退出 Qt 应用程序不会杀死生成的线程

Question

I have a Qt program that is using the QtConcurrent API to spawn worker threads. The problem I am having is that the worker threads keep going even if I exit the Qt application.

I have an actionExit in my menu, which is what i am using to close the app, or the "X" in the window corner. Is there any way to make these kill off all threads related to this app?

Thanks

Answer 1

Are you sure that the UI application really closes? You might be missing:

qApp->setQuitOnLastWindowClosed(true);

Otherwise QT only hides your window. To debug put a breakpoint behind your mainWindow->exec(); and see whether it is really reached.

If you confirm that exec() returns and QTConcurrent really hangs (it might be possible: http://lists.trolltech.com/qt-interest/2008-06/thread00414-0.html ), then do:

exit(0);