暫停time.time流

Question

我使用Python和Pygame製作遊戲，並且我使用time.time來定時用戶瀏覽關卡。不過，我也有一個暫停菜單。當暫停菜單打開時，我怎麼能這樣做，time.time不會繼續？

Answer 1

我想我會這樣做：使用clock.tick()返回的時間來增加每個幀的計時器，如果遊戲沒有暫停，並且當用戶暫停並取消暫停遊戲時調用它，而沒有參數放棄遊戲暫停時所經過的時間。

import sys 
import pygame as pg 


pg.init() 
screen = pg.display.set_mode((640, 480)) 
clock = pg.time.Clock() 
font = pg.font.Font(None, 30) 
timer = 0 
dt = 0 
paused = False 
running = True 

while running: 
    for event in pg.event.get(): 
     if event.type == pg.QUIT: 
      running = False 
     elif event.type == pg.KEYDOWN: 
      paused = not paused 
      # This is needed to discard the time that 
      # passed while the game was paused. 
      clock.tick() 

    if not paused: 
     timer += dt # Add delta time to increase the timer. 

     screen.fill((30, 30, 30)) 
     txt = font.render(str(round(timer, 2)), True, (90, 120, 40)) 
     screen.blit(txt, (20, 20)) 

     pg.display.flip() 
     dt = clock.tick(30)/1000 # dt = time in seconds since last tick. 

pg.quit() 
sys.exit()