如何在QT中发送和接收UDP数据包

#include <QtNetwork>

int main()
{
    // 创建QUdpSocket对象
    QUdpSocket udpSocket;

    // 绑定端口（可选）
    udpSocket.bind(QHostAddress::Any, 1234);

    // 设置目标主机和端口
    QHostAddress targetAddress = QHostAddress::LocalHost;
    quint16 targetPort = 5678;

    // 发送数据包
    QByteArray datagram = "Hello, UDP!";
    udpSocket.writeDatagram(datagram, targetAddress, targetPort);

    return 0;
}

#include <QtNetwork>

int main()
{
    // 创建QUdpSocket对象
    QUdpSocket udpSocket;

    // 绑定端口
    udpSocket.bind(QHostAddress::Any, 5678);

    // 接收数据包
    while (udpSocket.hasPendingDatagrams()) {
        QByteArray datagram;
        datagram.resize(udpSocket.pendingDatagramSize());
        udpSocket.readDatagram(datagram.data(), datagram.size());
        qDebug() << "Received datagram:" << datagram;
    }

    return 0;
}