save project

snake.py

@@ -14,11 +14,21 @@ food = pygame.image.load('apple.png')
 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
     # 将背景图画上去
     position.append((x,y))