GCDAsyncSocket readData未调用

Question

我试图向服务器发送一条消息，并使用我的iPhone接收响应。我可以使用以下方法连接到服务器：

telnet 123.123.123.1 6000
Trying 123.123.123.1...
Connected to 123.123.123.1.
Escape character is '^]'.
?VERSION
OK
VERSION=PROTOCOL: 1.1.0 

？版本是我的问题。

OK声明它收到并理解了这个问题

VERSION=是来自服务器的响应。

所以我试着做同样的事，但是用xcode

所以我把这个放在我的viewDidLoad里

dispatch_queue_t mainQueue = dispatch_get_main_queue();
asyncSocket = [[GCDAsyncSocket alloc]initWithDelegate:self delegateQueue:mainQueue];
asyncSocket.delegate = self;

NSString *host = @"123.123.123.1";
uint16_t port = 6000;

NSLog(@"Connecting to \"%@\" on port %hu...", host, port);

NSError *error = nil;
if (![asyncSocket connectToHost:host onPort:port withTimeout:5.0 error:&error])
{
    NSLog(@"Error connecting: %@", error);
}
else
{
    NSLog(@"Connecting...");
}

我有下面的代码显示它是连接的

-(void)socket:(GCDAsyncSocket *)sock didConnectToHost:(NSString *)host port:
(UInt16)port

{
NSLog(@"socket:%p didConnectToHost:%@ port:%hu", sock, host, port);

// We're just going to send a test string to the server.

NSString *myStr = @"?VERSION";
NSData *myData2 = [myStr dataUsingEncoding:NSUTF8StringEncoding];

[asyncSocket writeData:myData2 withTimeout:-1 tag:0];


}

下面是它写的

-(void)socket:(GCDAsyncSocket *)sock didWriteDataWithTag:(long)tag{
NSLog(@"WRITING");
[asyncSocket readDataToData:[GCDAsyncSocket LFData] withTimeout:-1 tag:0];
}

遗憾的是，这件事从未被召唤过。

- (void)socket:(GCDAsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag
{


NSString *tempString = [[NSString alloc]initWithData:data 
                                        encoding: NSUTF8StringEncoding];


}

我迷路了，真的需要一些帮助

Answer 1

这是因为你说，写和读同时。首先调用[asyncSocket writeData:myData2 withTimeout:-1 tag:0];，在didWriteDataWithTag中调用[asyncSocket readDataToData:[GCDAsyncSocket LFData] withTimeout:-1 tag:0];。你在一个线程上-- dispatch_get_main_queue() --它不能同时做两件事。