C++ 致命错误：QtGui/QApplication：没有那个文件或目录
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fatal error: QtGui/QApplication: No such file or directory
提问by Simplicity
I'm using Qt Creator, and this line is generated automatically by the Qt Creator:
我正在使用 Qt Creator，这一行是由 Qt Creator 自动生成的：
#include <QtGui/QApplication>
#include <QtGui/QApplication>
But, why am I getting this message?
但是，为什么我会收到此消息？
QtGui/QApplication: No such file or directory
QtGui/QApplication: No such file or directory
回答by Miguel Rodriguez
Depending on the Qt-version (5) QtGui was moved to QtWidgets; so it becomes
根据 Qt 版本 (5) QtGui 移至 QtWidgets；所以它变成
#include <QtWidgets/QApplication>
回答by VeroLom
You can try to add 'declarative' to the Project file:
您可以尝试在项目文件中添加“声明性”：
QT += gui declarative
then
然后
#include <QApplication>
It helps me
它帮助到我
回答by Simplicity
Issue solved.
问题解决了。
I added this to PATH: C:\Qt\2010.05\qt\bin
我将此添加到PATH：C:\Qt\2010.05\qt\bin
Instead of: C:\Qt\2010.05\bin
代替： C:\Qt\2010.05\bin
As the latter didn't contain qmake.exe
由于后者不包含 qmake.exe
回答by Sachith
This is a version problem.to fix,
这是一个版本问题。要修复，
- you need to add
QT += widgetsin the.profile and run
qmakeand also use
#include <QApplication>instead of#include <QtGui/QApplication>
- 你需要
QT += widgets在.pro文件中添加 并运行
qmake并且还使用
#include <QApplication>代替#include <QtGui/QApplication>
回答by NightFury
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 QTDIRenvironment variable.
我遇到了同样的问题。从使用命令提示符（2010）的 Visual Studio，我将提示符的路径更改为我的 Qt 所在的位置，即C:\Qt. 在那里我设置了QTDIR环境变量。
c:\Qt> setx QTDIR C:\Qt
c:\Qt> setx QTDIR C:\Qt
Then message was displayed:
然后显示消息：
SUCCESS: Specified value was saved.
SUCCESS: Specified value was saved.
Make sure VS is closed during this. When you reopen it, all headers will be detected.
确保在此期间关闭 VS。当您重新打开它时，将检测到所有标题。
I hope my solution will help anyone someday. Cheers :)
我希望我的解决方案有一天能帮助任何人。干杯:)
