如何使用Kivy创建登录屏幕

pip install kivy

from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.textinput import TextInput

from kivy.uix.boxlayout import BoxLayout

class LoginScreen(BoxLayout):
    def __init__(self, **kwargs):
        super(LoginScreen, self).__init__(**kwargs)
        self.orientation = 'vertical'
        
        self.username_label = Label(text='Username')
        self.add_widget(self.username_label)
        
        self.username_input = TextInput(multiline=False)
        self.add_widget(self.username_input)
        
        self.password_label = Label(text='Password')
        self.add_widget(self.password_label)
        
        self.password_input = TextInput(password=True, multiline=False)
        self.add_widget(self.password_input)

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

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

python main.py