未调用 Kivy MDDropDownMenu 回调函数

Question

所以下拉菜单会显示所有选项，但单击它们时不会调用回调函数。可能是什么问题？提前致谢！这里是 main.py:

def __init__(self, **kwargs):
    self.screen = Builder.load_file('main.kv')
    channels = ['channel1', 'channel2', 'channel3', 'channel4']
    self.channels_menu = MDDropdownMenu(
        caller=self.screen.ids.add_client_screen.ids.channels_drop_item,
        items=[{"text": i} for i in channels],
        position="center",
        width_mult=4,
    )
    self.channels_menu.bind(on_release=self.menu_callback)

def menu_callback(self, instance_menu, instance_menu_item):
    print(instance_menu, instance_menu_item)

def build(self):
    return self.screen

这里是 .kv:

<AddClientScreen>:

    text: "AddClient"

    MDBoxLayout:
       orientation: "vertical"

        MDBoxLayout:
            spacing: 50
            orientation: "vertical"
            size_hint: 1, 0.65
        
        MDDropDownItem:
            id: channels_drop_item
            text: "Channel"
            on_release: app.channels_menu.open()

Answer 1

从 master 分支更新 KivyMD 库。新 API 仅在主版本 (dev) 中可用 - https://github.com/kivymd/KivyMD/blob/master/kivymd/__init__.py#L35

未调用 Kivy MDDropDownMenu 回调函数

Kivy MDDropDownMenu callback function is not being invoked

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