在猕猴桃中得到黑屏

Question

i am running this kivy app and it is just giving me a black window! What is the problem? I searched for a solution here and I didn't find something. this is the kivy file this is the python code

Answer 1

First of all, you need to post your code as text so people can actually copy paste it into their editors.

However, you are getting black screen because you have your code in __init__() method of the App class, move that code to build() method and you are good to go. For example:

class TestApp(App):

    def build(self):
        self.sm = ScreenManager()
        self.sm.add_widget(MainScreen(name='main'))
        # and so on
        return self.sm

Why?

You are calling TestApp().run() without creating an instance of the class so __init__() is never called. __init__() method is called only when you create an instance of the class.