如何使用 .kv 文件在 kivy 中创建下拉列表

Question

我在 .kv 中创建下拉列表时遇到问题，所以任何人都可以帮助我并给我仅包含 1-10 个数字的下拉列表的代码

Answer 1

You can use official documentation as a reference

.kv

<CustomDropDown>:
    Button:
        text: 'My first Item'
        size_hint_y: None
        height: 44
        on_release: root.select('item1')
    Label:
        text: 'Unselectable item'
        size_hint_y: None
        height: 44
    Button:
        text: 'My second Item'
        size_hint_y: None
        height: 44
        on_release: root.select('item2')

.py

class CustomDropDown(DropDown):
    pass

dropdown = CustomDropDown()
mainbutton = Button(text='Hello', size_hint=(None, None))
mainbutton.bind(on_release=dropdown.open)
dropdown.bind(on_select=lambda instance, x: setattr(mainbutton, 'text', x))