從遊戲切換到菜單，然後創建滯後

Question

遊戲開始以正確的速度運行。然而，當我按下退出鍵並返回到主菜單，然後返回遊戲時，遊戲會產生一點滯後（與當我將遊戲移到屏幕上並返回主菜單並開始遊戲時相同）。當我一遍又一遍地做這件事時，它會造成越來越多的滯後。

在更多的「編碼」術語中，當我按下菜單上的「開始」時，它會調用reset（），它重置所有精靈的位置。當遊戲結束時，它將遊戲顯示在屏幕上，然後用戶按下退出鍵返回到菜單。

menuOn = 1 
Rooms = [] 
running = True #Flags game as on 
screen = None 
(x1, y1) = (0, 0) 
(x2, y2) = (0, -screenHeight) 
allsprites = pygame.sprite.Group() 
clock = pygame.time.Clock() 

def placeholder1(screen): 
    Rooms = [] 
    Rooms.append(Room()) 
    global menuOn 
    menuOn = 0 
    pass 

class Menu(object): 
    def __init__(self,screen): 
     self.screen = screen 
     self.title = startMenu 
     self.menu = genmenu(['START', lambda: placeholder1(screen)],['INFO', lambda: placeholder2(screen)], ['QUIT', lambda: quit()]) 
     self.clock = pygame.time.Clock() 
     event = pygame.event.get() 
     self.menu.create(self.screen) 
     self.menu.choose(event) 
     self.main_loop() 

    def main_loop(self): 
     while menuOn == 1: 
      self.clock.tick(60) 
      events = pygame.event.get() 
      self.menu.choose(events) 
      self.screen.blit(self.title, (0, 0)) 
      self.menu.create(self.screen) 
      pygame.display.flip() 

class Room(): 
    def __init__(self): 
     global wall, player, redFish, redfishes, greenFish, greenfishes, sharks, shark 
     for x in range(29): 
      wall = Wall() 
      wall.rect.topleft = (x*32,0) #top walls 
      walls.append(wall) 
     for x in range(29): 
      wall = Wall() 
      wall.rect.topleft = (x*32,screenHeight-32) #bottom walls 
      walls.append(wall) 
     for y in range(17): 
      wall = Wall() 
      wall.rect.topleft = (0, (y*32)+32) #left walls 
      walls.append(wall) 
     for y in range(17): 
      wall = Wall() 
      wall.rect.topleft = (screenWidth-32, (y*32)+32) #right walls 
      walls.append(wall) 
     reset() 
def reset(): 
    global playerpos 
    playerpos = [screenWidth/2, screenHeight/2] 
    player.rect.topleft = (playerpos[0], playerpos[1]) 
    for greenFish in greenfishes: 
     greenFish.image = images["spr_greenfish"] 
     greenScoreList[greenfishes.index(greenFish)] = 0 
     greenFish.rect.topleft = random.randint(35,screenWidth-80),random.randint(35,screenHeight-80) 
    for redFish in redfishes: 
     redFish.rect.topleft = random.randint(35,screenWidth-80),random.randint(35,screenHeight-80) 
    sharks[0].rect.topleft = (100, 500) 
    sharks[1].rect.topleft = (300, 500) 
    sharks[2].rect.topleft = (500, 500) 
    sharks[3].rect.topleft = (700, 500) 
while running: 
    clock.tick(60) 
    if menuOn == 1: 
     Menu(screen) 
    elif menuOn == 2: 
     GameOver(screen) 
    for event in pygame.event.get(): 
     if event.type == QUIT: 
      running = False 
     if event.type == pygame.KEYDOWN: 
      if event.key == K_ESCAPE: 
       updateScoreToScreen(score) 
       menuOn = 1 
       reset() 
    allsprites.update() 
    screen.blit(ground, (0,screenHeight-100)) 
    allsprites.draw(screen) 
    pygame.display.update() 

Answer 1

多虧了評論，解決的辦法是把： 全球牆壁 牆壁= []在功能PLACEHOLDER1 。謝謝！