使用 GameKit 通过蓝牙发送数据崩溃
我正在尝试使用下面的方法通过 GameKit 蓝牙发送简单的数据。然而，当我的 2 台设备成功连接并点击按钮发送时，它只是在显示“EXC_BAD_ACCESS”的最后一行崩溃。知道出了什么问题吗？
- (IBAction)sendAction:(id)sender {
// convert an NSString to NSData
NSString *str = @"Yahooooo!!";
NSData *data = [str dataUsingEncoding: NSASCIIStringEncoding];
[currentSession sendDataToAllPeers:data withDataMode:GKSendDataReliable error:nil];
}
I'm trying to use the below method to send simple data through GameKit Bluetooth. However, when my 2 devices successfully connect and I tap the button to send, it just crashes at the last line showing "EXC_BAD_ACCESS". Any idea what's wrong?
- (IBAction)sendAction:(id)sender {
// convert an NSString to NSData
NSString *str = @"Yahooooo!!";
NSData *data = [str dataUsingEncoding: NSASCIIStringEncoding];
[currentSession sendDataToAllPeers:data withDataMode:GKSendDataReliable error:nil];
}
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您可能没有正确管理 currentSession 变量的保留计数。假设 currentSession 是一个成员变量，当您分配给 currentSession 时，如果它不是由名为 alloc 或 copy 的方法返回，您需要保留它直到您使用完它，此时您应该释放它。
您应该查看内存管理编程指南：
http: //developer.apple.com/library/ios/#documentation/Cocoa/Conceptual/MemoryMgmt/MemoryMgmt.html
You are probably not managing the retain count of the currentSession variable properly. Assuming that currentSession is a member variable, when you assign to currentSession, if it's not being returned by a method called alloc or copy, you need to retain it until you are done with it, at which point you should release it.
You should check out the Memory management Programming Guide:
http://developer.apple.com/library/ios/#documentation/Cocoa/Conceptual/MemoryMgmt/MemoryMgmt.html