auto save

snake.py

@@ -23,16 +23,16 @@ while True:
             # 接收到退出事件后退出程序
             exit()
         if event.type==locals.KEYDOWN:
-            if event.key==locals.K_UP and setheading!='down':
+            if event.key==locals.K_UP :
                 setheading='up'
                 snake_head=up
-            if event.key==locals.K_DOWN and setheading!='up':
+            if event.key==locals.K_DOWN:
                 setheading='down'
                 snake_head=down
-            if event.key==locals.K_RIGHT and setheading!='left':
+            if event.key==locals.K_RIGHT :
                 setheading='right'
                 snake_head=right
-            if event.key==locals.K_LEFT and setheading!='right':
+            if event.key==locals.K_LEFT:
                 setheading='left'
                 snake_head=left
     if setheading=='right':
@@ -47,11 +47,11 @@ while True:
     position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
-    # 将贪吃蛇画上去
-    screen.blit(snake_head,position[-1])
     # 将贪吃蛇的身体画上去
     for i in range(len(position)-1):
         screen.blit(body,position[i])
+     # 将贪吃蛇画上去
+    screen.blit(snake_head,position[-1])
     # 将果实画上去
     screen.blit(food, (360, 300))
     # 刷新画面