save project

snake.py

@@ -17,11 +17,22 @@ body = pygame.image.load('body.png')
 x, y = 240, 120
 position=[(180,90),(180,120),(210,120),(x,y)]
 
+setheading="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:
+            if event.key==locals.K_RIGHT and setheading !="left":
+                setheading='right'
+            if event.key==locals.K_LEFT and setheading !="right":
+                setheading='left'
+            if event.key==locals.K_UP and setheading !="down":
+                setheading='up'
+            if event.key==locals.K_DOWN and setheading !="up":
+                setheading='down'       
     x+=30
     position.append((x,y))
     position.pop(0)