Check given PHAsset is iCloud asset?

Question

I\'m trying to get PhAsset object. I want to segregate iCloud assets. Here is my code,

PHFetchResult *cloudAlbums = [PHAssetCollection fetchAssetCollectionsWithT         


        

Answer 1

Following is a method you can implement to acquire all videos in the Videos folder of the Photos app, which uses a predicate with the PHFetchRequest to filter only videos stored on the iPhone itself, and not in iCloud:

// Collect all videos in the Videos folder of the Photos app
- (PHFetchResult *)assetsFetchResults {
    __block PHFetchResult *i = self->_assetsFetchResults;
    if (!i) {
        static dispatch_once_t onceToken;
        dispatch_once(&onceToken, ^{
            PHFetchOptions *fetchOptions = [PHFetchOptions new];
            fetchOptions.predicate = [NSPredicate predicateWithFormat:@"(sourceType & %d) != 0", PHAssetSourceTypeUserLibrary];
            PHFetchResult *smartAlbums = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeSmartAlbum subtype:PHAssetCollectionSubtypeSmartAlbumVideos options:fetchOptions];
            PHAssetCollection *collection = smartAlbums.firstObject;
            if (![collection isKindOfClass:[PHAssetCollection class]]) collection = nil;
            PHFetchOptions *allPhotosOptions = [[PHFetchOptions alloc] init];
            allPhotosOptions.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"creationDate" ascending:NO]];
            i = [PHAsset fetchAssetsInAssetCollection:collection options:allPhotosOptions];
            self->_assetsFetchResults = i;
        });
    }

    return i;
}

Apple's documentation on PHFetchResult states that only a subset of attributes can be used with a predicate; so, if the above code does not work for you, remove the PHFetchOptions predicate, and replace the corresponding reference in the PHFetchRequest to nil:

// Collect all videos in the Videos folder of the Photos app
- (PHFetchResult *)assetsFetchResults {
    __block PHFetchResult *i = self->_assetsFetchResults;
    if (!i) {
        static dispatch_once_t onceToken;
        dispatch_once(&onceToken, ^{
            PHFetchResult *smartAlbums = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeSmartAlbum subtype:PHAssetCollectionSubtypeSmartAlbumVideos options:nil];
            PHAssetCollection *collection = smartAlbums.firstObject;
            if (![collection isKindOfClass:[PHAssetCollection class]]) collection = nil;
            PHFetchOptions *allPhotosOptions = [[PHFetchOptions alloc] init];
            allPhotosOptions.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"creationDate" ascending:NO]];
            i = [PHAsset fetchAssetsInAssetCollection:collection options:allPhotosOptions];
            self->_assetsFetchResults = i;
        });
    }

    return i;
}

Then, add this line:

// Filter videos that are stored in iCloud
- (NSArray *)phAssets {
    NSMutableArray *assets = [NSMutableArray arrayWithCapacity:self.assetsFetchResults.count];
    [[self assetsFetchResults] enumerateObjectsUsingBlock:^(PHAsset *asset, NSUInteger idx, BOOL *stop) {
        if (asset.sourceType == PHAssetSourceTypeUserLibrary)
                 [assets addObject:asset];
     }];

    return [NSArray arrayWithArray:(NSArray *)assets];
}