c++ - 如何捕捉 QSystemTrayIcon 退出事件？

Question

我有一个 QSystemTrayIcon 子类。在里面，我有:

quitAction = new QAction(tr("&Quit"), m_parent);
connect(quitAction, SIGNAL(triggered()), qApp, SLOT(quit())); 

CloseEvent 在这里不起作用。我怎样才能捕捉到这个退出事件？我想在关闭前保存数据。

Answer 1

您应该将清理/保存代码连接到 QCoreApplication::aboutToQuit()信号。

This signal is emitted when the application is about to quit the main event loop, e.g. when the event loop level drops to zero. This may happen either after a call to quit() from inside the application or when the users shuts down the entire desktop session.