Get all Images from Live Photo - objective-c

Question

I want to get a NSArray with all the UIImage from a Live Photo to create a GIF of that. I tried to make screenshots while animating the live photo but it doesn't work.
Can anyone help me?
Thanks!

Answer 1

First step, you need convert a Live Photo to Video, using this:
PHAssetResourceManager.defaultManager().writeDataForAssetResource(assetRes,
toFile: fileURL, options: nil, completionHandler:
{
// Video file has been written to path specified via fileURL
}
Finally, using this library to convert this to GIF, or you can search in google for another way: https://github.com/NSRare/NSGIF
Hope this will help you.

Answer 2

This is what I did to achieve the same thing as you requested.
PHFetchOptions *options = [[PHFetchOptions alloc] init];
options.sortDescriptors = #[[NSSortDescriptor sortDescriptorWithKey:#"creationDate" ascending:NO]];
options.predicate = [NSPredicate predicateWithFormat:#"mediaType == %d", PHAssetMediaTypeImage];
options.predicate = [NSPredicate predicateWithFormat:#"mediaSubtype == %d", PHAssetMediaSubtypePhotoLive];
options.includeAllBurstAssets = NO;
PHFetchResult *allLivePhotos = [PHAsset fetchAssetsWithOptions:options];
NSLog(#"Get total live count : %ld",(unsigned long)allLivePhotos.count);
NSMutableArray *arrAllLiveImagesGroups = [NSMutableArray array];
for (PHAsset *asset in allLivePhotos) {
[asset requestContentEditingInputWithOptions:nil
completionHandler:^(PHContentEditingInput *contentEditingInput, NSDictionary *info) {
NSURL *urlMov = [contentEditingInput.livePhoto valueForKey:#"videoURL"];
NSMutableArray *arrLive = [NSMutableArray array];
NSMutableArray *arrSingleLiveImagesGroup = [NSMutableArray array];
AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:urlMov options:nil];
AVAssetImageGenerator *generator = [[AVAssetImageGenerator alloc] initWithAsset:asset];
generator.requestedTimeToleranceAfter = kCMTimeZero;
generator.requestedTimeToleranceBefore = kCMTimeZero;
for (Float64 i = 0; i < CMTimeGetSeconds(asset.duration) * 5 ; i++){
#autoreleasepool {
CMTime time = CMTimeMake(i, 5);
NSError *err;
CMTime actualTime;
CGImageRef image = [generator copyCGImageAtTime:time actualTime:&actualTime error:&err];
UIImage *generatedImage = [[UIImage alloc] initWithCGImage:image scale:1.0 orientation:UIImageOrientationDown];
[arrLive addObject:generatedImage];
CGImageRelease(image);
}
}
[arrSingleLiveImagesGroup addObject:arrLive];
[arrAllLiveImagesGroups addObject:arrSingleLiveImagesGroup];
}];
}