Error trying to write data using GCDAsyncSocket on iOS 5.1 - ios

Question

I'm trying to use GCDAsyncSocket in my iOS app. I've been following all the step provided in the CocoaAsyncSocket's wiki. Here is what I'm doing:
GCDAsyncSocket socket = [[GCDAsyncSocket alloc] initWithDelegate:self delegateQueue:dispatch_get_main_queue()];
NSError *err = nil;
if (![socket connectToHost:#"192.168.0.129" onPort:2811 error:&err]) // Asynchronous!
{
// If there was an error, it's likely something like "already connected" or "no delegate set"
NSLog(#"I goofed: %#", err);
}
uint8_t buffer[2] = "1\n";
NSData *data = [NSData dataWithBytes: &buffer length: sizeof(buffer)];
[socket writeData:data withTimeout:10 tag:1];
I already included too frameworks dependences: Security & CFNetwork, and included in my class the respective delegate. Do I need any other configuration to use it?
When I run this example I get this error:
[NSMallocBlock bytes]: unrecognized selector sent to instance 0x6b7abe0
'NSInvalidArgumentException', reason: '-[NSMallocBlock bytes]: unrecognized selector sent to instance 0x6b7abe0'
And it occurs on this line of GCDAsyncSocket.m
const uint8_t *buffer = (const uint8_t *)[currentWrite->buffer bytes] + currentWrite->bytesDone;

Answer 1

try use this to convert your data, from string to data
+(NSData *) DataToHex: (NSString *) string
{
string = [string stringByReplacingOccurrencesOfString:#" " withString:#""];
int stringLength = string.length;
NSMutableData *hexStringArray = [[NSMutableData alloc] init];
[hexStringArray setLength:0];
unsigned char whole_byte;
char byte_chars[3] = {'\0','\0','\0'};
int i;
for (i=0; i < stringLength/2; i++)
{
byte_chars[0] = [string characterAtIndex:i*2];
byte_chars[1] = [string characterAtIndex:i*2+1];
whole_byte = strtol(byte_chars, NULL, 16);
[hexStringArray appendBytes:&whole_byte length:1];
} //this is auto way
return hexStringArray;
}