PHCacheImageManager.requestAVAsset(forVideo:...) returns nil AVAsset
It looks like I was trying to request video assets that were stored in iCloud without setting the video request options to allow network access.
When requesting the video from the PHCachingImageManager, I failed to pass any PHVideoRequestOptions object. Adding the lines below just prior to requesting the asset fixes this.
let options = PHVideoRequestOptions()options.isNetworkAccessAllowed = trueI found this thread on an open source image picker using the Photos framework. The videos I was testing with were indeed in iCloud which caused my returned asset to be nil. The linked thread also has a good example of hooking up a progress handler in objective C:
options.networkAccessAllowed = YES;options.progressHandler = ^(double progress, NSError *error, BOOL *stop, NSDictionary *info){...};