QApplication a(argc, argv); QLabel*label =newQLabel("Hello Qt!"); label->show();returna.exec(); } 分别执行: qmake -project qmake hello.pro make 在执行make时出现错误,提示:'QApplication'file not found 解决办法: 1、最简单的方法: 在hello.pro文件中增加1行: QT += widgets 2、或者在hel...
最近开始学习Qt(趟坑),买了一本《C++ GUI Qt 4编程》,照着书上的例子做,第一个就报编译不过,报错信息:'QApplication' file not found 查了下Qt助手, 使用qmake,需要加一句:QT += widgets 原因在于QApplication在Qt6中被放在了QtWidgets下,因此需包含widgets,当然最好的方式是根据Qt版本来判断,如下: greater...
'QApplication.h' file not found #include <QApplication.h> ^~~~ 1 error generated. make[5]: *** [src/tools/iCubGui/src/CMakeFiles/iCubGui.dir/animationview.cpp.o] Error 1 make[4]: *** [src/tools/iCubGui/src/CMakeFiles/iCubGui.dir/all] Error 2 make[3]: *** [all] Error ...
QApplication file not found 如下的代码,开头的前三行代码都报错,并且报错信息一样:QApplication file not found 代码语言:javascript 复制 #include<QApplication>#include<QDialog>#include<QLabel>intmain(int argc,char*argv[]){QApplicationa(argc,argv);QDialog w;QLabellabel(&w);label.setText("Hello ...
之后提示出错:fatal error: QApplication: No such file or directory由于Qt5将大部分桌面部件移到了Qt Widgets模块中,即QApplication已经从原来的<QtGui/QApplication>移动到<QtWidgets/QApplication>了。从下图也可以看出来。 所以为解决找不到QApplication文件 这个问题,有两种方法: ...
如下的代码，开头的前三行代码都报错，并且报错信息一样： QApplication file not found #include<Q...
1 Fatal error: qapplication.h: No such file or directory 1 Path is wrong, what to do? 0 QFile: directory not found 2 How to fix QFile open error (unknown error) even though the file exists? Hot Network Questions If Voyager is still an active NASA spacecraft, does it have a ...
This one help for me (In user bashrc file): export QT_LOGGING_DEBUG=1 Share Improve this answer Follow answered Feb 14, 2017 at 11:22 Šerg 80366 silver badges1818 bronze badges Add a comment Your Answer Sign up or log in Sign up using Google Sign up using Email and ...
adding a header file to the project will cause the build process to fail in dependency checking. There should be a workaround but I have not found it yet.Xcode will sometimes emit spurious internal errors about the build settings. I'm not sure if this is due a bug in qmake, a bug in...