ios - 游戏套件和 iPhone

Question

我将我的应用程序设置为在 p2p 连接期间以数组的形式向另一个人发送自定义级别。接收设备将数组保存到文件中以备后用。我在我的应用程序中设置了 gamekit，它将成功搜索并连接到另一台设备，没有任何问题。虽然当我向设备发送数据时出现问题，但接收设备将接收数据(并按应有的方式保存自定义级别)但它会立即崩溃。

这是我用来发送和接收数据的方法。

-(void) sendDataToPeers:(NSData *) data
{
    if (currentSession) 
    {
        //send the data
        [self.currentSession sendDataToAllPeers:data withDataMode:GKSendDataReliable error:nil];   

        //Alerting the user that the custom level has been sent.
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Sent!" message:@"Your custom level has been sent." delegate:self cancelButtonTitle:@"Close" otherButtonTitles:nil];
        [alert show];
        [alert release];
    }
}

-(void) btnSend
{
    //Data that will be sent
    NSMutableData *theData = [NSMutableData data];

    //Archiver
    NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:theData];

    //Desired level to send
    int theLevel =[[CTManager sharedInstance]getLevel];

    //Path to the custom levels
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory=[paths objectAtIndex:0];
    NSString *customLevelsSen = [documentsDirectory stringByAppendingPathComponent: [NSString stringWithFormat:@"customLevels"]];

    //Custom levels array
    NSArray *theLevels = [[NSArray alloc] initWithContentsOfFile: customLevelsSen];

    //Gets the desired level array from array of custom levels
    NSArray *myArray = [[NSArray alloc]initWithArray:[theLevels objectAtIndex:theLevel-51]];

    //prepare data
    [archiver encodeObject:myArray forKey:@"level"];
    [archiver finishEncoding];

    //send the data
    [self sendDataToPeers:theData];

    //cleanup
    [archiver release];
    [theLevels release];
    [myArray release];

}

-(void) receiveData:(NSData *)data fromPeer:(NSString *)peer inSession:(GKSession *)session context:(void *)context 
{   
    //Archiver
    NSKeyedUnarchiver *archiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:data];

    //Gets the custom level in form of an array from data.
    NSArray *level = [archiver decodeObjectForKey:@"level"];
    [archiver finishDecoding];
    [archiver release];

    //Path to the array of custom levels
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory=[paths objectAtIndex:0];
    NSString *customLevelsRec = [documentsDirectory stringByAppendingPathComponent: [NSString stringWithFormat:@"customLevels"]];

    //Gets the array of custom levels
    NSMutableArray *customLevelArray = [[NSMutableArray alloc] initWithContentsOfFile:customLevelsRec];

    //Adds a new array to the array of custom levels
    [customLevelArray addObject:level];

    //Saves the array.
    [customLevelArray writeToFile:customLevelsRec atomically:YES];

    //cleanup
    [customLevelArray release];

    //Message saying a custom level has been recieved
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Received!" message:@"A custom level has been saved." delegate:self cancelButtonTitle:@"Close" otherButtonTitles:nil];
    [alert show];
    [alert release];

}

测试这个很痛苦，因为我目前没有自己的两台设备，所以我将测试版发送给我的 friend ，他反过来测试它们(他有 ipod 和 iphone)。感谢您提供任何帮助...

如果我找不到问题，我很可能会将整个 xcode 项目发送给他，并通过屏幕共享与他计算机上的项目一起工作，以高效地构建和测试应用程序。而且我将能够使用 Debug模式。

Answer 1

我不知道你是否找到了这个问题的答案，我希望你找到了。但如果您没有，我强烈建议您尝试新 SDK 的新功能。他们没有经历整个编码/解码过程，而是通过让您执行以下操作(在您的发送方法中)使其变得简单:

data = [NSKeyedArchiver archivedDataWithRootObject:anObject];

其中 anObject 几乎可以是任何对象、数组、字典等等...

在您的接收方法中:

NSObject *object = [NSKeyedUnarchiver unarchiveObjectWithData:data];

其中对象也可以是几乎任何对象。

至于您遇到的崩溃，您是否已验证崩溃发生在哪条线路上？您确定它发生在您发布的代码中吗？或者它发生在其他地方？