使用 Kivy 屏幕管理器,我创建了两个屏幕。在屏幕 1 中,我想更改屏幕 2 中的标签。我在我的代码中突出显示了有问题的区域:
我的test.ky:
#: import ScreenManager kivy.uix.screenmanager.ScreenManager
#: import Screen kivy.uix.screenmanager.ScreenManager
#: import SettingsScreen screen
ScreenManager:
MenuScreen:
SettingsScreen:
<MenuScreen>:
name: 'MenuScreen'
BoxLayout:
Button:
text: 'Goto nn'
on_press:
root.manager.current = 'SettingsScreen'
root.change_text()
<SettingsScreen>:
name: 'SettingsScreen'
label_id: label_field
BoxLayout:
Label:
id: label_field
text: "to_be_changed"
和我的screen.py
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.screenmanager import ScreenManager, Screen
class MenuScreen(Screen):
def change_text(self):
pass
# HERE: something like
# root.SettingsScreen.label_field.text = 'new text'
class SettingsScreen(Screen):
pass
class TestApp(App):
pass
TestApp().run()
非常感谢任何帮助! 谢谢,妮可
最佳答案
这个怎么样:
当您按下 MenuScreen 上的按钮时,它会在自身上设置一个属性,其中包含您要放入 SettingsScreen 标签中的文本。然后在kv文件中给MenuScreen赋一个id值,用来引用这个属性。示例:
主.py
class MenuScreen(Screen):
text = StringProperty('')
def change_text(self):
self.text = "The text you want to set"
self.manager.current = "SettingsScreen"
class SettingsScreen(Screen):
label_text = StringProperty('')
kv文件
ScreenManager:
id: screen_manager
MenuScreen:
id: menu_screen
name: 'MenuScreen'
manager: screen_manager
SettingsScreen:
name: 'SettingsScreen'
manager: screen_manager
label_text: menu_screen.text
<MenuScreen>:
BoxLayout:
Button:
text: 'Goto nn'
on_press:
root.change_text()
<SettingsScreen>:
BoxLayout:
Label:
text: root.label_text
如您所见,我在 kv 文件中的 ScreenManager 下设置了屏幕的名称和 ID,因为这是我通常会做的事情。
关于python - Kivy - 屏幕管理器 - 访问其他类中的属性,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/27362687/