Called when a friend completes a challenge that was sent to them by the player.
- iOS 7.0+
- macOS 10.10+
- Mac Catalyst 13.0+Beta
- tvOS 9.0+
The player who originally sent the challenge.
The challenge that was created and sent.
The player that completed 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.