save project

snake.py

@@ -5,7 +5,7 @@ from pygame import locals
 pygame.init()
 x,y=240,120
 position=[(180,90),(180,120),(210,120),(x,y)]
-set
+setheading="right"
 # 创建一个窗口
 screen = pygame.display.set_mode((660, 480))
 
@@ -21,7 +21,23 @@ 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.type==locals.K_RIGHT and setheading!="left": 
+               setheading="right"
+           if event.type==locals.K_LEFT and setheading!="right":
+               setheading="left"
+           if event.type==locals.K_UP and setheading!="down": 
+               setheading="up"
+           if event.type==locals.K_DOWN and setheading!="up":
+               setheading="down"   
+    if setheading=="left":
+        x-=30
+    elif setheading=="right":
         x+=30
+    elif setheading=="up":
+        y-=30
+    else:
+        y+=30
     position.append((x,y))
     position.pop(0)
     # 将背景图画上去