Mixing
RequestContentEditingInput completionHandler do not run
I have a app where i need to pick images from the phone and display them in the order the user picked them
(i need img's in the order picked , not "most recent edited" that is why i am not using UIImagePickerController)
To do this i have a page that shows the latest 50 images with the possibility to load more.
I am getting the Image path and orientation with this code below.
My problem: The CompletionHandler (in RequestContentEditingInput) will only run 17 times...
I can see that the the RequestContentEditingInput is called for every image (on this phone 138 times)
I have tried to wait but nothing happens.
The code works as intended when i have less than 17 images...
I have tried to implement a SemaphoreSlim lock in the CompletionHandler code to control that i would only process 10 images at the time but the end result was ether the same or no images was processed at all.
UpdateInfo: It seems its all the LivePhotos that is not processed.
Do anyone have an idea on what is happening here?
An idea for a fix?
Is there another way i can get all image paths and orientation?
Or a totally other solution to let the user pick images from the phone and get the order the user picked them in?
public class GalleryHelper : IGalleryHelper
{
private List<(string, string, string)> _retval;
private nint _numberofImg = 0;
private nint _currentImg = 0;
public List<(string, string, string)> GetAllImgFromGallery()
{
_retval = new List<(string, string, string)>();
_currentImg = 0;
GetAllImg();
return _retval;
}
private void GetAllImg()
{
var fetchOptions = new PHFetchOptions();
PHFetchResult allPhotos = PHAsset.FetchAssets(PHAssetMediaType.Image, fetchOptions);
_numberofImg = allPhotos.Count;
Debug.WriteLine("Total img no + " + _numberofImg);
for (nint i = 0; i < allPhotos.Count; i++)
{
Debug.WriteLine("Starting " + i);
(allPhotos[i] as PHAsset).RequestContentEditingInput(new PHContentEditingInputRequestOptions(), CompletionHandler);
}
}
private void CompletionHandler(PHContentEditingInput contentEditingInput, NSDictionary requestStatusInfo)
{
Debug.WriteLine("Starting CompletionHandler " + (1 + _currentImg));
var path = contentEditingInput.FullSizeImageUrl.Path;
if (path != null)
{
var orientation = contentEditingInput.FullSizeImageOrientation;
switch (orientation)
{
case CIImageOrientation.TopLeft:
//Standard position
_retval.Add((path, null, "0"));
break;
case CIImageOrientation.LeftBottom:
//Rotate 90 degrees clockwise
_retval.Add((path, null, "-90"));
break;
case CIImageOrientation.RightTop:
//Rotate 90 degrees counterclockwise
_retval.Add((path, null, "90"));
break;
case CIImageOrientation.BottomRight:
//Rotate 180 degrees
_retval.Add((path, null, "180"));
break;
case CIImageOrientation.BottomLeft:
//Mirror image rotated 180 degrees
_retval.Add((path, null, "180"));
break;
case CIImageOrientation.TopRight:
//Mirror image
_retval.Add((path, null, "0"));
break;
case CIImageOrientation.LeftTop:
//Mirror image rotate 90 degrees clockwise
_retval.Add((path, null, "-90"));
break;
case CIImageOrientation.RightBottom:
//Mirror image rotate 90 degrees counterclockwise.
_retval.Add((path, null, "90"));
break;
default:
_retval.Add((path, null, "0"));
break;
}
}
_currentImg++;
Debug.WriteLine("Images done " + _currentImg);
MessagingCenter.Send((App)Xamarin.Forms.Application.Current, "ImagesReady", _retval);
}
}
A paste from my Debug Output on a run:
[0:] Total img no + 138
[0:] Starting 0
[0:] Starting 1
(...)
[0:] Starting 137
[0:] Starting CompletionHandler 1
[0:] Images done 1
[0:] Starting CompletionHandler 2
[0:] Images done 2
[0:] Starting CompletionHandler 3
[0:] Images done 3
(...)
[0:] Starting CompletionHandler 15
[0:] Images done 15
[0:] Starting CompletionHandler 16
[0:] Images done 16
[0:] Starting CompletionHandler 17
[0:] Images done 17
Thread started: #17
Thread finished: #15
The thread 0xf has exited with code 0 (0x0).
Thread finished: #3
c# xamarin.forms xamarin.ios photosframework
asked Nov 21 '18 at 12:06
rrrrrr
466
add a comment |
I have a app where i need to pick images from the phone and display them in the order the user picked them
(i need img's in the order picked , not "most recent edited" that is why i am not using UIImagePickerController)
To do this i have a page that shows the latest 50 images with the possibility to load more.
I am getting the Image path and orientation with this code below.
My problem: The CompletionHandler (in RequestContentEditingInput) will only run 17 times...
I can see that the the RequestContentEditingInput is called for every image (on this phone 138 times)
I have tried to wait but nothing happens.
The code works as intended when i have less than 17 images...
I have tried to implement a SemaphoreSlim lock in the CompletionHandler code to control that i would only process 10 images at the time but the end result was ether the same or no images was processed at all.
UpdateInfo: It seems its all the LivePhotos that is not processed.
Do anyone have an idea on what is happening here?
An idea for a fix?
Is there another way i can get all image paths and orientation?
Or a totally other solution to let the user pick images from the phone and get the order the user picked them in?
public class GalleryHelper : IGalleryHelper
{
private List<(string, string, string)> _retval;
private nint _numberofImg = 0;
private nint _currentImg = 0;
public List<(string, string, string)> GetAllImgFromGallery()
{
_retval = new List<(string, string, string)>();
_currentImg = 0;
GetAllImg();
return _retval;
}
private void GetAllImg()
{
var fetchOptions = new PHFetchOptions();
PHFetchResult allPhotos = PHAsset.FetchAssets(PHAssetMediaType.Image, fetchOptions);
_numberofImg = allPhotos.Count;
Debug.WriteLine("Total img no + " + _numberofImg);
for (nint i = 0; i < allPhotos.Count; i++)
{
Debug.WriteLine("Starting " + i);
(allPhotos[i] as PHAsset).RequestContentEditingInput(new PHContentEditingInputRequestOptions(), CompletionHandler);
}
}
private void CompletionHandler(PHContentEditingInput contentEditingInput, NSDictionary requestStatusInfo)
{
Debug.WriteLine("Starting CompletionHandler " + (1 + _currentImg));
var path = contentEditingInput.FullSizeImageUrl.Path;
if (path != null)
{
var orientation = contentEditingInput.FullSizeImageOrientation;
switch (orientation)
{
case CIImageOrientation.TopLeft:
//Standard position
_retval.Add((path, null, "0"));
break;
case CIImageOrientation.LeftBottom:
//Rotate 90 degrees clockwise
_retval.Add((path, null, "-90"));
break;
case CIImageOrientation.RightTop:
//Rotate 90 degrees counterclockwise
_retval.Add((path, null, "90"));
break;
case CIImageOrientation.BottomRight:
//Rotate 180 degrees
_retval.Add((path, null, "180"));
break;
case CIImageOrientation.BottomLeft:
//Mirror image rotated 180 degrees
_retval.Add((path, null, "180"));
break;
case CIImageOrientation.TopRight:
//Mirror image
_retval.Add((path, null, "0"));
break;
case CIImageOrientation.LeftTop:
//Mirror image rotate 90 degrees clockwise
_retval.Add((path, null, "-90"));
break;
case CIImageOrientation.RightBottom:
//Mirror image rotate 90 degrees counterclockwise.
_retval.Add((path, null, "90"));
break;
default:
_retval.Add((path, null, "0"));
break;
}
}
_currentImg++;
Debug.WriteLine("Images done " + _currentImg);
MessagingCenter.Send((App)Xamarin.Forms.Application.Current, "ImagesReady", _retval);
}
}
A paste from my Debug Output on a run:
[0:] Total img no + 138
[0:] Starting 0
[0:] Starting 1
(...)
[0:] Starting 137
[0:] Starting CompletionHandler 1
[0:] Images done 1
[0:] Starting CompletionHandler 2
[0:] Images done 2
[0:] Starting CompletionHandler 3
[0:] Images done 3
(...)
[0:] Starting CompletionHandler 15
[0:] Images done 15
[0:] Starting CompletionHandler 16
[0:] Images done 16
[0:] Starting CompletionHandler 17
[0:] Images done 17
Thread started: #17
Thread finished: #15
The thread 0xf has exited with code 0 (0x0).
Thread finished: #3
c# xamarin.forms xamarin.ios photosframework
asked Nov 21 '18 at 12:06
rrrrrr
466
You can use the package MediaPlugin from Nuget. github.com/jamesmontemagno/MediaPlugin
– Lucas Zhang - MSFT
Nov 26 '18 at 8:06
And that is a very good plugin but it does not support picking multiple images...
– rrr
Nov 27 '18 at 9:04
add a comment |
I have a app where i need to pick images from the phone and display them in the order the user picked them
(i need img's in the order picked , not "most recent edited" that is why i am not using UIImagePickerController)
To do this i have a page that shows the latest 50 images with the possibility to load more.
I am getting the Image path and orientation with this code below.
My problem: The CompletionHandler (in RequestContentEditingInput) will only run 17 times...
I can see that the the RequestContentEditingInput is called for every image (on this phone 138 times)
I have tried to wait but nothing happens.
The code works as intended when i have less than 17 images...
I have tried to implement a SemaphoreSlim lock in the CompletionHandler code to control that i would only process 10 images at the time but the end result was ether the same or no images was processed at all.
UpdateInfo: It seems its all the LivePhotos that is not processed.
Do anyone have an idea on what is happening here?
An idea for a fix?
Is there another way i can get all image paths and orientation?
Or a totally other solution to let the user pick images from the phone and get the order the user picked them in?
public class GalleryHelper : IGalleryHelper
{
private List<(string, string, string)> _retval;
private nint _numberofImg = 0;
private nint _currentImg = 0;
public List<(string, string, string)> GetAllImgFromGallery()
{
_retval = new List<(string, string, string)>();
_currentImg = 0;
GetAllImg();
return _retval;
}
private void GetAllImg()
{
var fetchOptions = new PHFetchOptions();
PHFetchResult allPhotos = PHAsset.FetchAssets(PHAssetMediaType.Image, fetchOptions);
_numberofImg = allPhotos.Count;
Debug.WriteLine("Total img no + " + _numberofImg);
for (nint i = 0; i < allPhotos.Count; i++)
{
Debug.WriteLine("Starting " + i);
(allPhotos[i] as PHAsset).RequestContentEditingInput(new PHContentEditingInputRequestOptions(), CompletionHandler);
}
}
private void CompletionHandler(PHContentEditingInput contentEditingInput, NSDictionary requestStatusInfo)
{
Debug.WriteLine("Starting CompletionHandler " + (1 + _currentImg));
var path = contentEditingInput.FullSizeImageUrl.Path;
if (path != null)
{
var orientation = contentEditingInput.FullSizeImageOrientation;
switch (orientation)
{
case CIImageOrientation.TopLeft:
//Standard position
_retval.Add((path, null, "0"));
break;
case CIImageOrientation.LeftBottom:
//Rotate 90 degrees clockwise
_retval.Add((path, null, "-90"));
break;
case CIImageOrientation.RightTop:
//Rotate 90 degrees counterclockwise
_retval.Add((path, null, "90"));
break;
case CIImageOrientation.BottomRight:
//Rotate 180 degrees
_retval.Add((path, null, "180"));
break;
case CIImageOrientation.BottomLeft:
//Mirror image rotated 180 degrees
_retval.Add((path, null, "180"));
break;
case CIImageOrientation.TopRight:
//Mirror image
_retval.Add((path, null, "0"));
break;
case CIImageOrientation.LeftTop:
//Mirror image rotate 90 degrees clockwise
_retval.Add((path, null, "-90"));
break;
case CIImageOrientation.RightBottom:
//Mirror image rotate 90 degrees counterclockwise.
_retval.Add((path, null, "90"));
break;
default:
_retval.Add((path, null, "0"));
break;
}
}
_currentImg++;
Debug.WriteLine("Images done " + _currentImg);
MessagingCenter.Send((App)Xamarin.Forms.Application.Current, "ImagesReady", _retval);
}
}
A paste from my Debug Output on a run:
[0:] Total img no + 138
[0:] Starting 0
[0:] Starting 1
(...)
[0:] Starting 137
[0:] Starting CompletionHandler 1
[0:] Images done 1
[0:] Starting CompletionHandler 2
[0:] Images done 2
[0:] Starting CompletionHandler 3
[0:] Images done 3
(...)
[0:] Starting CompletionHandler 15
[0:] Images done 15
[0:] Starting CompletionHandler 16
[0:] Images done 16
[0:] Starting CompletionHandler 17
[0:] Images done 17
Thread started: #17
Thread finished: #15
The thread 0xf has exited with code 0 (0x0).
Thread finished: #3
c# xamarin.forms xamarin.ios photosframework
asked Nov 21 '18 at 12:06
rrrrrr
466
I have a app where i need to pick images from the phone and display them in the order the user picked them
(i need img's in the order picked , not "most recent edited" that is why i am not using UIImagePickerController)
To do this i have a page that shows the latest 50 images with the possibility to load more.
I am getting the Image path and orientation with this code below.
My problem: The CompletionHandler (in RequestContentEditingInput) will only run 17 times...
I can see that the the RequestContentEditingInput is called for every image (on this phone 138 times)
I have tried to wait but nothing happens.
The code works as intended when i have less than 17 images...
I have tried to implement a SemaphoreSlim lock in the CompletionHandler code to control that i would only process 10 images at the time but the end result was ether the same or no images was processed at all.
UpdateInfo: It seems its all the LivePhotos that is not processed.
Do anyone have an idea on what is happening here?
An idea for a fix?
Is there another way i can get all image paths and orientation?
Or a totally other solution to let the user pick images from the phone and get the order the user picked them in?
public class GalleryHelper : IGalleryHelper
{
private List<(string, string, string)> _retval;
private nint _numberofImg = 0;
private nint _currentImg = 0;
public List<(string, string, string)> GetAllImgFromGallery()
{
_retval = new List<(string, string, string)>();
_currentImg = 0;
GetAllImg();
return _retval;
}
private void GetAllImg()
{
var fetchOptions = new PHFetchOptions();
PHFetchResult allPhotos = PHAsset.FetchAssets(PHAssetMediaType.Image, fetchOptions);
_numberofImg = allPhotos.Count;
Debug.WriteLine("Total img no + " + _numberofImg);
for (nint i = 0; i < allPhotos.Count; i++)
{
Debug.WriteLine("Starting " + i);
(allPhotos[i] as PHAsset).RequestContentEditingInput(new PHContentEditingInputRequestOptions(), CompletionHandler);
}
}
private void CompletionHandler(PHContentEditingInput contentEditingInput, NSDictionary requestStatusInfo)
{
Debug.WriteLine("Starting CompletionHandler " + (1 + _currentImg));
var path = contentEditingInput.FullSizeImageUrl.Path;
if (path != null)
{
var orientation = contentEditingInput.FullSizeImageOrientation;
switch (orientation)
{
case CIImageOrientation.TopLeft:
//Standard position
_retval.Add((path, null, "0"));
break;
case CIImageOrientation.LeftBottom:
//Rotate 90 degrees clockwise
_retval.Add((path, null, "-90"));
break;
case CIImageOrientation.RightTop:
//Rotate 90 degrees counterclockwise
_retval.Add((path, null, "90"));
break;
case CIImageOrientation.BottomRight:
//Rotate 180 degrees
_retval.Add((path, null, "180"));
break;
case CIImageOrientation.BottomLeft:
//Mirror image rotated 180 degrees
_retval.Add((path, null, "180"));
break;
case CIImageOrientation.TopRight:
//Mirror image
_retval.Add((path, null, "0"));
break;
case CIImageOrientation.LeftTop:
//Mirror image rotate 90 degrees clockwise
_retval.Add((path, null, "-90"));
break;
case CIImageOrientation.RightBottom:
//Mirror image rotate 90 degrees counterclockwise.
_retval.Add((path, null, "90"));
break;
default:
_retval.Add((path, null, "0"));
break;
}
}
_currentImg++;
Debug.WriteLine("Images done " + _currentImg);
MessagingCenter.Send((App)Xamarin.Forms.Application.Current, "ImagesReady", _retval);
}
}
A paste from my Debug Output on a run:
[0:] Total img no + 138
[0:] Starting 0
[0:] Starting 1
(...)
[0:] Starting 137
[0:] Starting CompletionHandler 1
[0:] Images done 1
[0:] Starting CompletionHandler 2
[0:] Images done 2
[0:] Starting CompletionHandler 3
[0:] Images done 3
(...)
[0:] Starting CompletionHandler 15
[0:] Images done 15
[0:] Starting CompletionHandler 16
[0:] Images done 16
[0:] Starting CompletionHandler 17
[0:] Images done 17
Thread started: #17
Thread finished: #15
The thread 0xf has exited with code 0 (0x0).
Thread finished: #3
c# xamarin.forms xamarin.ios photosframework
c# xamarin.forms xamarin.ios photosframework
asked Nov 21 '18 at 12:06
rrrrrr
466
asked Nov 21 '18 at 12:06
rrrrrr
466
edited Nov 21 '18 at 15:48
rrr
asked Nov 21 '18 at 12:06
rrrrrr
466
asked Nov 21 '18 at 12:06
rrrrrr
466
asked Nov 21 '18 at 12:06
rrrrrr
466
466
You can use the package MediaPlugin from Nuget. github.com/jamesmontemagno/MediaPlugin
– Lucas Zhang - MSFT
Nov 26 '18 at 8:06
And that is a very good plugin but it does not support picking multiple images...
– rrr
Nov 27 '18 at 9:04
add a comment |
You can use the package MediaPlugin from Nuget. github.com/jamesmontemagno/MediaPlugin
– Lucas Zhang - MSFT
Nov 26 '18 at 8:06
And that is a very good plugin but it does not support picking multiple images...
– rrr
Nov 27 '18 at 9:04
You can use the package MediaPlugin from Nuget. github.com/jamesmontemagno/MediaPlugin
– Lucas Zhang - MSFT
Nov 26 '18 at 8:06
You can use the package MediaPlugin from Nuget. github.com/jamesmontemagno/MediaPlugin
– Lucas Zhang - MSFT
Nov 26 '18 at 8:06
And that is a very good plugin but it does not support picking multiple images...
– rrr
Nov 27 '18 at 9:04
And that is a very good plugin but it does not support picking multiple images...
– rrr
Nov 27 '18 at 9:04
add a comment |
1 Answer
1
active
oldest
votes
If anyone in the future has the same problem.
Use PHImageManager.DefaultManager.RequestImageData() instead of PHAsset.RequestContentEditingInput() as it do not crash if you ask it to process alot of images.
I do something like:
var fetchOptions = new PHFetchOptions();
PHFetchResult allPhotos = PHAsset.FetchAssets(PHAssetMediaType.Image, fetchOptions);
_numberofImg = allPhotos.Count;
Debug.WriteLine("Total img no + " + _numberofImg);
await Task.Yield();
await Task.Run(() => ImgProcess(allPhotos));
return true;
private void ImgProcess(PHFetchResult allPhotos)
{
//await Task.Run(() =>
//{
for (nint i = 0; i < allPhotos.Count; i++)
{
Debug.WriteLine("Starting " + i);
var phasset = allPhotos[i] as PHAsset;
var options = new PHImageRequestOptions()
{
Synchronous = true,
NetworkAccessAllowed = false,
DeliveryMode = PHImageRequestOptionsDeliveryMode.FastFormat
};
PHImageManager.DefaultManager.RequestImageData(phasset, options, ComplManager);
}
//});
//return;
}
even if this solution still have problems when the number of images get over something like 300...
answered Dec 3 '18 at 9:30
rrrrrr
466
add a comment |
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',
autoActivateHeartbeat: false,
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
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53411696%2frequestcontenteditinginput-completionhandler-do-not-run%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
If anyone in the future has the same problem.
Use PHImageManager.DefaultManager.RequestImageData() instead of PHAsset.RequestContentEditingInput() as it do not crash if you ask it to process alot of images.
I do something like:
var fetchOptions = new PHFetchOptions();
PHFetchResult allPhotos = PHAsset.FetchAssets(PHAssetMediaType.Image, fetchOptions);
_numberofImg = allPhotos.Count;
Debug.WriteLine("Total img no + " + _numberofImg);
await Task.Yield();
await Task.Run(() => ImgProcess(allPhotos));
return true;
private void ImgProcess(PHFetchResult allPhotos)
{
//await Task.Run(() =>
//{
for (nint i = 0; i < allPhotos.Count; i++)
{
Debug.WriteLine("Starting " + i);
var phasset = allPhotos[i] as PHAsset;
var options = new PHImageRequestOptions()
{
Synchronous = true,
NetworkAccessAllowed = false,
DeliveryMode = PHImageRequestOptionsDeliveryMode.FastFormat
};
PHImageManager.DefaultManager.RequestImageData(phasset, options, ComplManager);
}
//});
//return;
}
even if this solution still have problems when the number of images get over something like 300...
answered Dec 3 '18 at 9:30
rrrrrr
466
add a comment |
If anyone in the future has the same problem.
Use PHImageManager.DefaultManager.RequestImageData() instead of PHAsset.RequestContentEditingInput() as it do not crash if you ask it to process alot of images.
I do something like:
var fetchOptions = new PHFetchOptions();
PHFetchResult allPhotos = PHAsset.FetchAssets(PHAssetMediaType.Image, fetchOptions);
_numberofImg = allPhotos.Count;
Debug.WriteLine("Total img no + " + _numberofImg);
await Task.Yield();
await Task.Run(() => ImgProcess(allPhotos));
return true;
private void ImgProcess(PHFetchResult allPhotos)
{
//await Task.Run(() =>
//{
for (nint i = 0; i < allPhotos.Count; i++)
{
Debug.WriteLine("Starting " + i);
var phasset = allPhotos[i] as PHAsset;
var options = new PHImageRequestOptions()
{
Synchronous = true,
NetworkAccessAllowed = false,
DeliveryMode = PHImageRequestOptionsDeliveryMode.FastFormat
};
PHImageManager.DefaultManager.RequestImageData(phasset, options, ComplManager);
}
//});
//return;
}
even if this solution still have problems when the number of images get over something like 300...
answered Dec 3 '18 at 9:30
rrrrrr
466
add a comment |
If anyone in the future has the same problem.
Use PHImageManager.DefaultManager.RequestImageData() instead of PHAsset.RequestContentEditingInput() as it do not crash if you ask it to process alot of images.
I do something like:
var fetchOptions = new PHFetchOptions();
PHFetchResult allPhotos = PHAsset.FetchAssets(PHAssetMediaType.Image, fetchOptions);
_numberofImg = allPhotos.Count;
Debug.WriteLine("Total img no + " + _numberofImg);
await Task.Yield();
await Task.Run(() => ImgProcess(allPhotos));
return true;
private void ImgProcess(PHFetchResult allPhotos)
{
//await Task.Run(() =>
//{
for (nint i = 0; i < allPhotos.Count; i++)
{
Debug.WriteLine("Starting " + i);
var phasset = allPhotos[i] as PHAsset;
var options = new PHImageRequestOptions()
{
Synchronous = true,
NetworkAccessAllowed = false,
DeliveryMode = PHImageRequestOptionsDeliveryMode.FastFormat
};
PHImageManager.DefaultManager.RequestImageData(phasset, options, ComplManager);
}
//});
//return;
}
even if this solution still have problems when the number of images get over something like 300...
answered Dec 3 '18 at 9:30
rrrrrr
466
If anyone in the future has the same problem.
Use PHImageManager.DefaultManager.RequestImageData() instead of PHAsset.RequestContentEditingInput() as it do not crash if you ask it to process alot of images.
I do something like:
var fetchOptions = new PHFetchOptions();
PHFetchResult allPhotos = PHAsset.FetchAssets(PHAssetMediaType.Image, fetchOptions);
_numberofImg = allPhotos.Count;
Debug.WriteLine("Total img no + " + _numberofImg);
await Task.Yield();
await Task.Run(() => ImgProcess(allPhotos));
return true;
private void ImgProcess(PHFetchResult allPhotos)
{
//await Task.Run(() =>
//{
for (nint i = 0; i < allPhotos.Count; i++)
{
Debug.WriteLine("Starting " + i);
var phasset = allPhotos[i] as PHAsset;
var options = new PHImageRequestOptions()
{
Synchronous = true,
NetworkAccessAllowed = false,
DeliveryMode = PHImageRequestOptionsDeliveryMode.FastFormat
};
PHImageManager.DefaultManager.RequestImageData(phasset, options, ComplManager);
}
//});
//return;
}
even if this solution still have problems when the number of images get over something like 300...
answered Dec 3 '18 at 9:30
rrrrrr
466
answered Dec 3 '18 at 9:30
rrrrrr
466
answered Dec 3 '18 at 9:30
rrrrrr
466
answered Dec 3 '18 at 9:30
rrrrrr
466
466
add a comment |
add a comment |
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53411696%2frequestcontenteditinginput-completionhandler-do-not-run%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
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
You can use the package MediaPlugin from Nuget. github.com/jamesmontemagno/MediaPlugin
– Lucas Zhang - MSFT
Nov 26 '18 at 8:06
And that is a very good plugin but it does not support picking multiple images...
– rrr
Nov 27 '18 at 9:04