此处的官方示例显示了如何将小部件旋转一次:
from kivy.app import App
from kivy.lang import Builder
kv = '''
FloatLayout:
Button:
text: 'hello world'
size_hint: None, None
pos_hint: {'center_x': .5, 'center_y': .5}
canvas.before:
PushMatrix
Rotate:
angle: 45
origin: self.center
canvas.after:
PopMatrix
'''
class RotationApp(App):
def build(self):
return Builder.load_string(kv)
RotationApp().run()
但是如果我想创建一个旋转循环,即如何多次更改角度(并显示结果)?
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