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我对游戏中心一无所知。我正在开发 COCO 应用程序，我已经阅读了游戏中心指南，并能够将游戏中心集成到我的应用程序中。

1） 现在我可以通过我的应用程序在游戏中心输入分数。 通过做这个：-

- (void) reportScore: (int64_t) score forCategory: (NSString*) category 
{
    GKScore *scoreReporter = [[[GKScore alloc] initWithCategory:category] autorelease]; 
    scoreReporter.value = score;
    [scoreReporter reportScoreWithCompletionHandler: ^(NSError *error) 
     {
         [self callDelegateOnMainThread: @selector(scoreReported:) withArg: NULL error: error];
     }];
}

我昨天工作正常。但是现在如果我尝试更新分数，它没有更新。请任何人知道分数没有在游戏中心更新的原因，我试图搜索但没有得到任何东西。

2）我想将一个玩家的当前纬度和经度发送给另一个玩家。我知道 GKMATCH 是可能的

GKMatchRequest *request = [[[GKMatchRequest alloc] init] autorelease];
    request.minPlayers = 1;
    request.maxPlayers = 1;

    [[GKMatchmaker sharedMatchmaker] findMatchForRequest:request
                                   withCompletionHandler:^(GKMatch *match, NSError *error) {
                                       if (error || !match) {
                                           // handle the error
                                       }
                                       else if (match != nil){
                                           // match found
                                       }}];

    /*GKMatchRequest *request = [[[GKMatchRequest alloc] init] autorelease];
    request.minPlayers = 1;
    request.maxPlayers = 1;
    GKMatchmakerViewController *mmvc = [[GKMatchmakerViewController alloc] initWithMatchRequest:request];
    mmvc.matchmakerDelegate = self;
    currentMatch.delegate=self;
    [self presentModalViewController:mmvc animated:YES];*/
    //[mmvc release];
}
- (void)match:(GKMatch *)match player:(NSString *)playerID didChangeState:(GKPlayerConnectionState)state {
    switch (state){
        case GKPlayerStateConnected: 
            if (match.expectedPlayerCount == 0) {
                // start the match
            }
            break;
        case GKPlayerStateDisconnected:
            // remove the player from the match, notify other players, etc
            break;
    } 
}
- (void)matchmakerViewControllerWasCancelled:(GKMatchmakerViewController *)viewController{}

// Matchmaking has failed with an error
- (void)matchmakerViewController:(GKMatchmakerViewController *)viewController didFailWithError:(NSError *)error{
}


// A peer-to-peer match has been found, the game should start
- (void)matchmakerViewController:(GKMatchmakerViewController *)viewController didFindMatch:(GKMatch *)match{
}

// Players have been found for a server-hosted game, the game should start
- (void)matchmakerViewController:(GKMatchmakerViewController *)viewController didFindPlayers:(NSArray *)playerIDs{
}

// An invited player has accepted a hosted invite.  Apps should connect through the hosting server and then update the player's connected state (using setConnected:forHostedPlayer:)
- (void)matchmakerViewController:(GKMatchmakerViewController *)viewController didReceiveAcceptFromHostedPlayer:(NSString *)playerID {
}
- (void) sendPosition
{
    NSError *error;
    NSString* str = @"teststring";
    NSData* data = [str dataUsingEncoding:NSUTF8StringEncoding];
    //  NSData *packet = [NSData dataWithBytes:&msg length:sizeof(PositionPacket)];
    [currentMatch sendDataToAllPlayers: data withDataMode: GKMatchSendDataUnreliable error:&error];
    if (error != nil)
    {
        // Handle the erro.r
    }
}

但我不知道为什么，但 GKMatchmakerViewController 的委托方法没有被调用，我已经设置了委托，但我仍然无法获得 GKMATCH（这里是 currentMatch）。所以由于这个 [currentMatch sendDataToAllPlayers: data withDataMode: GKMatchSendDataUnreliable error:&error]; 这种方法不起作用。

因为 CurrentMatch 参考是 0X0。请帮帮我。我如何发送和接收数据。我做错了什么？或者还有其他事情要做。

请帮我。

谢谢

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