save project

snake.py

@@ -13,16 +13,39 @@ 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
 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()
+        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
+    elif setheading=="left":
+        x-=30
+    elif setheading=="up":
+        y-=30
+    elif setheading=="down":
+        y+=30
     position.append((x,y))
     position.pop(0)
     # 将背景图画上去