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Mr. Robot's questions

Martin Hope
Mr. Robot
Asked: 2020-10-20 02:42:21 +0000 UTC
  • 1

是的，我刚开始研究这个话题，所以不要严格判断：D

所以为了测试我铆了最简单的东西

主要.py：

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.button import Button

class Interface():
    pass

class MyApp(App):
    def build(self):
        return Interface()

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

我的应用程序.kv

#:kivy 1.10.1
<Interface>:
    BoxLayout:
        orientation:vertical
        Button:
            text:Hello

解释器返回什么

INFO   ] [Logger      ] Record log in /home/alex/.kivy/logs/kivy_18-10-19_35.txt
[INFO   ] [Kivy        ] v1.10.1
[INFO   ] [Python      ] v2.7.15rc1 (default, Apr 15 2018, 21:51:34)
[GCC 7.3.0]
[INFO   ] [Factory     ] 194 symbols loaded
[INFO   ] [Image       ] Providers: img_tex, img_dds, img_sdl2, img_pil, img_gif (img_ffpyplayer ignored)
[INFO   ] [Text        ] Provider: pil(['text_sdl2'] ignored)
[CRITICAL] App.root must be an _instance_ of Widget
 Traceback (most recent call last):
   File "main.py", line 13, in <module>
     MyApp().run()
   File "/usr/lib/python2.7/dist-packages/kivy/app.py", line 806, in run
     raise Exception('Invalid instance in App.root')
 Exception: Invalid instance in App.root

怎么做，怎么做？）

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