IOS GCDAsyncSocket didReadData not called when implement in NSObject class - objective-c

Question

Im implementing GCDAsyncSocket delegate in NSObject class, then call it in viewController.
When running it, i found 'didConnectToHost' and 'didWriteDataWithTag' is called, but i didn't see 'didReadData' called. Here is my code:
SocketUtils.h
#interface SocketUtils : NSObject <GCDAsyncSocketDelegate>
#property (nonatomic) void (^SocketCallback)(id data);
#property (nonatomic) NSString *message;
#property (nonatomic) UIViewController *vc;
+ (SocketUtils *) createSocket:(NSString *)message inViewController:(UIViewController *)vc;
- (void) connectToSocket;
#end
SocketUtils.m
#implementation SocketUtils{
GCDAsyncSocket *socket;
}
+ (SocketUtils *) createSocket:(NSString *)message inViewController:(UIViewController *)vc{
SocketUtils *this = [[self alloc] init];
this.message = message;
[this connectToSocket];
return this;
}
- (void)connectToSocket{
socket = [[GCDAsyncSocket alloc] initWithDelegate:self delegateQueue:dispatch_get_main_queue()];
NSError *err = nil;
if (![socket connectToHost:SOCKET_IP onPort:[SOCKET_PORT intValue] error:&err])
{
NSLog(#"err: %#", [err localizedDescription]);
if(err){
[Utils showErrorDialog:[err localizedDescription] atViewController:_vc];
}
return;
}
}
#pragma mark - Socket delegate
- (void)socket:(GCDAsyncSocket *)sender didConnectToHost:(NSString *)host port:(UInt16)port
{
NSLog(#"Cool,didConnectToHost: %#", host);
[socket writeData:[_message dataUsingEncoding:NSUTF8StringEncoding] withTimeout:-1 tag:0];
}
- (void)socket:(GCDAsyncSocket *)sock didWriteDataWithTag:(long)tag
{
[socket readDataWithTimeout:-1 tag:0];
NSLog(#"didWriteDataWithTag: %ld", tag);
}
- (void)socket:(GCDAsyncSocket *)sender didReadData:(NSData *)data withTag:(long)tag
{
NSLog(#"didReadData : %#", data);
NSData *strData = [data subdataWithRange:NSMakeRange(0, [data length])];
NSString *msg = [[NSString alloc] initWithData:strData encoding:NSUTF8StringEncoding];
_SocketCallback(msg);
}
- (void)socketDidCloseReadStream:(GCDAsyncSocket *)sock{
NSLog(#"socketDidCloseReadStream");
}
-(void)socketDidDisconnect:(GCDAsyncSocket *)sock withError:(NSError *)err{
NSLog(#"disconnected to socket: %#", err);
[Utils showErrorDialog:[err localizedDescription] atViewController:_vc];
}
- (void)socket:(GCDAsyncSocket *)sock didAcceptNewSocket:(GCDAsyncSocket *)newSocket
{
NSLog(#"Accepted new socket from %#:%hu", [newSocket connectedHost], [newSocket connectedPort]);
}
Then in viewController i called:
socketUtils = [SocketUtils createSocket:#"GET_BOARD_CODE" inViewController:self];
socketUtils.SocketCallback = ^(id data) {
doSth();
};
The first thing that I predict is the destroying of this class, but i try to keep all #property = strong, but not work.
Can anyone help?

Answer 1

after many times to search, i realized that i forgot to append "\r\n" to message. Okey just change 1 line of code to:
this.message = [message stringByAppendingString:#"\r\n"];
And it work as expect.