第22步:让石块出现得不那么频繁。

代码行 stage.event_interval(interval,·2) 是事件接听项。它告诉控制台每隔 2 秒运行一次间隔事件。数字控制事件运行的频率。

  • 将间隔运行的时间更改为 5 秒。

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stage.set_background("space") sprite = codesters.Sprite("spaceship") sprite.set_size(0.5) sprite.go_to(-200, 0) stage.set_gravity(10) stage.disable_all_walls() def space_bar(): sprite.jump(5) # add other actions... stage.event_key("space", space_bar) def interval(): top_height = random.randint(50, 300) # sprite = codesters.Sprite("image", x, y) top_rock = codesters.Sprite("asteroid", 300, 0) top_rock.set_height(top_height) top_rock.set_gravity_off() top_rock.set_y_speed(0) top_rock.set_top(250) bot_height = 350 - top_height bot_rock = codesters.Sprite("asteroid",300, 0) bot_rock.set_height(bot_height) bot_rock.set_gravity_off() bot_rock.set_y_speed(0) bot_rock.set_bottom(-250) top_rock.set_x_speed(-2) bot_rock.set_x_speed(-2) # add any other actions... stage.event_interval(interval, 2)
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