title: ALAssetsLibrary addAssetsGroupAlbumWithName is not working on iOS 9
body: <p>I need to add group with name "MyGroupName" in ALAssetsLibrary . So I have used below code. </p>
  
  <pre><code> ALAssetsLibrary * library = [[ALAssetsLibrary alloc] init];
      __weak ALAssetsLibrary *lib = library;
  [library addAssetsGroupAlbumWithName:@"MyGroupName" resultBlock:^(ALAssetsGroup *group) {
  
          [lib enumerateGroupsWithTypes:ALAssetsGroupAlbum
                             usingBlock:^(ALAssetsGroup *g, BOOL *stop)
           {
               if ([[g valueForProperty:ALAssetsGroupPropertyName] isEqualToString:@"MyGroupName"]) {
                   NSLog(@"group created with name 'MyGroupName'");
               }
           }failureBlock:^(NSError *error){
               NSLog(@"failure %@",error);
  
           }
           ];
  
      } failureBlock:^(NSError *error) {
          NSLog(@"failure %@",error);
      }];
  </code></pre>
  
  <p>but inside "enumerateGroupsWithTypes" , group "g" is always nil in iOS 9.3.1 (iphone 6). its working correctly and group created with name "MyGroupName" on iOS 9.3.1 iphone 5. I want to know why above code is not working on iphone 6 and is there any solution to make it work ? </p>
  
  <p>Please help me. Thanks in advance</p>