我正在尝试访问 main.py 中的 id:container,但似乎找不到正确的输入。这是我的 main.py
class ScreenFive(Screen):
def on_start(self):
for i in range(20):
self.ids.screen_manager2.classes.container.add_widget(
OneLineListItem(text=f"Single-line item {i}")
)
这是我的 main.kv 文件
<ScreenFive>
name: 'home'
FitImage:
source: 'Media/home_bg.png'
BoxLayout:
orientation: 'vertical'
MDToolbar:
title: 'QR Attendance'
left_action_items: [["menu", lambda x: nav_drawer.toggle_nav_drawer()]]
elevation:5
Widget:
NavigationLayout:
ScreenManager:
id: screen_manager2
Screen:
name: 'classes'
MDCard:
orientation: "vertical"
padding: "8dp"
size_hint: None, None
size: "280dp", "400dp"
pos_hint: {"center_x": .5, "center_y": .5}
ripple_behavior: True
focus_behavior: True
md_bg_color: self.theme_cls.bg_light
ScrollView:
MDList:
id: container
我应该怎么做才能在我的屏幕“类”中访问 MDList?谢谢你。