linux qt 移植mqtt

sudo apt-get update
sudo apt-get install libpaho-mqtt-dev

QT += network
LIBS += -lpaho-mqtt

#include <QCoreApplication>
#include <QMqttClient>
#include <QDebug>

class MqttClient : public QObject
{
    Q_OBJECT
public:
    MqttClient(QObject *parent = nullptr) : QObject(parent)
    {
        client = new QMqttClient(this);
        connect(client, &QMqttClient::connected, this, &MqttClient::onConnected);
        connect(client, &QMqttClient::disconnected, this, &MqttClient::onDisconnected);
        connect(client, QOverload<QMqttMessage>::of(&QMqttClient::messageReceived), this, &MqttClient::onMessageReceived);

        client->setHostname("mqtt.eclipse.org"); // MQTT代理地址
        client->setPort(1883); // 默认端口
        client->connectToHost();
    }

private slots:
    void onConnected()
    {
        qDebug() << "Connected to MQTT broker";
        client->subscribe("test/topic", 0); // 订阅主题
    }

    void onDisconnected()
    {
        qDebug() << "Disconnected from MQTT broker";
    }

    void onMessageReceived(const QMqttMessage &msg)
    {
        qDebug() << "Message received:" << msg.payload();
    }

private:
    QMqttClient *client;
};

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    MqttClient mqttClient;

    return a.exec();
}

#include "main.moc"