python - 如何使用 PyQt 通知 Python 进程正在退出？

Question

我正在开发一个 Python 应用程序，并使用 uPnP 打开端口。问题在于，当应用程序被进程强制关闭时，端口仍然打开。所以我正在 PyQt (或其他东西)中搜索一个事件，以便在进程关闭时执行一些操作。确保我不是在谈论关闭按钮。

Answer 1

Q应用程序 aboutToQuit信号似乎正是为此目的而构建的。只需在代码中添加一个插槽并连接到该信号即可。您的槽位应在应用程序退出之前收到通知。

来自 pyQT 文档:

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.

The signal is particularly useful if your application has to do some last-second cleanup. Note that no user interaction is possible in this state.

(强调我的)