asyncSocket writeData crashes with different NSData

If I use this to set up NSData then the writeData method crashes.

   NSString *test = @"The quick brown fox jumped over the lazy dog\r\n";
   NSData *data = [test dataUsingEncoding:NSUTF8StringEncoding];

   [asyncSocket writeData:data withTimeout:10 tag:4];

However if I use this one then it works... but I need the NSString so I can enter a formatted string to send...

 char bytes[] = "The quick brown fox jumped over the lazy dog\r\n";
 NSData* data = [[NSData alloc] initWithBytes:bytes length:sizeof(bytes)];

 [asyncSo开发者_C百科cket writeData:data withTimeout:10 tag:4];

So what did I do wrong?

The NSString and the NSDate were not setup with alloc and init so they were gone when they got to the write data. I changed the NSDate to alloc and init and all works well now. These idea came from the several people that answered this. thanks for the help!

The latter is null terminated, the former is not. This is probably the issue.

I know its bit late but I thought it would be good to know why this works - When you call writeData method with your data buffer, the asyncsocket code creates a new object by sublassing NSObject - AsyncWritePacket using the data passed down. It then uses retain and takes ownership of the data buffer you are passing hence why you dont want to release it.

@implementation AsyncWritePacket
- (id)initWithData:(NSData *)d timeout:(NSTimeInterval)t tag:(long)i
{
    if((self = [super init]))
    {
        buffer = [d retain];
        timeout = t;
        tag = i;
        bytesDone = 0;
    }
    return self;

@end