auto save

snake.py

@@ -8,6 +8,7 @@ x=240
 y=120
 # 创建一个窗口
 screen = pygame.display.set_mode((660, 480))
+setheading = "right"
 
 # 背景
 background = pygame.image.load('bg.png')
@@ -22,6 +23,16 @@ while True:
         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"
+
     # 将背景图画上去
     x += 30
     screen.blit(background, (0, 0))