如何将回调函数从qml传递到C++？

// CallbackReceiver.h
#include <QObject>

class CallbackReceiver : public QObject
{
    Q_OBJECT
public slots:
    void callbackFunction();
};

// CallbackReceiver.cpp
#include "CallbackReceiver.h"

void CallbackReceiver::callbackFunction()
{
    // 在这里实现回调函数的逻辑
}

import QtQuick 2.0

Item {
    property var callbackReceiver: CallbackReceiver {}
}

function qmlCallbackFunction() {
    // 在这里实现回调函数的逻辑
    // 可以调用C++中的函数或者发送信号给C++
    callbackReceiver.callbackFunction();
}

// 在C++中获取QML上下文并连接回调函数
QQmlContext* context = engine.rootContext();
QObject* callbackReceiver = context->contextProperty("callbackReceiver").value<QObject*>();
QObject::connect(qmlObject, SIGNAL(callbackSignal()), callbackReceiver, SLOT(callbackFunction()));