将on_request_close绑定到调用Window.close()的函数（以及其他退出脚本）。

from kivy.app import App
from kivy.core.window import Window
from kivy.uix.gridlayout import GridLayout

class GameApp(App):
       
    def build(self):
        return MenuScreen()

class MenuScreen(GridLayout):

    def __init__(self, **kwargs):
        super(MenuScreen, self).__init__(**kwargs)   
        Window.bind(on_request_close=self.end_func)

    def end_func(self, *args):
        app.stop()
        Window.close()

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if __name__ == "__main__":
    App.stop
    Window.close()

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这对我来说很有用