在kivy中更改按钮或标签文本颜色

2022-01-15 00:00:00 python kivy

问题描述

我正在关注 这本 kivy 书，虽然我能理解如何更改按钮的背景颜色，我没有找到更改文本颜色的关键字.

I'm following this kivy book, and while I can understand how to change the background color of buttons, I haven't found the keyword to change the text color.

我看到了 这个和 其他问题.这是我的代码:

I saw this and other questions. Here's my code:

#!/usr/bin/kivy
import kivy
kivy.require('1.7.2')

from random import random
from kivy.app import App
from kivy.uix.widget import Widget
from kivy.uix.gridlayout import GridLayout
from kivy.graphics import Color, Ellipse, Rectangle

class MinimalApp(App):
    title = 'My App'
    def build(self):
        root = RootLayout()
        return(root)

class RootLayout(GridLayout):
    pass

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

在 .kv 文件中:

#:kivy 1.7.2
#:import kivy kivy

<RootLayout>:
    rows: 1
    Label:
        text: "Why does this not work?"
#        rgba: 1,0,1,1                  # doesn't work
#        Color:                         # doesn't work
#                rgba: 1,0,1,1          # doesn't work
#       font_color: rgba: 1,0,1,1
        canvas.before:
            Color:
                rgba: 0, 0, 0, 1
            Rectangle:
                pos: self.pos
                size: self.size

解决方案

使用color(全部小写):

Use color (all lowercase):

<RootLayout>:
    rows: 1
    Label:
        text: "Why does this not work?"
        color: 1,0,1,1 # <-----------
        canvas.before:
            Color:
                rgba: 0, 0, 0, 1
            Rectangle:
                pos: self.pos
                size: self.size

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