Question

我试图简单地使用GCDAsyncSocket发送和接收消息，但无法使其正常工作。

我正在成功建立连接并写入消息，但是当涉及到阅读时，我的委托永远不会被调用。

我正在使用ios5和此设置：

客户端：

-(void) connectToHost:(HostAddress*)host{

    NSLog(@"Trying to connect to host %@", host.hostname);

    if (asyncSocket == nil)
    {
        asyncSocket = [[GCDAsyncSocket alloc] initWithDelegate:self delegateQueue:dispatch_get_main_queue()];

        NSError *err = nil;
        if ([asyncSocket connectToHost:host.hostname onPort:host.port error:&err])
        {
            NSLog(@"Connected to %@", host.hostname);

            NSString *welcomMessage = @"Hello from the client\r\n";
            [asyncSocket writeData:[welcomMessage dataUsingEncoding:NSUTF8StringEncoding] withTimeout:-1 tag:1];

            [asyncSocket readDataWithTimeout:-1 tag:0];
        }else
            NSLog(@"%@", err);
    }

}

不调用委托didReadData方法

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

    NSLog(@"MESSAGE: %@", [NSString stringWithUTF8String:[data bytes]]);

}

服务器

-(void)viewDidLoad{

    asyncSocket = [[GCDAsyncSocket alloc] initWithDelegate:self delegateQueue:dispatch_get_main_queue()];

    connectedSockets = [[NSMutableArray alloc] init];

    NSError *err = nil;
    if ([asyncSocket acceptOnPort:0 error:&err]){

        UInt16 port = [asyncSocket localPort];

        //...bojour stuff
    }
    else{
        NSLog(@"Error in acceptOnPort:error: -> %@", err);
    }

}

向客户端写入消息并等待成功套接字连接的响应

- (void)socket:(GCDAsyncSocket *)sock didAcceptNewSocket:(GCDAsyncSocket *)newSocket
{
    NSLog(@"Accepted new socket from %@:%hu", [newSocket connectedHost], [newSocket connectedPort]);

    // The newSocket automatically inherits its delegate & delegateQueue from its parent.

    [connectedSockets addObject:newSocket];

    NSString *welcomMessage = @"Hello from the server\r\n";
    [asyncSocket writeData:[welcomMessage dataUsingEncoding:NSUTF8StringEncoding] withTimeout:-1 tag:1];

    [asyncSocket readDataWithTimeout:-1 tag:0];

}

这不会被称为......

-(void)socket:(GCDAsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag{
    NSLog(@"New message from client... ");
}

Answer 1

好的，找到了答案。

问题是我在自己的套接字端而不是连接的套接字上写和读。

修正:(将asyncSocket更改为newSocket）

- (void)socket:(GCDAsyncSocket *)sock didAcceptNewSocket:(GCDAsyncSocket *)newSocket
{
    NSLog(@"Accepted new socket from %@:%hu", [newSocket connectedHost], [newSocket connectedPort]);

    // The newSocket automatically inherits its delegate & delegateQueue from its parent.

    [connectedSockets addObject:newSocket];

    NSString *welcomMessage = @"Hello from the server\r\n";
    [newSocket writeData:[welcomMessage dataUsingEncoding:NSUTF8StringEncoding] withTimeout:-1 tag:1];

    [newSocket readDataWithTimeout:-1 tag:0];

}

不调用GCDAsynSocketDelegate didReadData方法。使用GCDAsynSocket

1 个答案: