第13步:现在我们需要计算按下向左键的次数。点击 LOGIC选项卡以查找工具。

当你添加一个指令到事件中,必须确保其前方具有一个 ····

global 关键字让我们能够更改事件内部变量的值

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stage.set_background("halfcourt") sprite = codesters.Sprite("player4") sprite.go_to(215, -175) net = codesters.Sprite("basketballnet") net.go_to(215, 175) ball = codesters.Sprite("basketball") x = random.randint(-100, 150) ball.go_to(x, -25) stage.set_gravity(10) stage.set_bounce(.8) ball.set_gravity_off() net.set_gravity_off() left_count = 0 down_count = 0 def left_key(): ball.move_left(10) # add other actions... stage.event_key("left", left_key)
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