为什么pygame窗口动画只有在我移动光标时才能工作

Question

我正在按照本指南制作flappy birdhttps://www.youtube.com/watch?v=UZg49z76cLw&t=1309秒但是只有当我移动光标时屏幕才会更新，有人知道如何修复这个吗

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

这是缩进的问题。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，事件循环仅在事件发生时执行，但应用程序循环是连续执行的。

Answer 2

我猜在您的函数中，当鼠标悬停在图像上时，或者当鼠标在时间t1的位置时，就会发生操作！=位置t2。还提供代码，以便我们可以检查可能存在的问题：(

https://www.pygame.org/docs/ref/mouse.html