How do i get only the videos using ALAssetsLibrary

alassetslibrary, ios

Solution

You need to add an ALAssetsFilter to the group during enumeration. Here's a basic example:

ALAssetsLibrary* library = [[ALAssetsLibrary alloc] init];

[library enumerateGroupsWithTypes:ALAssetsGroupAll usingBlock:^(ALAssetsGroup *group, BOOL *stop) {
    if (group) {
        [group setAssetsFilter:[ALAssetsFilter allVideos]];
        [group enumerateAssetsUsingBlock:^(ALAsset *asset, NSUInteger index, BOOL *stop){
            if (asset){

                NSDictionary *meta = [[asset defaultRepresentation] metadata];

            }
        }];
    }
} failureBlock:^(NSError *error) {
    NSLog(@"error enumerating AssetLibrary groups %@\n", error);
}];

For future reference, the available filters are:

- allPhotos
- allVideos
- allAssets

Problem

I am trying to get videos present from the photo library from the following piece of code.But i also get images list.How do i get list of all videos? what am i doing wrong? ``` NSMutableArray* assetURLDictionaries = [[NSMutableArray alloc] init]; xy =[[NSMutableArray alloc]init]; ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init]; void (^assetEnumerator)( ALAsset *, NSUInteger, BOOL *) = ^(ALAsset *result, NSUInteger index, BOOL *stop) { if(result != nil) { if([[result valueForProperty:ALAssetPropertyType] isEqualToString:ALAssetTypeVideo]) { [assetURLDictionaries addObject:[result valueForProperty:ALAssetPropertyURLs]]; NSLog(@"result is:%@",result); NSLog(@"asset URLDictionary is:%@",assetURLDictionaries); NSURL *url= (NSURL*) [[result defaultRepresentation]url]; [library assetForURL:url resultBlock:^(ALAsset *asset) { [xy addObject:[UIImage imageWithCGImage:[[asset defaultRepresentation] fullScreenImage]]]; NSLog(@" xy is:%@",xy); image =[ [UIImageView alloc ] initWithImage:[xy objectAtIndex:0]]; NSLog(@"image is:%@",image); } failureBlock:^(NSError *error){ NSLog(@"test:Fail"); } ]; } } }; NSMutableArray *assetGroups = [[NSMutableArray alloc] init]; void (^ assetGroupEnumerator) ( ALAssetsGroup *, BOOL *)= ^(ALAssetsGroup *group, BOOL *stop) { NSLog(@"hello"); if(group != nil) { [group enumerateAssetsUsingBlock:assetEnumerator]; [assetGroups addObject:group]; NSLog(@"Number of assets in group :%d",[group numberOfAssets]); NSLog(@"asset group is:%@",assetGroups); } }; assetGroups = [[NSMutableArray alloc] init]; [library enumerateGroupsWithTypes:ALAssetsGroupAll usingBlock:assetGroupEnumerator failureBlock:^(NSError *error) {NSLog(@"A problem occurred");}]; ```

Original source