我想知道为什么我的playerIMG无法在pygame中加载

下面是我的代码，这是我的第一个 pygame 项目，任何帮助将不胜感激！ 我认为这与

def 玩家（玩家，玩家）：
pygame.display.update()

代码块。尽管当我使用它时，有时它甚至不会显示我的背景对象，而只显示屏幕填充黑色。

import pygame

#initializing the game
pygame.init()

FPS = 60
black = (0,0,0)
white = (255,255,255)

#creating the screen and setting the size
gameDisplay = pygame.display.set_mode((800,600))

#setting the title of the window
pygame.display.set_caption('Space Crashers')

#going into our files and loading the image for the background
background = pygame.image.load(r'C:\\Users\\ahmad\\Downloads\\pygame projects\\Assets\\newBackground.jpg')

#player image and model
playerImg = pygame.image.load(r'C:\\Users\\ahmad\\Downloads\\pygame projects\\Assets\\blueShip.png')
#these cords are for the player ship to be in the middle of the screen
playerX = 370
playerY = 480

#creating player function
def player(x,y):
    gameDisplay.blit(playerImg, (x,y))




# window creation
clock = pygame.time.Clock()
running = True
while running:
    
     #setting the background to black
    gameDisplay.fill(black)
   
    #then changing the background to the image we loaded
    gameDisplay.blit(background,(0,0))
    
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
             running = False
    pygame.display.update() 
    
        # if the keystroke is pressed, the player will move
    if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT:
                playerX -= .01
            if event.key == pygame.K_RIGHT:
                playerX += .01
            if event.key == pygame.K_UP:
                playerY -= .01
            if event.key == pygame.K_DOWN:
                playerY += .01
    
    
    
               
def player(playerX,playerY):         
        pygame.display.update()             
clock.tick(FPS)   
pygame.quit()
quit()

See 按住键时如何使精灵移动 https://stackoverflow.com/questions/9961563/how-can-i-make-a-sprite-move-when-key-is-held-down。还了解缩进 https://docs.python.org/3/reference/lexical_analysis.html。您的代码必须具有正确的缩进才能正常工作。

典型的 PyGame 应用程序循环必须：

• 限制每秒帧数以限制 CPU 使用率pygame.time.Clock.tick https://www.pygame.org/docs/ref/time.html#pygame.time.Clock
• 通过调用以下任一方法处理事件pygame.event.pump() https://www.pygame.org/docs/ref/event.html#pygame.event.pump or pygame.event.get() https://www.pygame.org/docs/ref/event.html#pygame.event.get.
• 根据输入事件和时间（分别为帧）更新游戏状态和对象位置
• 清除整个显示或绘制背景
• 绘制整个场景（blit所有对象）
• 通过调用更新显示pygame.display.update() https://www.pygame.org/docs/ref/display.html#pygame.display.update or pygame.display.flip() https://www.pygame.org/docs/ref/display.html#pygame.display.flip

import pygame

#initializing the game
pygame.init()

FPS = 60
black = (0,0,0)
white = (255,255,255)

#creating the screen and setting the size
gameDisplay = pygame.display.set_mode((800,600))

#setting the title of the window
pygame.display.set_caption('Space Crashers')

#going into our files and loading the image for the background
background = pygame.image.load(r'C:\\Users\\ahmad\\Downloads\\pygame projects\\Assets\\newBackground.jpg')

#player image and model
playerImg = pygame.image.load(r'C:\\Users\\ahmad\\Downloads\\pygame projects\\Assets\\blueShip.png')
#these cords are for the player ship to be in the middle of the screen
playerX = 370
playerY = 480

# creating player function
def player(x,y):
    gameDisplay.blit(playerImg, (x,y))

# application loop
clock = pygame.time.Clock()
running = True
while running:
    
    # handle the events 
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
             running = False

    # update the game states and positions of objects
    keys = pygame.key.get_pressed()
    playerX += (keys[pygame.K_RIGHT] - keys[pygame.K_LEFT])  * 3
    playerY += (keys[pygame.K_DOWN] - keys[pygame.K_UP]) * 3

    # clear the entire display or draw the background
    gameDisplay.fill(black)
    gameDisplay.blit(background,(0,0))

    # draw the entire scene (blit all the objects)
    player(playerX, playerY)
    
    # update the display 
    pygame.display.update()  

    # limit the frames per second to limit CPU usage with
    clock.tick(FPS)   

pygame.quit()
quit()