屏幕管理器

在以下示例中，有 2 个屏幕：SettingsScreen 和 MenuScreen

使用第一个按钮，在当前屏幕上将你的屏幕更改为另一个屏幕。

这是代码：

from kivy.app import App
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen

# Create both screens. Please note the root.manager.current: this is how
# you can control the ScreenManager from kv. Each screen has by default a
# property manager that gives you the instance of the ScreenManager used.
Builder.load_string("""
<MenuScreen>:
    BoxLayout:
        Button:
            text: 'First Button on Menu'
            on_press: root.manager.current = 'settings'
        Button:
            text: 'Second Button on Menu'

<SettingsScreen>:
    BoxLayout:
        Button:
            text: 'First Button on Settings'
            on_press: root.manager.current = 'menu'
        Button:
            text: 'Second Button on Settings'

""")

# Declare both screens
class MenuScreen(Screen):
    pass

class SettingsScreen(Screen):
    pass

# Create the screen manager
sm = ScreenManager()
sm.add_widget(MenuScreen(name='menu'))
sm.add_widget(SettingsScreen(name='settings'))

class TestApp(App):

    def build(self):
        return sm

if __name__ == '__main__':
    TestApp().run()