当指定MDDialog时，kivymd MDDialog不显示项。

Question

我需要一个带有列表的kivymd MDDialig对话框。默认情况下将类型参数设置为MDDialog或“定制”时，它只显示对话框的标题，而不显示项本身。将类型参数设置为"simple“会导致错误。

from kivymd.app import MDApp
from kivy.lang import Builder
from kivymd.uix.dialog import MDDialog
from kivymd.uix.list import OneLineListItem

main = '''

AnchorLayout:
    padding: "25sp"
    anchor_x: "center"
    anchor_y: "top"
    TwoLineListItem:
        text: 'key'
        secondary_text: 'value_1'
        on_press: app.open_dialog()
'''

class Example(MDApp):

    def build(self):
        return Builder.load_string(main)
    
    def open_dialog(self):
        dialog = MDDialog(
            title="key",
            items=[
                OneLineListItem(text="value_1"),
                OneLineListItem(text="value_2")
            ]
        )
        dialog.open()

Example().run()

将类型设置为“简单”时会发生错误

File "kivy/properties.pyx", line 961, in kivy.properties.ObservableDict.__getattr__
KeyError: '\_left_container'

File "kivy/properties.pyx", line 964, in kivy.properties.ObservableDict.__getattr__
AttributeError: 'super' object has no attribute '__getattr__'

使用小部件的示例取自kivyMD文档。按钮显示正确，但元素不显示。任何暗示都会有帮助。

下面是显示问题的图片。

在这里输入图像描述

Answer 1

from kivy.lang import Builder
from kivy.properties import StringProperty

from kivymd.app import MDApp
from kivymd.uix.dialog import MDDialog
from kivymd.uix.list import OneLineAvatarListItem

KV = '''
<Item>

    ImageLeftWidget:
        source: root.source


MDFloatLayout:

    MDFlatButton:
        text: "ALERT DIALOG"
        pos_hint: {'center_x': .5, 'center_y': .5}
        on_release: app.show_simple_dialog()
'''


class Item(OneLineAvatarListItem):
    divider = None
    source = StringProperty()


class Example(MDApp):
    dialog = None

def build(self):
    self.theme_cls.theme_style = "Dark"
    self.theme_cls.primary_palette = "Orange"
    return Builder.load_string(KV)

def show_simple_dialog(self):
    if not self.dialog:
        self.dialog = MDDialog(
            title="Set backup account",
            type="simple",
            items=[
                Item(text="user01@gmail.com", source="kivymd/images/logo/kivymd-icon-128.png"),
                Item(text="user02@gmail.com", source="data/logo/kivy-icon-128.png"),
            ],
        )
    self.dialog.open()


Example().run()

https://kivymd.readthedocs.io/en/1.1.1/components/dialog/#kivymd.uix.dialog.dialog.MDDialog.items