Qt简单UDP代码

最新推荐文章于 2025-05-19 23:36:27 发布

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最新推荐文章于 2025-05-19 23:36:27 发布 · 791 阅读

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CC 4.0 BY-SA版权

文章标签：

#Qt #Qt基础 #Qt网络编程 #UDP编程 #C++

这篇博客介绍了如何在Qt环境中实现简单的UDP通信。通过C++编写代码，详细讲解了创建UDP套接字、发送和接收数据的基本步骤，是Qt网络编程初学者的实用教程。

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receiver = new QUdpSocket(this);
    receiver->bind(QHostAddress::LocalHost, 16665);
    connect(receiver, SIGNAL(readyRead()),this, SLOT(readPendingDatagrams()));

void Widget::readPendingDatagrams()
 {
     while (receiver->hasPendingDatagrams()) {
         QByteArray datagram;
         datagram.resize(receiver->pendingDatagramSize());
         receiver->readDatagram(datagram.data(), datagram.size());
         ui->textEdit->append( QString(datagram));
     }
 }

void Widget::on_pushButton_clicked()
{

    QUdpSocket *sender;
    sender = new QUdpSocket(this);

    QByteArray datagram = ui->lineEdit->text().toUtf8();

    //UDP广播
    sender->writeDatagram(datagram.data(),datagram.size(),QHostAddress::Broadcast,16665);

    //向特定IP发送
    QHostAddress serverAddress = QHostAddress("127.0.0.1");
    sender->writ