save project

snake.py

@@ -12,15 +12,41 @@ background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
+up=pygame.image.load('up.png')
+down=pygame.image.load('down.png')
+left=pygame.image.load('left.png')
 x,y=240,120
 position=[(180, 90),(180, 120),(210, 120),(x,y)]
+setheading="right"
+snake_haed=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()
-        x+=30
+        elif event.type == locals.KEYDOWN:
+            if event.type == locals.K_RIGHT and setheading!="left":
+                setheading="right"
+                snake_haed=right
+            if event.type == locals.K_RIGHT and setheading!="up":
+                 setheading="down"
+                 snake_haed=down
+            if event.type == locals.K_RIGHT and setheading!="right":
+                 setheading="left"
+                 snake_haed=left
+            if event.type == locals.K_RIGHT and setheading!="down":
+                 setheading="up"
+                 snake_haed=up
+
+        if setheading="right":
+            x+=30
+        elif setheading="left":
+            x-=30
+        elif setheading="up":
+            y-=30
+        else
+            y+=30
     position.append((x,y))
     position.pop(0)
     # 将背景图画上去