Apple Game Frameworks and Technologies

Process Player Turns Using an Event Listener

The GKTurnBasedEventListener protocol takes care of exchanges and match-related events for turn-based games; however, you don’t implement this protocol directly. Instead, you implement the GKLocalPlayerListener protocol, which inherits methods from the GKTurnBasedEventListener protocol. One of those methods is player(_:receivedTurnEventFor:didBecomeActive:).

The player(_:receivedTurnEventFor:didBecomeActive:) method gets called when it’s the local player’s turn. This method also gets called when:

• The current player’s turn time-out is about to expire.
• The player accepts an invite from another player.
• The player’s turn was passed to another player.
• The match data is saved by another player.
• The player receives ...