IOS游戏中心GKLocalPlayer监听器

Question

我试图在回合制游戏中实现一个事件监听器，这样玩家可以在轮到他或者被朋友邀请时接收。在IOS 7中不推荐使用GKTurnBasedEventHandler，我在文档中读到了我应该使用的GKLocalPlayerListener;但这是它的延伸。是否有人使用过它，因为任何地方都没有信息。

这是我以前尝试过的，它不起作用。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    GKLocalPlayer *localPlayer = [GKLocalPlayer localPlayer];
    [localPlayer authenticateWithCompletionHandler:^(NSError *error)
     {
         if (localPlayer.isAuthenticated)
         { 
             GKLocalPlayer *localPlayer = [GKLocalPlayer localPlayer];
             [localPlayer registerListener:self];
         }
     }];

    return YES;
}

-(void)handleInviteFromGameCenter:(NSArray *)playersToInvite
{
    NSLog(@"test");
}

- (void)player:(GKPlayer *)player receivedTurnEventForMatch:(GKTurnBasedMatch *)match didBecomeActive:(BOOL)didBecomeActive
{
    NSLog(@"test");
}

Answer 1

这是我用来注册GKLocalPlayerListener的一些代码

__weak GKLocalPlayer *localPlayer = [GKLocalPlayer localPlayer];
localPlayer.authenticateHandler = ^(UIViewController *viewController, NSError *error) {
   if (viewController) {
         [authenticateFromViewController presentViewController:viewController animated:YES completion:^{
          [localPlayer registerListener:self];
          NSLog(@"Authenticated. Registering Turn Based Events listener");
        }];
  } else if (localPlayer.authenticated) {
         [localPlayer registerListener:self];
         NSLog(@"User Already Authenticated. Registering Turn Based Events listener");
  } else {
         NSLog(@"Unable to Authenticate with Game Center: %@", [error localizedDescription]);
  }
};

文档说明您应该只注册一次GKLocalPlayerEventListener，这样您就可以通过检查是否已经注册来改进此代码。

请注意，在iOS 6中不推荐使用authenticateWithCompletionHandler，他们建议像我上面那样设置authenticateHandler属性。

Answer 2

我相信你在那里。就在这个时候做几件事。在添加侦听器之前，请确保不要添加多个侦听器，只需注销所有侦听器即可。

我确保我在整个项目中只做了一次，但我多次得到本地玩家。

-(void) onLocalPlayerAuthChanged:(GKLocalPlayer*)authPlayer {

    [authPlayer unregisterAllListeners];
    [authPlayer registerListener:_Whatever_];

}

Answer 3

我可能会有点迟到，但希望它可以帮助那些人......

这就是我的工作。根据Apple's documentation我创建[my]自己的方法，在适合[my] app时显示身份验证视图。

    - (void)authenticateLocalUser
    {
        if ([GKLocalPlayer localPlayer].authenticated == NO) {
            __weak typeof(self) weakSelf = self;
            __weak GKLocalPlayer *weakPlayer = [GKLocalPlayer localPlayer];

            weakPlayer.authenticateHandler = ^(UIViewController *viewController, NSError *error) {
                if (viewController != nil) {
                    [weakSelf showAuthenticationDialogWhenReasonable:viewController];
                } else if (weakPlayer.isAuthenticated) {
                    // Player has been authenticated!
                    [weakPlayer registerListener:weakSelf];
                } else {
                    // Should disable Game Center?
                }
            };

        } else {
            // Already authenticated
            [[GKLocalPlayer localPlayer] registerListener:self];
        }
    }


    -(void)showAuthenticationDialogWhenReasonable:(UIViewController *)controller
    {
        [[[[[UIApplication sharedApplication] delegate] window] rootViewController] presentViewController:controller animated:YES completion:nil];
    }

这段代码在单例辅助类中，如果你在自己的类中有它，它可能会被简化。