您必须调用
pg.display.flip()该
Menu函数。
我还对代码结构有一些建议。我将使用另一个函数或类（
main在这种情况下）来管理不同的场景。因此，我首先将当前场景函数分配给变量，然后在主while循环中调用它。场景完成后，我返回下一个场景并将其分配给
scene变量以交换场景。如果您直接从另一个场景中直接调用下一个函数，则可以避免潜在的递归错误（尽管在简单的游戏或应用中，您不可能超过1000的递归限制）。
import pygame as pgpg.init()screen = pg.display.set_mode((600, 400))clock = pg.time.Clock()BLUE = pg.Color('dodgerblue3')ORANGE = pg.Color('sienna3')def front_page(): while True: for event in pg.event.get(): if event.type == pg.QUIT: return None # Press a key to return the next scene. elif event.type == pg.KEYDOWN: return menu screen.fill(BLUE) pg.display.flip() clock.tick(60)def menu(): while True: for event in pg.event.get(): if event.type == pg.QUIT: return None # Press a key to return the next scene. elif event.type == pg.KEYDOWN: return front_page screen.fill(ORANGE) pg.display.flip() clock.tick(60)def main(): scene = front_page # Set the current scene. while scene is not None: # Execute the current scene function. When it's done # it returns either the next scene or None which we # assign to the scene variable. scene = scene()main()pg.quit()
