Per the Font of Magic feature, sorcerer can use Flexible Casting to create 5th-level spell slots at level 7, even though they are not typically available until level 9. You can transform unexpended sorcery points into one spell slot as a bonus action on your turn. The Creating Spell Slots table shows the cost of creating a spell slot of [5th level is 7] If such a sorcerer levels up while still having this 5th-level spell slot, can they choose a 5th-level spell as the spell they gain upon levelling up? The Spellcasting feature states: Additionally, when you gain a level in this class, you can choose one of the sorcerer spells you know and replace it with another spell from the sorcerer spell list, which also must be of a level for which you have spell slots.
            Read more

            ts Property 'filter' does not exist on type '{}'

            Image
            1 I'm trying to follow Angular Material guide to create a custom filter for autocomplete input text https://material.angular.io/components/autocomplete/overview This is what I have TS import { Component, OnInit } from '@angular/core'; import { TemplateRef } from '@angular/core'; import { FormControl } from "@angular/forms"; import { Observable } from "rxjs"; import { map, startWith, filter } from 'rxjs/operators'; (...) export class AppComponent implements OnInit { title = 'Your Profile'; displayedColumns: string = ['selected', 'name', 'description', 'pnr']; dataSource = ELEMENT_DATA; myControl = new FormControl(); options: any = ['One', 'Two', 'Three']; filteredOptions:
            Read more

            mat-slide-toggle shouldn't change it's state when I click cancel in confirmation window

            Image
            1 When I checked the slide toggle it should work as expected. But when I try to uncheck it there is a confirmation window asking if you are sure. When I click cancel in that confirmation window, still the toggle changes to unchecked, which shouldn't happen. It should stay in the same state. Here is my Html and TS Code // html <mat-slide-toggle (change)="change($event)" [checked]="isChecked()" > To-pay </mat-slide-toggle> TS code: // ts change(e) { if(this.checked) { if(confirm("Are you sure")) { console.log("toggle") } else { e.stopPropagation(); console.log("toggle should not change if I click the cancel button") }
            Read more