python - Pygame:如何改变背景颜色

Question

import pygame, sys
pygame.init()
screen = pygame.display.set_mode([800,600])
white = [255, 255, 255]
red = [255, 0, 0]
screen.fill(white)
pygame.display.set_caption("My program")
pygame.display.flip()



background = input("What color would you like?: ")
if background == "red":
    screen.fill(red)

running = True
while running:
    for i in pygame.event.get():
        if i.type == pygame.QUIT:
        running = False
        pygame.quit()

我想问用户他想要什么背景颜色。如果用户写红色，颜色不会改变，仍然是白色。

Answer 1

下次更新显示时，它将重绘为红色。添加 pygame.display.update():

background = input("What color would you like?: ")
if background == "red":
    screen.fill(red)
    pygame.display.update()

或者，您可以将 pygame.display.flip() 移动到(有条件地)更改背景颜色之后。

另见 Difference between pygame.display.update and pygame.display.flip