c/c++语言开发共享Q_OBJECT

 #define Q_OBJECT  public:      Q_OBJECT_CHECK      QT_WARNING_PUSH      Q_OBJECT_NO_OVERRIDE_WARNING      static const QMetaObject staticMetaObject;      virtual const QMetaObject *metaObject() const;      virtual void *qt_metacast(const char *);      virtual int qt_metacall(QMetaObject::Call, int, void **);      QT_TR_FUNCTIONS  private:      Q_OBJECT_NO_ATTRIBUTES_WARNING      Q_DECL_HIDDEN_STATIC_METACALL static void qt_static_metacall(QObject *, QMetaObject::Call, int, void **);      QT_WARNING_POP      struct QPrivateSignal {};      QT_ANNOTATE_CLASS(qt_qobject, "")

1. 公有QMetaObject静态对象staticMetaObject
2. 私有qt_static_metacall静态函数
3. virtual const QMetaObject *metaObject() const;    用于获取类静态拥有的元对象
4. virtual void *qt_metacast(const char *);                   通过元对象获取对象指针
5. virtual int qt_metacall(QMetaObject::Call, int, void **);     用于信号槽机制

1：为该类型的所有对象共有，属于类变量。

2:  私有静态函数qt_static_metacall,类里使用

3.4.5 在MOC生成代码的时候会重写这些虚函数。

 class QMetaObject { struct { // private data         const QMetaObject *superdata;         const QByteArrayData *stringdata;         const uint *data;         typedef void (*StaticMetacallFunction)(QObject *, QMetaObject::Call, int, void **);         StaticMetacallFunction static_metacall;         const QMetaObject * const *relatedMetaObjects;         void *extradata; //reserved for future use     } d; };

 struct QArrayData {     QtPrivate::RefCount ref;     int size;     uint alloc : 31;     uint capacityReserved : 1;      qptrdiff offset; // in bytes from beginning of header }

<图片来源网络>

c/c++开发分享Q_OBJECT地址：https://blog.csdn.net/jadeshu/article/details/107060428