20 | Qt4 to Qt5 transition FAQ

1 Prerequisite

1.1 Reference address

https://wiki.qt.io/Transition_from_Qt_4.x_to_Qt5#846d0d314d8d4894bde364f45acf02e4

2 FAQ

Question 1: error: QWidget: No such file or directory

Solution:
Open the pro file and include:

QT += widgets

问题2：error: QSound: No such file or directory

Solution:
Open the pro file and include:

QT += multimedia 

问题3：QtGui/QApplication: No such file or directory

Solution: