Kivy进度条改变颜色，无需kv

Question

嗨，我想在没有 kv 文件的情况下更改 kivy 进度条的颜色，我该怎么做？

Answer 1

这是我在网上找到的片段：

from kivy.app import App
from kivy.uix.progressbar import ProgressBar
from kivy.uix.boxlayout import BoxLayout
from kivy.clock import Clock
from kivy.graphics import Color, Rectangle

class CustomProgressBar(ProgressBar):
    def __init__(self, **kwargs):
        super(CustomProgressBar, self).__init__(**kwargs)

        # Set initial color
        self.color = [1, 0, 0, 1]  # Red color

    def set_color(self, color):
        self.color = color

class MyApp(App):
    def build(self):
        layout = BoxLayout(orientation='vertical')

        self.progress_bar = CustomProgressBar(max=100)
        layout.add_widget(self.progress_bar)

        # Change color after 2 seconds
        Clock.schedule_once(self.change_color, 2)

        return layout

    def change_color(self, dt):
        # Change the color of the progress bar
        self.progress_bar.set_color([0, 1, 0, 1])  # Green color

if __name__ == '__main__':
    MyApp().run()

使用函数

Clock.schedule_once()

和

set_color()

将颜色更改为您喜欢的颜色，并且不要忘记更改 RGBA 值或间隔