GameKit iOS 11.4 to 12.0 API Differences

GKCloudPlayer.h

	Availability	Deprecation Message
From	Available	none
To	Deprecated	GKGameSession is deprecated. Use GKPlayer for both real-time and turn-based matchmaking APIs.

GKFriendRequestComposeViewController.h

Modified GKFriendRequestComposeViewController.composeViewDelegate

	Availability
From	Available
To	Deprecated

Modified GKFriendRequestComposeViewControllerDelegate

	Availability
From	Available
To	Deprecated

GKGameSession.h

Modified GKGameSession

	Availability	Deprecation Message
From	Available	none
To	Deprecated	For real-time matches, use GKMatchmakerViewController. For turn-based matches, use GKTurnBasedMatchmakerViewController.

GKGameSessionError.h

Modified GKGameSessionErrorDomain

	Availability	Deprecation Message
From	Available	none
To	Deprecated	GKGameSession is deprecated, use real-time and turn-based matchmaking APIs instead.

Modified GKGameSessionErrorUnknown

	Availability	Deprecation Message
From	Available	none
To	Deprecated	GKGameSession is deprecated, use real-time and turn-based matchmaking APIs instead.

Modified GKGameSessionErrorNotAuthenticated

	Availability	Deprecation Message
From	Available	none
To	Deprecated	GKGameSession is deprecated, use real-time and turn-based matchmaking APIs instead.

Modified GKGameSessionErrorSessionConflict

	Availability	Deprecation Message
From	Available	none
To	Deprecated	GKGameSession is deprecated, use real-time and turn-based matchmaking APIs instead.

Modified GKGameSessionErrorSessionNotShared

	Availability	Deprecation Message
From	Available	none
To	Deprecated	GKGameSession is deprecated, use real-time and turn-based matchmaking APIs instead.

Modified GKGameSessionErrorConnectionCancelledByUser

	Availability	Deprecation Message
From	Available	none
To	Deprecated	GKGameSession is deprecated, use real-time and turn-based matchmaking APIs instead.

Modified GKGameSessionErrorConnectionFailed

	Availability	Deprecation Message
From	Available	none
To	Deprecated	GKGameSession is deprecated, use real-time and turn-based matchmaking APIs instead.

Modified GKGameSessionErrorSessionHasMaxConnectedPlayers

	Availability	Deprecation Message
From	Available	none
To	Deprecated	GKGameSession is deprecated, use real-time and turn-based matchmaking APIs instead.

Modified GKGameSessionErrorSendDataNotConnected

	Availability	Deprecation Message
From	Available	none
To	Deprecated	GKGameSession is deprecated, use real-time and turn-based matchmaking APIs instead.

Modified GKGameSessionErrorSendDataNoRecipients

	Availability	Deprecation Message
From	Available	none
To	Deprecated	GKGameSession is deprecated, use real-time and turn-based matchmaking APIs instead.

Modified GKGameSessionErrorSendDataNotReachable

	Availability	Deprecation Message
From	Available	none
To	Deprecated	GKGameSession is deprecated, use real-time and turn-based matchmaking APIs instead.

Modified GKGameSessionErrorSendRateLimitReached

	Availability	Deprecation Message
From	Available	none
To	Deprecated	GKGameSession is deprecated, use real-time and turn-based matchmaking APIs instead.

Modified GKGameSessionErrorBadContainer

	Availability	Deprecation Message
From	Available	none
To	Deprecated	GKGameSession is deprecated, use real-time and turn-based matchmaking APIs instead.

Modified GKGameSessionErrorCloudQuotaExceeded

	Availability	Deprecation Message
From	Available	none
To	Deprecated	GKGameSession is deprecated, use real-time and turn-based matchmaking APIs instead.

Modified GKGameSessionErrorNetworkFailure

	Availability	Deprecation Message
From	Available	none
To	Deprecated	GKGameSession is deprecated, use real-time and turn-based matchmaking APIs instead.

Modified GKGameSessionErrorCloudDriveDisabled

	Availability	Deprecation Message
From	Available	none
To	Deprecated	GKGameSession is deprecated, use real-time and turn-based matchmaking APIs instead.

Modified GKGameSessionErrorInvalidSession

	Availability	Deprecation Message
From	Available	none
To	Deprecated	GKGameSession is deprecated, use real-time and turn-based matchmaking APIs instead.

GKGameSessionEventListener.h

Modified GKGameSessionEventListener

	Availability	Deprecation Message
From	Available	none
To	Deprecated	Use GKLocalPlayerListener for multiplayer event notifications.

Modified +[GKGameSession addEventListener:]

	Availability	Deprecation Message
From	Available	none
To	Deprecated	Use GKLocalPlayer's registerListener: to register for GKLocalPlayerListener event notifications.

Modified +[GKGameSession removeEventListener:]

	Availability	Deprecation Message
From	Available	none
To	Deprecated	Use GKLocalPlayer's unregisterListener: or unregisterAllListeners to unregister from GKLocalPlayerListener event notifications.

GKGameSessionEventListenerPrivate.h

Removed +[GKGameSession postSession:didAddPlayer:]

Removed +[GKGameSession postSession:didRemovePlayer:]

Removed +[GKGameSession postSession:player:didChangeConnectionState:]

Removed +[GKGameSession postSession:player:didSaveData:]

Removed +[GKGameSession postSession:didReceiveData:fromPlayer:]

Removed +[GKGameSession postSession:didReceiveMessage:withData:fromPlayer:]

GKLocalPlayer.h

Modified +[GKLocalPlayer localPlayer]

	Declaration
From	+ (nonnull GKLocalPlayer *)localPlayer
To	@property (class, readonly, nonnull) GKLocalPlayer *localPlayer

GKPeerPickerController.h

Modified GKPeerPickerControllerDelegate

	Availability	Deprecation Message
From	Available	none
To	Deprecated	Use MCBrowserViewController along with MCBrowserViewControllerDelegate from the MultipeerConnectivity framework

Modified GKPeerPickerController.delegate

	Availability
From	Available
To	Deprecated

GKPublicProtocols.h

Modified GKSessionDelegate

	Availability	Deprecation Message
From	Available	none
To	Deprecated	Use MCSession in association with MCSessionDelegate from the MultipeerConnectivity framework instead

Modified GKVoiceChatClient

	Availability	Deprecation Message
From	Available	none
To	Deprecated	Use GKVoiceChat instead

GKSession.h

Modified GKSession.delegate

	Availability
From	Available
To	Deprecated

GKVoiceChatService.h

Modified GKVoiceChatService.client

	Availability
From	Available
To	Deprecated