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POGame Center Invitations Not Displayed
 

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    <p>I have been developing a game which allows for multiplayer matches. I had previous tested the multiplayer invitations and they had all worked. Sending a request from one device displayed a banner on the other and if the invite was accepted the game started.</p> <p>Just before submitting the app, two nights ago, I tested this functionality again only to find that it has stopped working.</p> <pre><code>- (void)authenticateLocalUser:(UIViewController *)viewController :(id&lt;GCHelperDelegate&gt;)theDelegate { delegate = theDelegate; self.presentingViewController = viewController; if (!gameCenterAvailable) { // Game Center is not available. userAuthenticated = FALSE; } else{ GKLocalPlayer *localPlayer = [GKLocalPlayer localPlayer]; /* The authenticateWithCompletionHandler method is like all completion handler methods and runs a block of code after completing its task. The difference with this method is that it does not release the completion handler after calling it. Whenever your application returns to the foreground after running in the background, Game Kit re-authenticates the user and calls the retained completion handler. This means the authenticateWithCompletionHandler: method only needs to be called once each time your application is launched. This is the reason the sample authenticates in the application delegate's application:didFinishLaunchingWithOptions: method instead of in the view controller's viewDidLoad method. Remember this call returns immediately, before the user is authenticated. This is because it uses Grand Central Dispatch to call the block asynchronously once authentication completes. */ //ios 6 [localPlayer setAuthenticateHandler:(^(UIViewController* viewcontroller, NSError *error) { if (viewcontroller != nil){ userAuthenticated = FALSE; [self.presentingViewController presentViewController: viewcontroller animated: YES completion:nil]; } else if (localPlayer.isAuthenticated){ // Enable Game Center Functionality userAuthenticated = TRUE; [self checkForInvite:self.presentingViewController :delegate]; if (! self.currentPlayerID || ! [self.currentPlayerID isEqualToString:localPlayer.playerID]) { // Current playerID has changed. Create/Load a game state around the new user. self.currentPlayerID = localPlayer.playerID; // get friends of local player [localPlayer loadFriendsWithCompletionHandler:^(NSArray *friends, NSError *error) { if (friends != nil) { [self loadPlayerData: friends]; } }]; } } else{ userAuthenticated = FALSE; } [scoreHandler setGameCentreAvailable:userAuthenticated]; })]; } } - (void)checkForInvite :(UIViewController *)viewController :(id&lt;GCHelperDelegate&gt;)theDelegate { delegate = theDelegate; self.presentingViewController = viewController; NSLog(@"Invite handler installed"); [GKMatchmaker sharedMatchmaker].inviteHandler = ^(GKInvite *acceptedInvite, NSArray *playersToInvite) { // Insert application-specific code here to clean up any games in progress. if (acceptedInvite){ NSLog(@"Accepted"); GKMatchmakerViewController *mmvc = [[[GKMatchmakerViewController alloc] initWithInvite:acceptedInvite] autorelease]; mmvc.matchmakerDelegate = self; [viewController presentViewController: mmvc animated: YES completion:nil]; } else if (playersToInvite) { NSLog(@"Match Request"); GKMatchRequest *request = [[[GKMatchRequest alloc] init] autorelease]; request.minPlayers = 2; request.maxPlayers = 2; request.playersToInvite = playersToInvite; GKMatchmakerViewController *mmvc = [[[GKMatchmakerViewController alloc] initWithMatchRequest:request] autorelease]; mmvc.matchmakerDelegate = self; [viewController presentViewController: mmvc animated: YES completion:nil]; } }; } </code></pre> <p>The debug window in xcode shows the following:</p> <pre><code>2013-03-27 18:06:20.112 MyApp[791:907] Authentication changed: player authenticated. 2013-03-27 18:06:21.219 MyApp[791:907] Invite handler installed Mar 27 18:06:21 Neils-iPhone MyApp[791] &lt;Notice&gt;: 18:06:21.356712 com.apple.GameKitServices: -[GKDiscoveryManager startAdvertisingLocalPlayer:discoveryInfo:]: I am [&lt;nil&gt;] [7989F444CF2BDA83] discoveryInfo [{ e = 2; h = A42FD7FD; }] </code></pre> <p>Is the "I am []..." significant in the lines above?</p> <p>I have even downloaded and run the tutorial from Ray Wenderlich's site for creating a multiplayer game and tried that. That exhibits the same issues, unless it is running in the foreground on both devices. My app does not display invitation requests even if running in the foreground.</p> <p>Has anyone else experienced this problem or have any ideas what is going on? authenticateLocalUser is called from applicationDidFinishLaunching</p>
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