反射, 在我看來 就是 運(yùn)行時(shí)把字符串映射為類.

我不是很專業(yè), 還望各位大佬嘴下留情.....

參考 https://blog.csdn.net/kenier/article/details/62041312https://blog.csdn.net/liulong1567/article/details/45273017

?第一種方式:

// class TestReflection : public QObject {Q_OBJECT public://此處必須使用 Q_INVOKABLE Q_INVOKABLE explicit TestReflection(QObject *parent = nullptr):QObject(parent){m_name.clear();}Q_INVOKABLE QString name() const {return m_name;} private:QString m_name; };//調(diào)用qRegisterMetaType<TestReflection*>();int type = QMetaType::type("TestReflection*");const QMetaObject *metaObj = QMetaType::metaObjectForType(type);QObject *obj = metaObj->newInstance(Q_ARG(QString, QStringLiteral("Reflection")),Q_ARG(QObject*, nullptr));TestReflection *test = qobject_cast<TestReflection*>(obj);QString retVal;QMetaObject::invokeMethod(test, "name", Qt::DirectConnection,Q_RETURN_ARG(QString, retVal));qDebug() << "result: " << retVal;

?第二種方式:

// #include <QObject> #include <QtDebug> #include <QByteArray> #include <QMetaObject> #include <QHash> class A : public QObject {Q_OBJECT public:A(QObject *p) : QObject(p){qDebug() << Q_FUNC_INFO;}Q_INVOKABLE void name(){qDebug() << Q_FUNC_INFO;} };// class ObjectFactory { public:template<typename T> static void registerClass(){qDebug() << "class name: [" << typeid(T).name() << "]";constructors().insert( T::staticMetaObject.className(), &constructorHelper<T> );}static QObject* createObject( const QByteArray& className, QObject* parent = nullptr ){Constructor constructor = constructors().value( className );if ( constructor == nullptr )return nullptr;return (*constructor)( parent );}private:typedef QObject* (*Constructor)( QObject* parent );template<typename T> static QObject* constructorHelper( QObject* parent ){return new T( parent );}static QHash<QByteArray, Constructor>& constructors(){static QHash<QByteArray, Constructor> instance;return instance;} };//調(diào)用ObjectFactory::registerClass<A>();A* object = (A*)ObjectFactory::createObject( "A" );if(object){QMetaObject::invokeMethod(object, "name", Qt::DirectConnection);}

?

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