Qt QTcpServer

开发环境 Qt5.5.1、Qt Creator 3.5.1

1、初始化QTcpServer，监听本机指定的端口

void MyTcpServer::init() {

    tcpServer = new QTcpServer();

    if(tcpServer->listen(QHostAddress::Any, SERVER_PORT)) {

        qDebug()<<"tcpServer init";

        connect(tcpServer, SIGNAL(newConnection()), this, SLOT(processNewConnection()));

    } else {

        qDebug()<<tcpServer->errorString();

    }

}

2、处理客户端连接

void MyTcpServer::processNewConnection() {

    qDebug()<<"processNewConnection";

    QTcpSocket* tcpSocket = tcpServer->nextPendingConnection();

    connect(tcpSocket, SIGNAL(readyRead()), this, SLOT(processReadyRead()));

    connect(tcpSocket, SIGNAL(disconnected()), this, SLOT(processDisconnected()));

}

3、从客户端读取数据

void MyTcpServer::processReadyRead() {

    QByteArray rawreply= static_cast<QTcpSocket*>(sender())->readAll();

    qDebug()<<"read : "<<rawreply.data();

}

4、向客户端写数据

MyTcpServer::write(const char* str) {

   QTcpSocket* tcpSocket = static_cast<QTcpSocket*>(sender());

   tcpSocket->open(QTcpSocket::ReadWrite);

   tcpSocket->write(str);

   tcpSocket->flush();

}

5、最后关闭QTcpServer

void MyTcpServer::close() {

   tcpServer->close();

}

注意：以下3个方法必须被声明为槽SLOT

public slots:

    //处理客户端连接

    void processNewConnection();

    //处理读请求

    void processReadyRead();

    //客户端断开连接

    void processDisconnected();

文章来源: blog.csdn.net，作者：福州-司马懿，版权归原作者所有，如需转载，请联系作者。

原文链接：blog.csdn.net/chy555chy/article/details/51440643