Python 3.x 当我将游戏设置为暂停时，如何停止计时器

我已经创造了这个游戏，它给你一个时间限制，让你杀死尽可能多的目标，你可以。下面是暂停和取消暂停游戏的代码部分。我遇到的问题是，当我暂停游戏时，设置时间限制的计时器仍在计数。我怎样才能阻止这一切

paused = False

def button(msg, msg_two, x, y, w, h, i, a, fontsize,  action=None):
    global paused
    mouse = pygame.mouse.get_pos()
    click = pygame.mouse.get_pressed()

    if  (x < mouse[0] < (x+450)) and (y < mouse[1]<(y+100)):
        pygame.draw.rect(gameDisplay, a, [x, y, w, h])
        largeText = pygame.font.Font('freesansbold.ttf',fontsize)
        TextSurf, TextRect = text_objects(msg, largeText, green)
        TextRect.center = ((x+(w/2)),(y+(h/2)))
        gameDisplay.blit(TextSurf, TextRect)
        if click[0] == 1 and action != None:
            if action == "play":
                gameloop()
            elif action == "quit":
                game_quit()
            elif action == "pause":
                paused = True
                pause()
            elif action == "unpause":
                unpause()

    else:
        pygame.draw.rect(gameDisplay, i, [x, y, w, h])
        largeText = pygame.font.Font('freesansbold.ttf',fontsize)
        TextSurf, TextRect = text_objects(msg_two, largeText, green)
        TextRect.center = ((x+(w/2)),(y+(h/2)))
        gameDisplay.blit(TextSurf, TextRect)

def game_quit():
    pygame.quit()
    quit()

def unpause():
    global paused
    paused = False

def pause():

    pygame.mouse.set_visible(1)

    button_x = (display_width/4)-150
    button_y = display_height/1.5
    button_width = 450
    button_height = 100


    while paused:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                quit()


        gameDisplay.fill(white)
        largeText = pygame.font.Font('freesansbold.ttf',72)
        TextSurf, TextRect = text_objects('paused', largeText, red)
        TextRect.center = ((display_width/2),(display_height/3))
        gameDisplay.blit(TextSurf, TextRect)

        mouse = pygame.mouse.get_pos()

        button("let's go", "carry on", button_x, button_y, button_width, button_height, blue, light_blue, 70,  "unpause")
        button("Bye then :(", "Leaving?", button_x+600, button_y, button_width, button_height, red, light_red, 70,  "quit")

        pygame.display.update()
        clock.tick(15)

def gameloop():

    gameExit = False

    start = time.time()

    elapsed = 0

    while not gameExit and elapsed < 30:
        button("Stop", "Stop", 1550, 0, 50, 50, red, light_red, 15, "pause")
        elapsed = time.time() - start - (enemy_kills/2)
    gameloop()

def game_intro():
    pygame.mouse.set_visible(1)

    button_x = (display_width/4)-150
    button_y = display_height/1.5
    button_width = 450
    button_height = 100

    intro = True

    while intro:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                quit()


        gameDisplay.fill(white)
        largeText = pygame.font.Font('freesansbold.ttf',72)
        TextSurf, TextRect = text_objects('Shoot Hitler and not trump', largeText, red)
        TextRect.center = ((display_width/2),(display_height/3))
        gameDisplay.blit(TextSurf, TextRect)

        mouse = pygame.mouse.get_pos()

        button("let's go", "wanna play?", button_x, button_y, button_width, button_height, blue, light_blue, 70,  "play")
        button("Bye then :(", "wanna quit?", button_x+600, button_y, button_width, button_height, red, light_red, 70,  "quit")

        pygame.display.update()
        clock.tick(15)

game_intro()

paused=False
def按钮（msg、msg_two、x、y、w、h、i、a、fontsize、action=None）：
全局暂停
mouse=pygame.mouse.get_pos（）
click=pygame.mouse.get_pressed（）
如果（x
例如，您在
gameloop
函数末尾回调
gameloop（）
，这会创建一个递归调用，该调用不应该是递归的

无论如何，您应该将这些函数中的大部分移动到一个类中，这样一些状态变量（如
paused
）就可以成为该类的属性。该类的实例就是游戏

在这种情况下，您的“start”变量也将成为一个属性，以便可以在
unpause
方法中对其进行修改

然后，您可以计算暂停时间的数量，并将该数量添加到“开始”刻度计数中

或者，您可以将
start
作为一个全局变量，继续使用当前模式。由于我不是为了回答问题而重新组织您的所有代码，因此，让事情或多或少保持原样需要您执行以下操作：

def gameloop():
    global start
    ...

def pause():
   global pause_start
   pause_start = time.time()
   ...

def unpause():
   global start, pause_start
   pause_duration = time.time() - pause_start
   start += pause_duration
   ...