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在使用 GameKit 时，我遇到了一个无法解释的问题。通过 WiFi ( picker.connectionTypesMask = GKPeerPickerConnectionTypeOnline;) 建立连接时，设备无法互相看到。当模拟器看到一切时，他们什么也看不到，它可以看到任何设备或模拟器在不同的机器上工作。几天来，我一直在努力研究它，我已经试图理解为什么它可以在模拟器上运行，但不能在设备上运行。谁能帮帮我吗？

这就是我创建会话的方式

 if (type == GKPeerPickerConnectionTypeOnline) 
{
    picker.delegate = nil;
    [picker dismiss];
    [picker autorelease];

    [alert setTitle:@"\n\n\n"];
    [alert setMessage:@"Looking for other iPads, iPhones or iPod touches..."];
    [alert addButtonWithTitle:@"Cancel"];

    UIActivityIndicatorView *progress   = [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(125, 50, 30, 30)];
    progress.activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhiteLarge;
    [alert addSubview:progress];
    [progress startAnimating];
    [alert show];

    self.gameSession = [[GKSession alloc] initWithSessionID:kSessionID displayName:nil sessionMode:GKSessionModePeer];
    self.gameSession.available = YES;
    self.gameSession.delegate = self;
    self.gameSession.disconnectTimeout = 0;
    [self.gameSession setDataReceiveHandler:self withContext:nil];
}
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