save project

snake.py

@@ -12,13 +12,38 @@ 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_RLGHT 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=="up"         
+    x -=30
+if setheading=="down"         
     x +=30
     position.append((x,y))
     position.pop(0)