Load the image associated with the leaderboard set.
- iOS 7.0+
- macOS 10.10+
A block that is called when the categories have been retrieved from the server.
The block receives the following parameters:
The image associated with the leaderboard set. If an error occurred, this value will be non-
nil. In this case, the array holds whatever data Game Kit was able to download before the error occurred.
If an error occurred, this error object describes the error. If the operation completed successfully, the value is
When this method is called, it creates a new background task to handle the request. The method then returns control to your game. Later, when the task is complete, Game Kit calls your completion handler. The completion handler is always called on the main thread.