MyThread是我自己新建的類,出現這種錯誤可以從四個方面排除。
- Make sure the Q_OBJECT macro is present in the definition of all QObject-derived classes.
- Make sure you declare your QObject-derived classes in your header files ONLY.
- Make sure all of your header files are listed in your .pro file in the HEADERS= list.
- Run qmake every time you add Q_OBJECT to one of your classes or modify your .pro file.