如何使绘制的线条每隔x秒消失在猕猴桃中？

Question

我正在用kivy编写一个Android游戏应用，并且想让绘制的线条在绘制后的x秒后消失。

我已经尝试过，请阅读kivy.doc或google，但找不到它或idk只是愚蠢。

py.

class Drawing(Widget):

    def on_touch_down(self, touch):
        with self.canvas:
            touch.ud["line"] = Line(points=(touch.x, touch.y))

    def on_touch_move(self, touch):
        touch.ud["line"].points += [touch.x, touch.y]

#They are what I've found and tried...

    def i_remove_widget(self):
        self.remove_widget(self.Drawing)
        Clock.schedule_once(self.i_remove_widget(), 1.5)

    def on_touch_up(self, touch):
        touch.ud["line"].self.remove = Clock.schedule_once(self, 1.5)

kv.
Screen:
    Drawing

我希望我的画线在1.5秒内消失，但是什么也没发生

Answer 1

类似这样的东西：

def on_touch_up(self, touch):
    line = touch.ud['line']
    def remove_line(*args):
        self.canvas.remove(line)
    Clock.schedule_once(remove_line, 1.5)