Multiple images not getting saved in Photo Library by using UIActivityViewController

I need to save multiple images in the photo library, the user can multiple selects the images from the app gallery then can save them in iPhone Photo Gallery. I am showing the UIActivityViewController for the purpose.

Suppose a user selects 10 or more images and choose to save them into photo library then only 7-8 images are saved.

Is there any way by which i can save array of images in the photo library without any failure ?

Thanks

let images = Generic.fetchImagesFromMediaFiles(self.selectedMediaObj) // to fetch selected images  let activityViewController = UIActivityViewController(activityItems: images, applicationActivities: nil) self.present(activityViewController, animated: true, completion: nil);  if let popoverPresentationController = activityViewController.popoverPresentationController {     popoverPresentationController.sourceView = self.shareAllView } 

2 Answers

Answers 1

iOS system write photo save to album use single thread, one by one to do. if you want to save more photos same time, it maybe loss some data.

-(void)saveBtn { [SSGOTools againRequestPhotoWithblock:^(BOOL isAgree) { if (isAgree) {  self.listOfImages = [NSMutableArray new]; int photoNum ; photoNum = (int)_photoArray.count; if (_photoArray.count > 9) { photoNum = 9; } for (int i = 0; i < photoNum; i++) { NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:_photoArray[i]]]; UIImage *myImage = [UIImage imageWithData:data]; //[self.listOfImages addObject:myImage]; [self loadImageFinished:myImage];  } } }]; }  - (void)loadImageFinished:(UIImage *)image { [[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{  //write photo save to album  [PHAssetChangeRequest creationRequestForAssetFromImage:image];  } completionHandler:^(BOOL success, NSError * _Nullable error) {  NSLog(@"success = %d, error = %@", success, error); if(success){ dispatch_async(dispatch_get_main_queue(), ^{ [SSGOTools showInfoPopHint:@"Success"]; }); } }]; } 

Answers 2

you will need to use the completion block here for ensuring all images are saved.. try this :

-(void)saveBtn{ [SSGOTools againRequestPhotoWithblock:^(BOOL isAgree) {     if (isAgree) {         self.listOfImages = [NSMutableArray new];         int photoNum ;         photoNum = (int)_photoArray.count;         if (_photoArray.count > 9) {             photoNum = 9;         }         for (int i = 0; i < photoNum; i++) {             NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:_photoArray[i]]];             UIImage *myImage = [UIImage imageWithData:data];             [self.listOfImages addObject:myImage];            // [self loadImageFinished:myImage];         }        [self saveAllImages:self.listOfImages];     } }]; } -(void)saveAllImages:(NSMutableArray *)images { UIImage *image = [images firstObject]; [images removeObject:image];  [self loadImageFinished:image :^(bool success) {      if (success){          if (images.count > 0){             [self saveAllImages:images];         }else{             // all images saved do whatever you want;         }      }else{         NSLog(@"failed saving image");     }  }]; } - (void)loadImageFinished:(UIImage *)image :(void(^)(bool success))completion{ [[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{      //write photo save to album      [PHAssetChangeRequest creationRequestForAssetFromImage:image];  } completionHandler:^(BOOL success, NSError * _Nullable error) {      NSLog(@"success = %d, error = %@", success, error);     if(success){         dispatch_async(dispatch_get_main_queue(), ^{             [SSGOTools showInfoPopHint:@"Success"];         });     }     completion(success); }]; } 

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2. TransitionFlipFromBottom
3. TransitionFlipFromLeft
4. TransitionFlipFromRight
5. TransitionCurlUp
6. TransitionCurlDown
7. TransitionCrossDissolve
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But how to apply these transition animations while making a video from an UIImage array? I have searched a lot but didn't find anything.

I've also tried HJImagesToVideo but it offers only Crossfade transition .

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Here is the code :

//Capture the image UIGraphicsBeginImageContextWithOptions(self.captureView.bounds.size, false, UIScreen.main.scale) self.captureView.layer.render(in: UIGraphicsGetCurrentContext()!) let image = UIGraphicsGetImageFromCurrentImageContext() UIGraphicsEndImageContext()  let watermarkVideo = WatermakVideo()  //video file let videoFile = Bundle.main.path(forResource: "videoTrim", ofType: "mp4") let videoURL = URL(fileURLWithPath: videoFile!)  let imageFrame = captureView.frame watermarkVideo.createWatermark(image, frame: imageFrame, video: videoURL) 

Here is the class WatermakVideo : https://www.dropbox.com/s/0d6i7ap9qu4klp5/WatermakVideo.zip

I would be grateful if you could help me fix this issue.

1 Answers

Answers 1

Copy the below into your file. I had the same issue and solved the problem two weeks ago:

-(void)forStackOverflow:(NSURL*)url{ AVURLAsset* videoAsset = [[AVURLAsset alloc]initWithURL:url options:nil];     AVMutableComposition* mixComposition = [AVMutableComposition composition];      AVMutableCompositionTrack *compositionVideoTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];     AVAssetTrack *clipVideoTrack = [[videoAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];     AVMutableCompositionTrack *compositionAudioTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];     AVAssetTrack *clipAudioTrack = [[videoAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0];     //If you need audio as well add the Asset Track for audio here      [compositionVideoTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, videoAsset.duration) ofTrack:clipVideoTrack atTime:kCMTimeZero error:nil];     [compositionAudioTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, videoAsset.duration) ofTrack:clipAudioTrack atTime:kCMTimeZero error:nil]; 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I am trying CIFilter and GPUImage filter to apply various effects (brightness, contrast, saturation, etc.) on an image, but I'm struggling, would need an enhancement like the one shown below:

Before Enhancement filter

After Enhancement filter

CIFilter code that I tried:

NSDictionary *options = @{ CIDetectorImageOrientation :                                [[resultImage properties] valueForKey:kCGImagePropertyOrientation] }; NSArray *adjustments = [resultImage autoAdjustmentFiltersWithOptions:options]; for (CIFilter *filter in adjustments) {     [filter setValue:resultImage forKey:kCIInputImageKey];     resultImage = filter.outputImage; } 

GPUImage Filter:

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1 Answers

Answers 1

//Hope this helps , its in swift 3 :

        var aCIImage = CIImage();         var contrastFilter: CIFilter!;         var brightnessFilter: CIFilter!;         var gaussianBlurFilter: CIFilter!;         var pointFilter: CIFilter!;         var vignettFilter : CIFilter!;         var context = CIContext();         var outputImage = CIImage();         var newUIImage = UIImage();         var finalImage = UIImage()         DispatchQueue.main.async                         {                             self.gaussianBlurFilter = CIFilter(name: "CIExposureAdjust");                             self.gaussianBlurFilter.setValue(self.aCIImage, forKey: "inputImage")                              self.gaussianBlurFilter.setValue(NSNumber(value: sender.value), forKey: "inputEV");                              self.outputImage = self.gaussianBlurFilter.outputImage!;                              let imageRef = self.context.createCGImage(self.outputImage, from: self.outputImage.extent)                              self.newUIImage = UIImage(cgImage: imageRef!)                             self.testView?.image = self.newUIImage;                     }    //  

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I am using 3rd party library for image processing, this method seems to be the cause of large memory usage (+30MB) everytime it executed, and it won't release properly. Repeated use of it ends up crashing the app (memory overload).

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I suspect the problem is here: (__bridge CFDataRef)data. I cant use CFRelease on it cause it make app crash. Project is running with ARC.

EDIT:

It seems the same code is also in openCV official website: http://docs.opencv.org/2.4/doc/tutorials/ios/image_manipulation/image_manipulation.html

Gah!

EDIT 2 Here is the code how I use it (actually below code is also a part of the 3rd party lib, but i added some lines).

 cv::Mat undistorted = cv::Mat( cvSize(maxWidth,maxHeight), CV_8UC4); // here nothing         cv::Mat original = [MMOpenCVHelper cvMatFromUIImage:_adjustedImage]; // here +30MB          //NSLog(@"%f %f %f %f",ptBottomLeft.x,ptBottomRight.x,ptTopRight.x,ptTopLeft.x);         cv::warpPerspective(original, undistorted,                             cv::getPerspectiveTransform(src, dst), cvSize(maxWidth, maxHeight)); // here +16MB (PROBLEM)            _cropRect.hidden=YES;          @autoreleasepool {             _sourceImageView.image=[MMOpenCVHelper UIImageFromCVMat:undistorted]; // here +15MB (PROBLEM)         }                   original.release(); // here -30MB (THIS IS OK)         undistorted.release(); // here nothing 

0 Answers

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However, when cropping the image, it seems as though you cannot move it to the top and bottom of a (portrait) image (left and right if landscape).

I have tried searching but there doesn't seem to be much information, but it seems like a massive issue.

Can someone help?

This is the very small amount of code I'm using:

let imagePicker = UIImagePickerController()  imagePicker.allowsEditing = true imagePicker.sourceType = UIImagePickerControllerSourceType.camera  present(imagePicker, animated: true, completion: nil) 

There's obviously more code but this is the main part.

EDIT with photo:

So I want to be able to move the photo around/zoom in to select any square portion to save. However, I cannot move it from this position/ keeps snapping back.

I can zoom in, but it still restricts me from the top and bottom edges.

Again, it works with the photoLibrary.

3 Answers

Answers 1

This is a bug that was introduced in iOS 6 and hasn't been fixed yet.

A radar was raised in 2012 for this but closed by Apple. I managed to get it opened again and have been pestering Apple devs in my contacts for the past 6 months.

http://openradar.appspot.com/12318774

Until this is fixed by Apple the only option is to use a third party control or do it yourself.

Here is the radar I opened...

http://openradar.appspot.com/28260087

Answers 2

I know you said it already zooms but you may just need to adjust the bounds for that.

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {     image.image = info[UIImagePickerControllerEditedImage] as? UIImage     self.dismiss(animated: true, completion: nil) } 

You may also need to use CGRect to set the image correctly in the screen. It should be centered. If you are using and iphone 5 the dimensions 640 x 1136.

This happens because the width or the height of the image gets maxed out to the screen.

Answers 3

I have used the solution provided at below link:-

https://github.com/Hipo/HIPImageCropper

It handles the landscape and potrait allignment of the image and provides zoom in and zoom out with crop functionality.

Hope this helps.

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How can I update the NSTextAttachment once it has already been rendered by the UITextView?

Thanks!

1 Answers

Answers 1

You must always update the user interface from the main thread, not from the socket thread.

Here is a Swift example:

// Update UI from main thread dispatch_async(dispatch_get_main_queue(), {   textAttachment.image = image })

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