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python-3.x - 添加大量小部件时，kivymd 应用程序冻结

问题描述

当我尝试向 MDList 添加许多小部件时，应用程序冻结。我可以在添加每个小部件后更新 gui 吗？是否可以在不冻结的情况下添加小部件？

from kivy.lang import Builder
from kivy.properties import ObjectProperty
from kivymd.app import MDApp
from kivymd.uix import Screen
from kivymd.uix.button import MDRaisedButton
from kivymd.uix.list import OneLineIconListItem
kv = '''
ScreenManager:
    id: screen_mng
    Screen:
        name: 'scr 1'
        Button_:
            screen_mng: screen_mng
            text: 'scr 2'
            on_release:
                screen_mng.current = 'scr 2'
    Screen_:
        list: container_
        name: 'scr 2'
        on_pre_enter: self.load_items()
        ScrollView:
            MDList:
                id: container_'''

class Button_(MDRaisedButton):
    screenmanager = ObjectProperty()

class Screen_(Screen):
    list = ObjectProperty()

    def load_items(self):
        for i in range(100):
            item = OneLineIconListItem(text=str(i))
            self.list.add_widget(item)

class Test(MDApp):
    def build(self):
        return Builder.load_string(kv)

app = Test()
app.run()

如果我使用多线程，没有任何变化，应用程序仍然冻结

def load_items(self):
    Thread(target=self._load_items).start()

def _load_items(self):
    for i in range(100):
        item = OneLineIconListItem(text=str(i))
        self.list.add_widget(item)

请帮忙

标签： python-3.xkivyfreezekivymd

解决方案

感谢所有对我的问题发表评论的人，我做了我需要做的一切。

from kivy.lang import Builder
from kivy.properties import ObjectProperty, StringProperty
from kivymd.app import MDApp
from kivymd.uix import Screen
from kivymd.uix.button import MDRaisedButton
from kivymd.uix.list import OneLineIconListItem
from kivy.uix.recycleview import RecycleView

kv = '''
<ListItem>:
    IconLeftWidget:
        icon: root.icon

<RV>:

    viewclass: 'ListItem'
    RecycleBoxLayout:
        default_size: None, dp(56)
        default_size_hint: 1, None
        size_hint_y: None
        height: self.minimum_height
        orientation: 'vertical'
<Screen_>:
    BoxLayout:
        Button_:
            text: 'update'
            on_release: rv.update()
        RV:
            id: rv


ScreenManager:
    id: screen_mng
    Screen:
        name: 'scr 1'
        Button_:
            screen_mng: screen_mng
            text: 'scr 2'
            on_release:
                screen_mng.current = 'scr 2'
    Screen_:
        name: 'scr 2'

'''


class Button_(MDRaisedButton):
    screenmanager = ObjectProperty()

class RV(RecycleView):
    def __init__(self, **kwargs):
        super(RV, self).__init__(**kwargs)
        self.update()

    def update(self):
        self.data = [{'type': i, 'arg': i**2, 'text': str(i + 1)} for i in range(100)]



class ListItem(OneLineIconListItem):
    icon = StringProperty()

    def __init__(self, type=None, arg=None, **kwargs):
        super().__init__(**kwargs)
        self.arg = arg
        self.type = type
        self.icon = self.__return_icon()

    def __return_icon(self):
        self.type = 'android'
        return 'android'


class Screen_(Screen):
    list = ObjectProperty()

    def load_items(self):
        self.list.update()

class Test(MDApp):
    def build(self):
        return Builder.load_string(kv)


app = Test()
app.run()

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