使用 AsyncSocket 时客户端应用程序未按预期工作

Question

我在一个简单的客户端-服务器应用程序中使用 AsyncSocket 类。作为第一步，我希望 - 一旦客户端和服务器之间建立连接，客户端就会向服务器发送一条欢迎消息 - “已连接到 xyz 服务器”，并且服务器将其显示在文本视图中。

//The code in ClientController class is:

 -(void)awakeFromNib{
NSError *error = nil;
  if (![connectSocket connectToHost:@"192.168.0.32" onPort:25242 error:&error]) {
   NSLog(@"Error starting client: %@", error);
   return;
  }

  NSLog(@"xyz chat client started on port %hu",[connectSocket localPort]);
}
- (void)onSocket:(AsyncSocket *)sock didConnectToHost:(NSString *)host port:(UInt16)port{
               [sock writeData:[@"connected to xyz server" dataUsingEncoding:NSUTF8StringEncoding] withTimeout:30.0 tag:0];
}
- (void)onSocket:(AsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag{
               // some relevant code goes here
}
- (void)onSocket:(AsyncSocket *)sock didWriteDataWithTag:(long)tag{
               NSLog(@"within didWriteDataWithTag:"); // getting this message, means it should have written something to remote socket but
  // delegate- onSocket:didReadData:withTag: at server side is not getting invoked
}

// The code in ServerController class is:

 - (IBAction)startStop:(id)sender{
 NSLog(@"startStopAction");
 if(!isRunning)
 {
  NSError *error = nil;
  if(![listenSocket acceptOnPort:INPUT_PORT error:&error])
  {
   NSLog(@"Error starting server: %@", error);
   return;
  }

  NSLog(@"Echo server started on port %hu",[listenSocket localPort]);
  isRunning = YES;

  [sender setTitle:@"Stop"];
 }
 else
 {
  // Stop accepting connections
  [listenSocket disconnect];

  // Stop any client connections
  int i;
  for(i = 0; i < [connectedSockets count]; i++)
  {
   // Call disconnect on the socket,
   // which will invoke the onSocketDidDisconnect: method,
   // which will remove the socket from the list.
   [[connectedSockets objectAtIndex:i] disconnect];
  }

  NSLog(@"Stopped Echo server");
  isRunning = false;

  [sender setTitle:@"Start"];
 }
}
- (void)onSocket:(AsyncSocket *)sock didAcceptNewSocket:(AsyncSocket *)newSocket{
 [connectedSockets addObject:newSocket];
}
- (void)onSocket:(AsyncSocket *)sock didConnectToHost:(NSString *)host port:(UInt16)port{
 NSLog(@"Accepted client %@:%hu", host, port);  // it is getting displayed
 [sock readDataToData:[AsyncSocket CRLFData] withTimeout:READ_TIMEOUT tag:0];
}
- (void)onSocket:(AsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag{
        NSString *msgReceived = [[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding] autorelease];
 NSLog(@"msgReceived in didReadData- %@",msgReceived); // it is not getting displayed
        [outputView insertText:msgReceived];
        [sock readDataToData:[AsyncSocket CRLFData] withTimeout:READ_TIMEOUT tag:0];
}

谁能建议我哪里可能错了？ 提前致谢...... Miraaj

Answer 1

问题解决：刚刚使用：[sock readDataWithTimeout:READ_TIMEOUT tag:0];代替： [sock readDataToData:[AsyncSocket CRLFData] withTimeout:READ_TIMEOUT tag:0];