Gamekit and iPhone help

Question

I have my app set up to send a custom level in a form of a array to another person during a p2p connection. The receiving device saves the array to file for later use. I set up gamekit in my application, it will successfully search and connect to another device without any problems. Though a problem arises when I send data to a device, the receiving device will receive the data (and save the custom level like it should) but it will immediately crash afterwords.

Here are my methods that I use to send and receive data.

-(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];

}

Testing this has been a pain since I don't have two devices of my own currently, so I send a beta build to my friend who inturns tests them (he has ipod and iphone). Any help with this is appreciated...

If I can't find the problem I will most likely send the entire xcode project to him and via screen share work with the project on his computer to efficiently build and test the application. And I will be able to use debug mode.

Answer 1

I don't see anything wrong in your receiveData method.

Have you checked that the folder where you are trying to save the data (customLevels) exists?

I have succeeded to connect via an application using GameKit a device and the iPhone simulator. It's really handy to debug.
I haven't check if it was by bluetooth or wifi.