GravBox.py 文件源码

def build(self):
        sm = ScreenManager() #screenmanager module used for changing screens
        sc1 = WelcomeScreen(name='screen1')
        sc2 = InteractionScreen(name='screen2')
        sc3 = AboutScreen(name='screen3')
        sc4 = UiowaScreen(name='screen4')
        sm.add_widget(sc1) #builds the app screen by screen
        sm.add_widget(sc2)
        sm.add_widget(sc3)
        sm.add_widget(sc4)
        print (sm.screen_names)
        return sm