QT5出现问题：QtGui/QApplication: No such file or directory

For QT 5

Step1: .pro (in pro file, add these 2 lines)

QT       += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

Step2: In main.cpp replace code:

#include  

with:

#include 

来源： http://stackoverflow.com/questions/8995399/error-qapplication-no-such-file-or-directory

下面是.pro文件

1. QT += core gui
2. greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
4. TARGET = trafficSigns
5. TEMPLATE = app