auto save

snake.py

 import pygame
 import pygame
 from pygame import locals
 from pygame import locals
+pygame.init()#初始化
 
 
-# 初始化pygame，为使用硬件做准备
-pygame.init()
+screen = pygame.display.set_mode((800,600))#创建一个窗口
+FPSCLOCK = pygame.time.Clock() #pygame时钟，控制游戏速度（帧数） 
 
 
-# 创建一个窗口
-screen = pygame.display.set_mode((660, 480))
-
-# 背景
-background = pygame.image.load('bg.png')
+#载入图片
+bg = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 right = pygame.image.load('right.png')
-food = pygame.image.load('apple.png')
+apple = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
 body = pygame.image.load('body.png')
+left = pygame.image.load('left.png')
+up = pygame.image.load('up.png')
+down = pygame.image.load('down.png')
+
+x,y = 240,120 #初始化蛇头坐标
+setheading = 'right'
+snake_head = right
 
 
+position = [(180,90),(180,120),(210,120),(x,y)]
 while True:
 while True:
+    
     for event in pygame.event.get():
     for event in pygame.event.get():
         if event.type == locals.QUIT:
         if event.type == locals.QUIT:
-            # 接收到退出事件后退出程序
+            #接收到退出事件后退出程序
             exit()
             exit()
-    # 将背景图画上去
-    screen.blit(background, (0, 0))
-    # 将贪吃蛇画上去
-    screen.blit(right, (240, 120))
-    # 将贪吃蛇的身体画上去
-    screen.blit(body, (210, 120))
-    screen.blit(body, (180, 120))
-    screen.blit(body, (180, 90))
-    # 将果实画上去
-    screen.blit(food, (360, 300))
-    # 刷新画面
-    pygame.display.update()
+        if event.type == locals.KEYDOWN:
+            if event.key == locals.K_RIGHT and setheading!= 'left':
+                setheading = 'right'
+                snake_head = right
+            if event.key == locals.K_LEFT and setheading!= 'right':
+                setheading = 'left'
+                snake_head = left
+            if event.key == locals.K_UP and setheading!= 'DOWN':
+                setheading = 'up'
+                snake_head = up
+            if event.key == locals.K_DOWN and setheading!= 'up':
+                setheading = 'down'
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+                snake_head = down
+        #设置头部坐标
+        if setheading == 'right':
+            x += 30
+        elif setheading == 'left':
+            x -= 30
+        elif setheading == 'up':
+            y -= 30
+        else:
+            y += 30
+            
+            
+        position.append((x,y))
+        position.pop(0)
+   
+    screen.blit(bg,(0,0))#插入背景
+    screen.blit(snake_head,position[-1])#插入蛇头，向右
+    for i in range(len(position)-1):#插入身体
+        screen.blit(body,position[i])
+    screen.blit(apple,(360,300))#插入苹果
+    #刷新
+    pygame.display.update()
+    
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