GameCenter邀请处理程序

Question

尝试实现一个多人游戏。使用来自Game Center - Sending and receiving data的示例。

一切似乎都很好，但在apple documentation中也有关于邀请处理程序的说法。

[GKMatchmaker sharedMatchmaker].inviteHandler = ^(GKInvite *acceptedInvite, NSArray *playersToInvite) {
   // Insert application-specific code here to clean up any games in progress.
   if (acceptedInvite) {
        GKMatchmakerViewController *mmvc = [[[GKMatchmakerViewController alloc] initWithInvite:acceptedInvite] autorelease];
        mmvc.matchmakerDelegate = self;
        [self presentModalViewController:mmvc animated:YES];
    } else if (playersToInvite) {
        GKMatchRequest *request = [[[GKMatchRequest alloc] init] autorelease];
        request.minPlayers = 2;
        request.maxPlayers = 4;
        request.playersToInvite = playersToInvite;

        GKMatchmakerViewController *mmvc = [[[GKMatchmakerViewController alloc] initWithMatchRequest:request] autorelease];
        mmvc.matchmakerDelegate = self;
        [self presentModalViewController:mmvc animated:YES];
    }
};

问题很简单:我不知道在哪里添加这段代码。

Answer 1

如文档中所述

应用程序应该在应用程序启动后尽早设置邀请处理程序；设置处理程序的合适位置是在您提供的完成块中，该块在本地播放器通过身份验证后执行。

在您的代码中的某个地方，您应该已经使用如下内容对本地播放器进行了身份验证

[[GKLocalPlayer localPlayer] authenticateWithCompletionHandler:^(NSError *error) {
    if (error == nil) {
        // Insert your piece of code here
    } else {
        // Handle the error
    }
}];

希望这能有所帮助

Answer 2

我的代码如下，它工作得很好。在authenticateLocalUser中，添加以下代码：

[[GKLocalPlayer localPlayer] authenticateWithCompletionHandler:^(NSError *error) {
    [GKMatchmaker sharedMatchmaker].inviteHandler = ^(GKInvite *acceptedInvite, NSArray *playersToInvite) {  // Add for invite handler
        // Insert application-specific code here to clean up any games in progress.
        if (acceptedInvite) {
            GKMatchmakerViewController *mmvc = [[GKMatchmakerViewController alloc] initWithInvite:acceptedInvite] ;
            mmvc.matchmakerDelegate = self;
            // [self presentModalViewController:mmvc animated:YES];
            [_delegate matchStart];
        } else if (playersToInvite) {
            GKMatchRequest *request = [[GKMatchRequest alloc] init] ;
            request.minPlayers = 2;
            request.maxPlayers = 2;
            request.playersToInvite = playersToInvite;

            GKMatchmakerViewController *mmvc = [[GKMatchmakerViewController alloc] initWithMatchRequest:request] ;
            mmvc.matchmakerDelegate = self;
            // [self presentModalViewController:mmvc animated:YES];
            [_delegate matchStart];
        }
    };

    [self callDelegateOnMainThread:@selector(processGameCenterAuth:) withArg:NULL error:error];
}];