如何在pygame上移动图像?

Question

我是pygame新手。我以前在Python上写过代码，但从来没有在pygame中写过。我已经编写了一个代码，当某些键被点击时播放声音，现在我试图在每次用户用鼠标点击时使图像移动。

import pygame, os, sys
pygame.init()
screen = pygame.display.set_mode((1300,1300))
screen.fill((250,250,250))
img = pygame.image.load(os.path.join(sys.path[0],"fonddecran.v1.jpg"))
screen.blit(img, (0, 0))
pygame.display.flip()
barrel=pygame.image.load(os.path.join(sys.path[0],"barrel-man.jpg"))
pygame.display.flip()
pygame.mixer.init()
it = true
while it:
for event in pygame.event.get():
if event.type == pygame.QUIT:
it=False
elif event.type == pygame.MOUSEBUTTONDOWN:
if event.button == 3:
pygame.mixer.music.load(os.path.join(sys.path[0],"Mi-mineur.mp3"))
pygame.mixer.music.play()
elif event.button == 1:
screen.blit(barrel,event.pos)
pygame.display.flip()
elif event.type == pygame.KEYUP:
if event.key == ord('b'):
pygame.mixer.music.load(os.path.join(sys.path[0],"Mi-mineur.mp3"))
pygame.mixer.music.play()
pygame.quit()

不幸的是，图像每次只出现一次。我如何删除它，使它看起来像已经移动了?

Answer 1

能够"移动";对于图像，你必须在每一帧中重新绘制场景。添加一个存储图像位置的变量。当您点击鼠标时，将变量更改为鼠标位置:

import pygame, os, sys
pygame.init()
screen = pygame.display.set_mode((1300,1300))
img = pygame.image.load(os.path.join(sys.path[0],"fonddecran.v1.jpg"))
barrel=pygame.image.load(os.path.join(sys.path[0],"barrel-man.jpg"))
pygame.mixer.init()
barrel_pos = None
it = True
while it:
for event in pygame.event.get():
if event.type == pygame.QUIT:
it=False
elif event.type == pygame.MOUSEBUTTONDOWN:
if event.button == 3:
pygame.mixer.music.load(os.path.join(sys.path[0],"Mi-mineur.mp3"))
pygame.mixer.music.play()
elif event.button == 1:
barrel_pos = event.pos
elif event.type == pygame.KEYUP:
if event.key == ord('b'):
pygame.mixer.music.load(os.path.join(sys.path[0],"Mi-mineur.mp3"))
pygame.mixer.music.play()
screen.fill((250,250,250))
screen.blit(img, (0, 0))
if barrel_pos:
screen.blit(barrel, barrel_pos)
pygame.display.flip()
pygame.quit()