编写一份udt通信qt代码示例

很高兴为您解答！

以下是一个简单的UDT通信示例，使用Qt框架：

#include <QUdpSocket>
#include <QString>

class UDTCommunicator : public QObject
{
    Q_OBJECT

public:
    UDTCommunicator(QObject *parent = nullptr);
    ~UDTCommunicator();

    void connectToHost(const QString &hostAddress, quint16 port);
    void disconnectFromHost();

signals:
    void messageReceived(const QString &message);

public slots:
    void sendMessage(const QString &message);

private slots:
    void processPendingDatagrams();

private:
    QUdpSocket *m_socket;
    QHostAddress m_hostAddress;
    quint16 m_port;
};

UDTCommunicator::UDTCommunicator(QObject *parent)
    : QObject(parent)
    , m_socket(new QUdpSocket(this))
{
    connect(m_socket, &QUdpSocket::readyRead, this, &UDTCommunicator::processPendingDatagrams);
}

UDTCommunicator::~UDTCommunicator()
{
    disconnectFromHost();
    delete m_socket;
}

void UDTCommunicator::connectToHost(const QString &hostAddress, quint16 port)
{
    m_hostAddress = QHostAddress(hostAddress);
    m_port = port;
}

void UDTCommunicator::disconnectFromHost()
{
    m_socket->close();
}

void UDTCommunicator::sendMessage(const QString &message)
{
    QByteArray datagram = message.toUtf8();
    m_socket->writeDatagram(datagram, m_hostAddress, m_port);
}

void UDTCommunicator::processPendingDatagrams()
{
    while (m_socket->hasPendingDatagrams()) {
        QByteArray datagram;
        datagram.resize(m_socket->pendingDatagramSize());

        QHostAddress sender;
        quint16 senderPort;

        m_socket->readDatagram(datagram.data(), datagram.size(), &sender, &senderPort);
        QString message = QString::fromUtf8(datagram);
        emit messageReceived(message);
    }
}

上述示例使用QUdpSocket实现UDP通信。您可以使用sendMessage()方法发送消息，使用messageReceived()信号接收消息。如果要连接到远程主机，可以使用connectToHost()方法；用disconnectFromHost()方法断开连接。注意，这个示例仅仅是一个演示，您需要根据自己的需求进行修改和扩展。

希望这个示例可以帮助到您！