Question

这是一个包含两个屏幕的简单代码：

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

Builder.load_string("""
<MenuScreen>:
    BoxLayout:
        Button:
            text: 'ONE'
            on_release: root.manager.current = 'main'
        Button:
            text: 'TWO'
            on_release: root.manager.current = 'main'
<MainScreen>:
    Button:
        on_release: root.manager.current = 'menu'
""")

class MenuScreen(Screen):
    pass
class MainScreen(Screen):
    pass
class ScreenManager(ScreenManager):
    pass

sm = ScreenManager()
sm.add_widget(MenuScreen(name='menu'))
sm.add_widget(MainScreen(name='main'))

class TestApp(App):
    def build(self):
        return sm
if __name__ == '__main__':
    TestApp().run()

我需要以下内容：

如果我点击＆＃34; ONE＆＃34;按钮（在MenuScreen中），应该在MainScreen上显示一个按钮，其中包含文本＆＃34; one＆＃34; （例如）
如果我点击＆＃34; TWO＆＃34;按钮（在MenuScreen中），应该在MainScreen上显示一个带有文本＆＃34; 2＆＃34;

我该怎么做？

P.S。抱歉我的英文不好

Answer 1

你的代码非常混乱;我已将其更改为更具可读性，并分为两个文件：

test.kv：

MyScreenManager:

    MenuScreen:
        id: menu
    MainScreen:
        id: main

<MenuScreen>:
    name: 'menu'

    BoxLayout:
        Button:
            text: 'ONE'
            on_release: root.switch_screen('one')

        Button:
            text: 'TWO'
            on_release: root.switch_screen('two')

<MainScreen>:
    name: 'main'

    Button:
        id: button
        on_release: root.manager.current = 'menu'

main.py：

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

objects = {}


class MyScreenManager(ScreenManager):
    pass


class MenuScreen(Screen):
    def switch_screen(self, text):
        objects['manager'].current = 'main'
        objects['main_button'].text = text


class MainScreen(Screen):
    pass


class TestApp(App):
    def build(self):
        objects['manager'] = self.root
        objects['main_button'] = self.root.ids.main.ids.button

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

简单的Kivy代码有两个屏幕

1 个答案: