python - 为什么pygame窗口动画只在我移动光标时起作用

Question

我正在按照本指南制作 flappy bird https://www.youtube.com/watch?v=UZg49z76cLw&t=1309s但是只有当我移动光标时屏幕才会更新有谁知道如何解决这个问题吗

import pygame, sys


def draw_floor():
    screen.blit(floor_surface, (floor_animation, 400))
    screen.blit(floor_surface, (floor_animation + 275,400))


pygame.init()

screen = pygame.display.set_mode((275,512))
clock = pygame.time.Clock()

bg_surface = pygame.image.load('C:/Users/cuerv/Downloads/flappy-bird-assets-master/flappy-bird-assets-master/sprites/background-day.png').convert()
floor_surface = pygame.image.load('C:/Users/cuerv/Downloads/flappy-bird-assets-master/flappy-bird-assets-master/sprites/base.png').convert()
floor_animation = 0

bird_surface = pygame.image.load('C:/Users/cuerv/Downloads/flappy-bird-assets-master/flappy-bird-assets-master/sprites/bluebird-midflap.png').convert()
bird_rect = bird_surface.get_rect(center = (100,256))

while True:
   
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
         
            pygame.quit()
            sys.exit()
        screen.blit(bg_surface, (0, 0))
        screen.blit(bird_surface, (bird_rect))
        
        floor_animation -= 1
        draw_floor()
        if floor_animation <= -275:
            floor_animation = 0            
        screen.blit(floor_surface, (floor_animation, 400))




    pygame.display.update()
    clock.tick(120)
    enter code here

Answer 1

这是Indentation的问题.在应用程序循环而不是事件循环中绘制场景:

# application loop
while True:
   
    # event loop
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
         
            pygame.quit()
            sys.exit()
    
    #<--| INDENTATION

    screen.blit(bg_surface, (0, 0))
    screen.blit(bird_surface, (bird_rect))     
    floor_animation -= 1
    draw_floor()
    if floor_animation <= -275:
        floor_animation = 0            
    screen.blit(floor_surface, (floor_animation, 400))

    pygame.display.update()

注意，事件循环只在事件发生时执行，而应用程序循环是连续执行的。