auto save

snake.py

 import pygame
 from pygame import locals
+FPSCLOCK=pygame.time.Clock()
 
 # 初始化pygame，为使用硬件做准备
 pygame.init()
@@ -12,21 +13,65 @@ background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
+down= pygame.image.load('down.png')
+left = pygame.image.load('left.png')
+up = pygame.image.load('up.png')
+
+setheading = "right"
+snake_head = right
+
+
+x,y=240,120
+p=[(180,90),(180,120),(210,120),(x,y)]
+
 
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             exit()
+        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" 
+                snake_head = down
     # 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))
+    if setheading == "right":
+        x+=30 
+    elif setheading == "left":
+        x-=30                  
+    elif setheading == "up":
+        y-=30                      
+    else:
+        y+=30
+
+    p.append((x,y))
+    p.pop(0)
+
+    screen.blit(snake_head, (x, y))
+    x+=30
+    for i in range(len(p)-1):
+        screen.blit(body,p[i])
+
+    
+
+    # # 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()
\ No newline at end of file
+    pygame.display.update()
+    FPSCLOCK.tick(3)
+