auto save

snake.py

@@ -12,30 +12,40 @@ background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
-
+up = pygame.image.load('up.png')
+down = pygame.image.load('down.png')
+left = pygame.image.load('left.png')
 x,y=240,120
 position=[(180.90),(180,120),(210,120),(x,y)]
 
 setheading = "right"
+snake_head = right
 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:
+        elif 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
     if setheading == "right":
         x += 30
     if setheading == "left":
         x -= 30
-    if setheading == ""
+    if setheading == "up":
+        y -= 30
+    if setheading == "down":
+        y += 30
     position.append((x,y))
     position.pop(0)
     # 将背景图画上去