PHImageManager.default().requestAVAsset for video - swift3

Question

i have an big problem with my situation
my main problem is i need fetch video one by one do some operation on the video name and save it to the file system and again fetch another video do some operation on the video name and save it to the file system through the loop of asset the problem is completion handler prevent me do that because it saving all videos together without i do any editing and changing the name this save all videos i think it is working on background thread please any help to fix this problem i need handle fetch video one by one
this is my code
for asset in arrayOfAssets {
if asset.mediaType == .video {
PHImageManager.default().requestAVAsset(forVideo: asset, options: nil, resultHandler: { (AVAsset, AVAudio, info) in
// i need access to this place so i can fetch the video one by one and working with the AVAsset
})
}else{
let imageOp = PHImageRequestOptions()
PHImageManager.default().requestImage(for: asset, targetSize: CGSize(width:125,height:125), contentMode: .aspectFit, options: imageOp, resultHandler: { (img, info) in
print(img!)
})
}
}

Answer 1

i think this one is related to your query
for Vedios
How Can i Get the List of all Video files from Library in ios sdk
for Images
Get all of the pictures from an iPhone photoLibrary in an array using AssetsLibrary framework?
allVideos = [[NSMutableArray alloc] init];
ALAssetsLibrary *assetLibrary = [[ALAssetsLibrary alloc] init];
[assetLibrary enumerateGroupsWithTypes:ALAssetsGroupAll usingBlock:^(ALAssetsGroup *group, BOOL *stop)
{
if (group)
{
[group setAssetsFilter:[ALAssetsFilter allVideos]];
[group enumerateAssetsUsingBlock:^(ALAsset *asset, NSUInteger index, BOOL *stop)
{
if (asset)
{
dic = [[NSMutableDictionary alloc] init];
ALAssetRepresentation *defaultRepresentation = [asset defaultRepresentation];
NSString *uti = [defaultRepresentation UTI];
NSURL *videoURL = [[asset valueForProperty:ALAssetPropertyURLs] valueForKey:uti];
NSString *title = [NSString stringWithFormat:#"video %d", arc4random()%100];
UIImage *image = [self imageFromVideoURL:videoURL];
[dic setValue:image forKey:#"image"];
[dic setValue:title forKey:#"name"];
[dic setValue:videoURL forKey:#"url"];
[`allVideos` addObject:dic];
}
}];
else
{
}
}
failureBlock:^(NSError *error)
{
NSLog(#"error enumerating AssetLibrary groups %#\n", error);
}];
--------for ALL PHOTOS
NSArray *imageArray;
NSMutableArray *mutableArray;
-(void)getAllPhotosFromCamera
{
imageArray=[[NSArray alloc] init];
mutableArray =[[NSMutableArray alloc]init];
PHImageRequestOptions *requestOptions = [[PHImageRequestOptions alloc] init];
requestOptions.resizeMode = PHImageRequestOptionsResizeModeExact;
requestOptions.deliveryMode = PHImageRequestOptionsDeliveryModeHighQualityFormat;
requestOptions.synchronous = true;
PHFetchResult *result = [PHAsset fetchAssetsWithMediaType:PHAssetMediaTypeImage options:nil];
NSLog(#"%d",(int)result.count);
PHImageManager *manager = [PHImageManager defaultManager];
NSMutableArray *images = [NSMutableArray arrayWithCapacity:[result count]];
// assets contains PHAsset objects.
__block UIImage *ima;
for (PHAsset *asset in result) {
// Do something with the asset
[manager requestImageForAsset:asset
targetSize:PHImageManagerMaximumSize
contentMode:PHImageContentModeDefault
options:requestOptions
resultHandler:^void(UIImage *image, NSDictionary *info) {
ima = image;
[images addObject:ima];
}];
}
imageArray = [images copy]; // You can direct use NSMutuable Array images
}