error : Class declarations lacks Q_OBJECT macro

直译是：类声明没有Q_OBJECT 宏。

class CError1 : public QObject

{



signals:

    void OnButClicked();        

};



class CError2 : public QObject

{

signals:

    void OnButClicked();        

};





class CError1 : public QObject

{

    Q_OBJECT

signals:

    void OnButClicked();        

};



类声明加上Q_OBJECT就好了。



class CError1 : public QObject

{

    Q_OBJECT

signals:

    void OnButClicked();        

};



class CError2 : public QObject

{

    Q_OBJECT

signals:

    void OnButClicked();        

};

class CError2 : public QObject

{

    Q_OBJECT

signals:

    void OnButClicked();        

};