Kivy文字刷新

Question

我有主文件 main.py 和其他几个针对不同屏幕的设计文件。在主屏幕上，文本应根据货币价值而变化。但它没有改变，我不明白为什么

主.py

from kivymd.app import MDApp
from kivy.lang import Builder
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.core.window import Window
from kivy.utils import get_color_from_hex
from kivy.core.text import LabelBase
from kivy.clock import Clock

Window.size = (430, 930)

class ShopScreen(Screen):
    Builder.load_file("Shop.kv")

class ItemsScreen(Screen):
    Builder.load_file("Items.kv")

class HomeScreen(Screen):
    Builder.load_file("Home.kv")
    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        self.money = 224
        self.ids.coins.text = str(self.money)
        Clock.schedule_interval(self.update_text, self.money)

    def update_text(self, dt):
        self.money += 1
        self.ids.coins.text = str(self.money)

class WindowManager(FloatLayout):
    pass

class MainApp(MDApp):
    def build(self):
        self.theme_cls.theme_style = "Dark"
        sm = ScreenManager()
        sm.add_widget(ShopScreen(name='menu'))
        sm.add_widget(ItemsScreen(name='items'))
        sm.add_widget(HomeScreen(name='main'))
        return WindowManager()


if __name__ == "__main__":
    LabelBase.register(name="Press Start 2P",
                    fn_regular='./font/PressStart2P-Regular.ttf')
    MainApp().run()

主.kv

#: import get_color_from_hex kivy.utils.get_color_from_hex
<WindowManager>:
    MDBottomNavigation: 
        font_name: "./font/PressStart2P-Regular.ttf"
        panel_color: get_color_from_hex("#1B1B1B")
        text_color_active: 1, 1, 0, 1
        MDBottomNavigationItem:
            icon: 'home'
            name: 'shop'
            text: 'МАГАЗИН'
            ShopScreen:
 
        MDBottomNavigationItem:
            icon: 'home'
            name: 'main'
            text: 'ГОЛОВНА' 
            HomeScreen:
  
        MDBottomNavigationItem:
            icon: 'home'
            name: 'items'
            text: 'ХЕЛПЕРИ'
            ItemsScreen:

home.kv

<HomeScreen@Screen>:
    BoxLayout:
        orientation: 'vertical'
        padding: 10
        BoxLayout:
            size_hint: 1, 0.1
            padding: 40
            MDLabel:
                font_name: "Press Start 2P"
                text: 'name'
            MDLabel:
                id: coins
                font_name: "Press Start 2P"
                text: '0'
                halign: 'right'
        BoxLayout:
            orientation: 'vertical'
            spacing: 20
            Image:
                size_hint: 1, 0.9
                source: "boss.png"
            Button:
                font_name: "Press Start 2P"
                text: 'Грати'
                background_color: 0,0,0,0
                size_hint: .9, 0.1
                pos_hint: {'center_x': 0.5, 'center_y': 0.5}
                canvas.before:
                    Color:
                        rgba: (27/255,27/255,27/255,1)
                    RoundedRectangle:
                        pos: self.pos
                        size: self.size
                        radius: [30]

        BoxLayout:
            orientation: 'vertical'
            size_hint: 1, 0.4
            padding: 40
            spacing: 40 
            Label: 
                pos_hint: {'center_x': 0.15, 'center_y': 0.1}
                size_hint: 1, 0.1
                text: 'артефакти'
                font_name: "Press Start 2P"
            BoxLayout:
                spacing: 40 
                size_hint: 1, 1

                MainItem1:

                MainItem2:

                MainItem3:

如何在文本中显示变量 Money 的数据并更新它（如果可能）

Answer 1

在您的

HomeScreen

类中，您以

update_text

的延迟来调度

self.money

方法，该延迟最初设置为 224。这意味着

update_text

方法将每 224 秒调用一次，而不是每秒调用一次。

要每秒更新文本，您应该将其安排为 1 秒的间隔（或您喜欢的任何间隔），而不是使用

self.money

。

更新了 HomeScreen 类：

class HomeScreen(Screen):
    Builder.load_file("Home.kv")
    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        self.money = 224
        self.ids.coins.text = str(self.money)
        Clock.schedule_interval(self.update_text, 1)  # Update every second

    def update_text(self, dt):
        self.money += 1
        self.ids.coins.text = str(self.money)

这将每秒用

self.money

的更新值更新文本。

确保从

self.money

中删除

Clock.schedule_interval

参数。