save project

snake.py

@@ -14,21 +14,37 @@ background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.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
 posion=[(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()
+        elif event.type==locals.KEYDOWN 
+            if event.key==localsK_RIGHT and setheading !="left":
+                setheading="right"
+            if event.key==localsK_LEFT and setheading !="right"
+                setheading="left"
+            if event.key==localsK_UP and setheading !="down"
+                setheading="down"
+            if event.key==localsK_DOWN and setheading !="up"
+                setheading="up"
     x+=30
     posion.append((x,y))
     posion.pop()
     screen.blit(right,posion[-1])
     for i in range(len(posion)-1):
         screen.blit(body,posion[i])
+    
 
     # 将背景图画上去
     screen.blit(background, (0, 0))