Qt:如何将来自不同类的静态信号连接到插槽？

// 发送信号的类
class Sender : public QObject
{
    Q_OBJECT
public:
    explicit Sender(QObject *parent = nullptr) : QObject(parent) {}

signals:
    void mySignal(int value);
};

// 接收信号的类
class Receiver : public QObject
{
    Q_OBJECT
public:
    explicit Receiver(QObject *parent = nullptr) : QObject(parent) {}

public slots:
    void mySlot(int value)
    {
        qDebug() << "Received value:" << value;
    }
};

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    Sender sender;
    Receiver receiver;

    // 连接信号和槽
    QObject::connect(&sender, &Sender::mySignal, &receiver, &Receiver::mySlot);

    // 发送信号
    emit sender.mySignal(42);

    return app.exec();
}