Qt快速项目 - 如何在qml文件中调用cpp函数？

#ifndef MYCLASS_HPP
#define MYCLASS_HPP

#include <QObject>

class MyClass : public QObject
{
    Q_OBJECT
public:
    Q_INVOKABLE void myFunction();
};

#endif // MYCLASS_HPP

#include "MyClass.hpp"
#include <QDebug>

void MyClass::myFunction()
{
    qDebug() << "C++ function called from QML";
}

#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QQmlContext>
#include "MyClass.hpp"

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

    QQmlApplicationEngine engine;

    // 注册MyClass类
    qmlRegisterType<MyClass>("com.example", 1, 0, "MyClass");

    engine.load(QUrl(QStringLiteral("qrc:/main.qml")));

    return app.exec();
}

import QtQuick 2.0
import com.example 1.0

Item {
    width: 200
    height: 200

    // 创建MyClass的实例
    MyClass {
        id: myClass
    }

    Button {
        text: "Call C++ Function"
        onClicked: {
            // 调用C++函数
            myClass.myFunction();
        }
    }
}