Called when the player completes a challenge that was issued by a friend.
- iOS 7.0+
- macOS 10.10+
- Mac Catalyst 13.0+
- tvOS 9.0+
The player who completed the challenge.
The challenge the player completed.
The friend who originally sent the challenge.
This method is triggered when the game is running or when the user has tapped a challenge notification banner outside of the game.