How do I send an array of integers via GKSession bluetooth - ios

Question

I have a problem with sending an array of integers via GKSession.
This is how I did it:
To send it.
-(void)sendData {
NSMutableArray *myArray = [[NSMutableArray alloc] init];
[myArray addObject:[NSNumber numberWithInteger:snakeHead.position.x]];
[myArray addObject:[NSNumber numberWithInteger:snakeHead.position.y]];
[myArray addObject:[NSNumber numberWithInteger:direction.x]];
[myArray addObject:[NSNumber numberWithInteger:direction.y]];
[myArray addObject:[NSNumber numberWithInteger:bodyOffsetX]];
[myArray addObject:[NSNumber numberWithInteger:bodyOffsetY]];
[myArray addObject:[NSNumber numberWithInteger:amountBodies]];
NSData* encodedArray = [NSKeyedArchiver archivedDataWithRootObject:myArray];
[snakeSession sendData:encodedArray toPeers:snakePeers withDataMode:GKSendDataReliable
error:nil];
[encodedArray release];
}
The sendData function is called from a scheduler.
To receive it.
-(void)receiveData:(NSData *)data fromPeer:(NSString *)peer inSession:(GKSession *)session
context:(void *)context {
NSArray *hisArray = [NSKeyedUnarchiver unarchiveObjectWithData:data];
snakeHead2.position = ccp([[hisArray objectAtIndex:0] integerValue],
[[hisArray objectAtIndex:1] integerValue]);
direction2 = ccp([[hisArray objectAtIndex:2] integerValue],
[[hisArray objectAtIndex:3] integerValue]);
bodyOffsetX2 = [[hisArray objectAtIndex:4] integerValue];
bodyOffsetY2 = [[hisArray objectAtIndex:5] integerValue];
amountBodies2 = [[hisArray objectAtIndex:6] integerValue];
}
This does not work and the game crashes.
So what am I doing wrong here?

Answer 1

heres what I would do. it even sends less bytes! (faster)
// to send
int snakeHead_position_x = 0;
int snakeHead_position_y = 0;
int direction_x = 0;
int direction_y = 0;
int bodyOffsetX = 0;
int bodyOffsetY = 0;
int amountBodies = 0;
NSString *package = [NSString stringWithFormat:#"%i|%i|%i|%i|%i|%i|%i",
snakeHead_position_x, snakeHead_position_y, direction_x,
direction_y, bodyOffsetX, bodyOffsetY, amountBodies];
NSData *data = [package dataUsingEncoding:NSASCIIStringEncoding];
assert(data); // this is critical don't remove!
//printf("sending %u bytes...\n", data.length);
[snakeSession sendData:data toPeers:snakePeers withDataMode:GKSendDataReliable error:nil];
// to retrieve
NSArray *intArray = [[[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding] componentsSeparatedByString:#"|"];
int snakeHead_position_x = [intArray[0] intValue];
int snakeHead_position_y = [intArray[1] intValue];
int direction_x = [intArray[2] intValue];
int direction_y = [intArray[3] intValue];
int bodyOffsetX = [intArray[4] intValue];
int bodyOffsetY = [intArray[5] intValue];
int amountBodies = [intArray[6] intValue];