Socket

QT Socket

TcpServer

QT += network 

• 创建一个 TcpServer

    QTcpServer *server = new QTcpServer;

• 监听

    server->listen(QHostAddress::Any, 9988);

• connect 新连接

    connect(server,
            &QTcpServer::newConnection,
            this,
            &TcpServer::sl_serconnect
            );

• slot 处理新来的连接 然后用一个 socket 接管新来的连接 之后 connect 处理读写

    void TcpServer::sl_serconnect()
    {
        //  有多个连接一次不取出来只调用一次nextPendingConnection
        while (_server->hasPendingConnections())
        {
            socket = server->nextPendingConnection();
  
            connect(socket,
                    &QTcpSocket::readyRead,
                    this,
                    &TcpServer::sl_readyread
                    );
        }
  
    }
  
    void TcpServer::sl_readyread()
    {
        QByteArray buf = _socket->readAll();
        _textbrowser->append(buf);
    }

TcpSocket

• 创建一个 Tcpclient

    QTcpSocket *client = new QTcpSocket(this);

• 连接server

    client->connectToHost("127.0.0.1", 9988);

• 写数据

    client->write(strText.toUtf8());