save project

snake.py

@@ -16,12 +16,30 @@ body = pygame.image.load('body.png')
 
 x,y=240,120
 position=[(210, 120),(180, 120),(180, 90),(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()
-    x+=30
+        if event.type==locals.KEYDOWN:
+            if event.key==locals.K_RIGHT and setheading !="left":
+                setheading='right'
+            elif event.key==locals.K_UP and setheading !="down":
+                setheading='up'
+            elif event.key==locals.K_LEFT and setheading !="right":
+                setheading='left'
+            elif event.key==locals.K_DOWN and setheading !="up":
+                setheading='down'
+    if setheading=='down':
+        y+=30
+    elif setheading=='up':
+        y-=30
+    elif setheading=='right':
+        x+=30
+    elif setheading=='left':
+        x-=30
+
     position.append((x,y))
     position.pop(0)
     # 将背景图画上去