我想请您帮助解决我的这个问题。我只需要使用pygame中的函数（无类）来开发游戏。
我已经可以运行游戏了，但是动画或精灵没有按预期更新。在移动时应更改的图像始终保持不变。
我在做什么错？
代码如下：
import pygame
WIDTH = 800
HEIGHT= 600
pygame.display.set_caption("Nico's worst adventure")
window = pygame.display.set_mode((WIDTH, HEIGHT))
#Color #R #G #B
White = (255, 255, 255)
Black = (0, 0, 0)
Red = (255, 0, 0)
Blue = (0, 0, 255)
#Position
x = 50
y = 425
imageWidth = 64
vel = 5 #Velocity of movement
isJumping = False
jumpCount = 10
left = False
right = False
walkCount = 0
#Image port
walkRight = [pygame.image.load('Nico right(1).png'), pygame.image.load('Nico right(2).png'), pygame.image.load('Nico right(3).png'), pygame.image.load('Nico right(4).png')]
walkLeft = [pygame.image.load('Nico left(1).png'), pygame.image.load('Nico left(2).png'), pygame.image.load('Nico left(3).png'), pygame.image.load('Nico left(4).png')]
still = pygame.image.load('Nico still.png')
backgorund = pygame.image.load('Fondo.png')
def drawCharacter():
global walkCount
window.blit(backgorund, (0,0))
if walkCount + 1 >= 12:
walkCount = 0
if left:
window.blit(walkLeft[walkCount//3], (x, y))
walkCount += 1
elif right:
window.blit(walkRight[walkCount//3], (x, y))
walkCount += 1
else:
window.blit(still, (x, y))
pygame.display.update()
def draw():
global imageWidth
global WIDTH
global x
global y
global vel
global jumpCount
global isJumping
clock = pygame.time.Clock()
play = True
#Main loop
while play:
clock.tick(27)
pygame.init()
for event in pygame.event.get():
if event.type == pygame.QUIT:
play = False
key = pygame.key.get_pressed()
if key[pygame.K_LEFT] and x > vel:
x -= vel
left = True
right = False
elif key[pygame.K_RIGHT] and x < WIDTH - imageWidth - vel:
x += vel
right = True
left = False
else:
right = False
left = False
walkCount = 0
if not(isJumping):
if key[pygame.K_SPACE]:
isJumping = True
right = False
left = False
walkCount = 0
else:
if jumpCount >= -10:
neg = 1
if jumpCount < 0:
neg = -1
y -= (jumpCount ** 2) * 0.5 * neg
jumpCount -= 1
else:
isJumping = False
jumpCount = 10
drawCharacter()
pygame.display.flip()
pygame.quit()
draw()
我已经检查过并将其与其他代码进行比较，但是我只是找不到真正的问题。
答案 0 :(得分：1)
这是因为left函数中的right和draw是局部变量，而不是全局变量。
一个简单的解决方法是添加
global left
global right
draw的开头。
我只需要使用pygame中的功能（无类）来开发游戏
鉴于pygame本身包含了很多类，而您已经使用了其中一些类，因此这是一个奇怪的要求。
答案 1 :(得分：1)
已经提到了简单的修复方法，但是我宁愿建议完全摆脱全局变量，而只是使用主循环将它们移入函数以使其局部化。
此外，drawCharacter函数不应该负责更新walkCount以及为图像加斑点。我将其删除并更新walkCount子句中的if key[pygame.K_LEFT]...，然后使用它将当前播放器图像分配给变量（player_image），您可以在以后的绘图中将其变白。部分。这样一来，您还可以摆脱left和right变量。
drawCharacter函数将仅由这两行组成，
window.blit(background, (0, 0))
window.blit(player_image, (x, y))
所以您也可以在主循环中简单地调用它们，而不用在函数中调用它们（必须将这些参数传递给它们）。
顺便说一句，在加载图像时调用convert或convert_alpha方法以提高性能。
这是更新的代码：
import pygame
pygame.init()
WIDTH = 800
HEIGHT= 600
pygame.display.set_caption("Nico's worst adventure")
window = pygame.display.set_mode((WIDTH, HEIGHT))
White = (255, 255, 255)
Black = (0, 0, 0)
Red = (255, 0, 0)
Blue = (0, 0, 255)
# Images (I assume you're using pictures with a transparent background
# so I call the `convert_alpha` method).
walkRight = [
pygame.image.load('Nico right(1).png').convert_alpha(),
pygame.image.load('Nico right(2).png').convert_alpha(),
pygame.image.load('Nico right(3).png').convert_alpha(),
pygame.image.load('Nico right(4).png').convert_alpha(),
]
walkLeft = [
pygame.image.load('Nico left(1).png').convert_alpha(),
pygame.image.load('Nico left(2).png').convert_alpha(),
pygame.image.load('Nico left(3).png').convert_alpha(),
pygame.image.load('Nico left(4).png').convert_alpha(),
]
still = pygame.image.load('Nico still.png').convert_alpha()
background = pygame.image.load('Fondo.png').convert()
def game():
clock = pygame.time.Clock()
# Player related variables.
x = 50
y = 425
imageWidth = 64
vel = 5
isJumping = False
jumpCount = 10
walkCount = 0
player_image = still # Assign the current image to a variable.
play = True
while play:
clock.tick(27)
for event in pygame.event.get():
if event.type == pygame.QUIT:
play = False
key = pygame.key.get_pressed()
if key[pygame.K_LEFT] and x > vel:
x -= vel
# Update the walkCount and image here.
walkCount += 1
player_image = walkRight[walkCount//3]
elif key[pygame.K_RIGHT] and x < WIDTH - imageWidth - vel:
x += vel
walkCount += 1
player_image = walkLeft[walkCount//3]
else:
player_image = still
walkCount = 0
if walkCount + 1 >= 12:
walkCount = 0
if not isJumping:
if key[pygame.K_SPACE]:
isJumping = True
walkCount = 0
else:
if jumpCount >= -10:
neg = 1
if jumpCount < 0:
neg = -1
y -= (jumpCount ** 2) * 0.5 * neg
jumpCount -= 1
else:
isJumping = False
jumpCount = 10
window.blit(background, (0, 0))
window.blit(player_image, (x, y)) # Just blit the current image.
pygame.display.flip() # Only one `flip()` or `update()` call per frame.
game()
pygame.quit()