python/kivy .kv文件不会读取 [英] python / kivy .kv file wont read

问题描述

我刚刚开始学习编程，我有一个基于kivy.org网站上的乒乓球游戏教程的非常基本的应用程序，但是我必须有一个基本缺陷，我只能在运行程序时才能看到它得到的是黑屏，而不是预期的画布和标签.请帮助我减少基本时间！

I have just started learning to program I have a really basic App based on a pong game tutorial on the kivy.org site but I must have a basic flaw that I can't see as when I run the program all I am getting is a blank screen rather than the expected canvas and labels. Please help me to waste less time on basics!

from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.widget import Widget

class Singularity(Widget):
    pass

class SingularityApp(App):
    def build(self):
        return Singularity()

if __name__ in ('__main__', '__android__'):
    SingularityApp().run()

和奇点kv:

#:kivy 1.9.0

<Singularity>:    
    canvas:
        Rectangle:
            pos: self.center_x - 5, 0
            size: 10, self.height

    Label:
        font_size: 70  
        center_x: root.width / 4
        top: root.top - 50
        text: "0"

    Label:
        font_size: 70  
        center_x: root.width * 3 / 4
        top: root.top - 50
        text: "0"

推荐答案

• 检查您的MainApp(App)类名称是否与不带"App"的.kv文件名相同(如果不相同)(不区分大小写).例如:MaNagerApp(App)将加载manager.kv

OR

• 如果您不想更改名称，则只需添加self.load_kv(your_kv_file_name).

像这样:

def build(self):
    self.load_kv('singularity.kv')
    return Singularity()

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