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();        
};