QT 下TCP客户端

<pre name="code" class="cpp">//类里声明
QTcpSocket *tcpSocket;
//构造函数里
tcpSocket = new QTcpSocket(this);
socket_init();
connect(tcpSocket,SIGNAL(readyRead()),this,SLOT(readMessage()));
connect(tcpSocket,SIGNAL(error(QAbstractSocket::SocketError)),
this,SLOT(displayError(QAbstractSocket::SocketError)));
//初始化函数里
void Networkthread::socket_init(void){
blockSize = 0; //初始化其为0
tcpSocket->abort(); //取消已有的连接
tcpSocket->connectToHost("*.*.*.*",6800);
//连接到主机，这里从界面获取主机地址和端口号
}