Tworzyłem grę, która pozwala na rozgrywki wieloosobowe. Wcześniej testowałem zaproszenia dla wielu graczy i wszystko działało. Wysłanie żądania z jednego urządzenia wyświetlało baner na drugim i jeśli zaproszenie zostało zaakceptowane, gra się rozpoczęła.

Tuż przed złożeniem aplikacji, dwie noce temu, przetestowałem tę funkcję ponownie, aby stwierdzić, że przestała działać.

- (void)authenticateLocalUser:(UIViewController *)viewController :(id<GCHelperDelegate>)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<GCHelperDelegate>)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];
        }
    };
}

Okno debugowania w xcode pokazuje:

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] <Notice>: 18:06:21.356712 com.apple.GameKitServices: -[GKDiscoveryManager startAdvertisingLocalPlayer:discoveryInfo:]: I am [<nil>] [7989F444CF2BDA83] discoveryInfo [{
        e = 2;
        h = A42FD7FD;
    }]

Czy w powyższych wierszach znaczące jest „Jestem []…”?

Pobrałem i uruchomiłem samouczek ze strony Raya Wenderlicha, aby stworzyć grę wieloosobową i spróbować. To pokazuje te same problemy, chyba że działa na pierwszym planie na obu urządzeniach. Moja aplikacja nie wyświetla żądań zaproszenia, nawet jeśli działa na pierwszym planie.

Czy ktoś inny doświadczył tego problemu lub ma jakieś pomysły, co się dzieje? authenticateLocalUser jest wywoływany z applicationDidFinishLaunching