Kivy-获得黑屏

Question

为什么我会出现黑屏？ 守则在10分钟前运作良好。 准则有什么问题，我看不到任何错误！ 我也找不到在线的任何解决方案！ 你们知道如何解决问题吗？

#!/usr/bin/env python

import kivy

kivy.require("1.10.0")

import os
import humanize
from glob import glob
from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.gridlayout import GridLayout

class Layout(GridLayout):
    def __init__(self,**kwargs):
        super(Layout,self).__init__(**kwargs)
        self.cols = 1

     def scan(self):
        pass          
        scanb = Button(text="Scan",background_color=(1,0,1,1),font_size=(50))
        title = Label(text="StorageCleaner",font_size=(50),size_hint=(.1,.2),background_color=(1,0,0,1))

        self.add_widget(title)
        self.add_widget(copy)
        scanb.bind(on_press=scan)

class StorageCleaner(App):
    def build(self):
        layout = Layout()
        return layout

sc = StorageCleaner()

if __name__ == "__main__":
       sc.run()

Answer 1

可能是扫描功能“通过”后的缩进。 看起来'scanb'，'title'等缩进了一个级别

Answer 2

您有一些错误。 有关详细信息，请参见以下示例。

例

main.py

import kivy
kivy.require("1.10.0")

import os
import humanize
from glob import glob
from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.button import Button
from kivy.uix.gridlayout import GridLayout


class Layout(GridLayout):

    def __init__(self, **kwargs):
        super(Layout, self).__init__(**kwargs)

        self.cols = 1

        scanb = Button(text="Scan", font_size=50)
        scanb.bind(on_press=self.scan)
        title = Label(text="StorageCleaner", font_size=50, size_hint=(.1, .2))

        self.add_widget(title)
        self.add_widget(scanb)

    def scan(self):
        pass


class StorageCleaner(App):

    def build(self):
        return Layout()


if __name__ == "__main__":
    StorageCleaner().run()

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