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我尝试连接到服务器并向服务器发送一些信息(如用户名、密码..),然后服务器将 ID(字符串类型)发回给我。问题是我无法获得ID。有人可以帮我吗?我是IOS编码的初学者。谢谢。

这是代码:

  1. 单击按钮后,它将调用我自己的函数来获取字符串的 serverIP 和 int 的端口。
  2. 然后该函数将调用此函数来连接服务器:

    (void)logInCheck {
    
        asyncSocket = [[GCDAsyncSocket alloc] initWithDelegate:self delegateQueue:dispatch_get_main_queue()];   
        NSError *error = nil;
        uint16_t port = serverPort;
    
        if (![asyncSocket connectToHost:serverIP onPort:port error:&error])
        {
            DDLogError(@"Unable to connect to due to invalid configuration: %@", error);
        }
        else
        {
            DDLogVerbose(@"Connecting...");
            [self passDataToServer];
        }
    }
    
    //DataPassToServer is a NSString that hold my data
    
    (void)passDataToServer
    {
        NSData *requestData = [DataPassToServer dataUsingEncoding:NSUTF8StringEncoding];
        [asyncSocket writeData:requestData withTimeout:-1.0 tag:0];
        [asyncSocket readDataWithTimeout:-1 tag:0];
    }
    
    //this function call successfully
    
    -(void)socket:(GCDAsyncSocket *)sock didConnectToHost:(NSString *)host port:(UInt16)port
    {
        DDLogVerbose(@"socket:didConnectToHost:%@ port:%hu", host, port);
    }
    
    //this function call successfully
    
    (void)socket:(GCDAsyncSocket *)sock didWriteDataWithTag:(long)tag
    {
        DDLogVerbose(@"socket:didWriteDataWithTag:");
    }
    
    //This function does not run !!! Nothing print out. 
    
    (void)socket:(GCDAsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag
    {
        DDLogVerbose(@"socket:didReadData:withTag:");
        NSString *response = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
        NSLog(@"ID = %@",response);
        [asyncSocket readDataWithTimeout:-1 tag:0];
    }
    
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1 回答 1

4

我不知道您的服务器实现,但是,大多数实现会在处理请求之前读取第一个换行符。

因此,请确保您在末尾[DataPassToServer dataUsingEncoding:NSUTF8StringEncoding]包含换行符 ( )。"\n"

您的代码看起来不错,对我有用。

于 2012-09-07T09:26:34.153 回答