python - 动画 Python Kivy

Question

程序启动时如何运行动画？当我运行它时：

self.window = BoxLayout(orientation="vertical")

self.logo = Image(source='starcoffeelogo.png', pos = (0, -440))

anim = Animation(pos = (0, 30), duration=1, t = 'out_back')

anim += Animation(opacity=1.0, duration=1)
anim += Animation(opacity=0.0, duration=2)
anim.bind(on_complete=self.after_anim_button)
self.window.add_widget(self.logo)
anim.start(self.logo)
return self.window

小部件 self.logo 添加到屏幕上并显示一秒钟，之后动画开始。怎么了？

标签： pythonkivy