如何将 Kivy 设置为在间隔后自动为形状的位置设置动画？

Question

如何让 Kivy 在间隔后为 Rectangle 的位置设置动画？目前，它只是为 POSITION 1 设置动画。

但是，我希望它在动画到位置 2 之前等待 3 秒，再等待 3 秒，然后动画到位置 3

我怎样才能做到这一点？我还是个编码新手。

（未使用 .kv 文件）

from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.gridlayout import GridLayout
from kivy.uix.anchorlayout import AnchorLayout
from kivy.graphics import Rectangle
from kivy.graphics import Color
from kivy.animation import Animation
from kivy.core.window import Window
from kivy.clock import Clock


class MyGrid(AnchorLayout):

    def __init__(self, **kwargs):
        super(MyGrid, self).__init__(**kwargs)
        self.inside = GridLayout()
        self.inside.cols = 12

        for letter in "CANVAS":
            self.inside.add_widget(Label(text=str(letter), color=[1, 1, 1, 1], font_size='80sp', ))

        self.add_widget(self.inside)

        with self.canvas:
            # POSITIONS
            self.positionLeft_1 = 50
            self.positionLeft_2 = 150
            self.positionLeft_3 = 250

            Color(1, 1, 1, 1, mode='rgba')
            self.line_Left = Rectangle(pos=(300, 215), size=(1, 100))

            animate_left_line_01 = Animation(pos=(self.positionLeft_1, 215), t='out_circ')
            animate_left_line_02 = Animation(pos=(self.positionLeft_2, 215), t='out_circ')
            animate_left_line_03 = Animation(pos=(self.positionLeft_3, 215), t='out_circ')

            # START ANIMATION
            # MOVE TO POSITION 1
            animate_left_line_01.start(self.line_Left)

            # MOVE TO POSITION 2 AFTER 3 SECONDS
            animate_left_line_02.start(self.line_Left)
            
            # MOVE TO POSITION 3 AFTER 3 SECONDS
            animate_left_line_03.start(self.line_Left)



    def move(self):
        pass

    def update(self, dt):
        self.move()


class MainApp(App):

    def build(self):
        self.game = MyGrid()
        Clock.schedule_interval(self.game.update, 1.0 / 60.0)
        return self.game

    Window.size = (300, 530)
    Window.clearcolor = (0, 0, .5, 1)


if __name__ == "__main__":
    MainApp().run()

Answer 1

一种方法是使用Clock.schedule_once() 来安排每个动画：

class MyGrid(AnchorLayout):

    def __init__(self, **kwargs):
        super(MyGrid, self).__init__(**kwargs)
        self.inside = GridLayout()
        self.inside.cols = 12

        for letter in "CANVAS":
            self.inside.add_widget(Label(text=str(letter), color=[1, 1, 1, 1], font_size='80sp', ))

        self.add_widget(self.inside)

        # POSITIONS
        self.positionLeft_1 = 50
        self.positionLeft_2 = 150
        self.positionLeft_3 = 250

        with self.canvas:
            Color(1, 1, 1, 1, mode='rgba')
            self.line_Left = Rectangle(pos=(300, 215), size=(1, 100))


        # START ANIMATION
        Clock.schedule_once(self.anim1)
        Clock.schedule_once(self.anim2, 3)
        Clock.schedule_once(self.anim3, 6)



    def anim1(self, dt):
        # MOVE TO POSITION 1
        animate_left_line_01 = Animation(pos=(self.positionLeft_1, 215), t='out_circ')
        animate_left_line_01.start(self.line_Left)

    def anim2(self, dt):
        # MOVE TO POSITION 2
        animate_left_line_02 = Animation(pos=(self.positionLeft_2, 215), t='out_circ')
        animate_left_line_02.start(self.line_Left)

    def anim3(self, dt):
        # MOVE TO POSITION 3
        animate_left_line_03 = Animation(pos=(self.positionLeft_3, 215), t='out_circ')
        animate_left_line_03.start(self.line_Left)