fatal error: QtGui/QApplication: No such file or directory

Question

I\'m using Qt Creator, and this line is generated automatically by the Qt Creator:

#include

But, why am I getting this me

Answer 1

I had got same problem. From visual studio using Command Prompt(2010), I changed the path of prompt to where my Qt resides i.e. C:\Qt. There I set QTDIR environment variable.

c:\Qt> setx QTDIR C:\Qt

Then message was displayed:

SUCCESS: Specified value was saved.

Make sure VS is closed during this. When you reopen it, all headers will be detected.

I hope my solution will help anyone someday. Cheers :)

Answer 2

Depending on the Qt-version (5) QtGui was moved to QtWidgets; so it becomes

#include <QtWidgets/QApplication>

Answer 3

Issue solved.

I added this to PATH: C:\Qt\2010.05\qt\bin

Instead of: C:\Qt\2010.05\bin

As the latter didn't contain qmake.exe

Answer 4

This is a version problem.to fix,

• you need to add QT += widgets in the .pro file

• and run qmake

• and also use #include <QApplication> instead of #include <QtGui/QApplication>

Answer 5

You can try to add 'declarative' to the Project file:

QT += gui declarative

then

#include <QApplication>

It helps me