auto save

snake.py

@@ -18,13 +18,32 @@ x,y=240,120#初始坐标
 position=[(180,90),(180,120),(210,120),(x,y)]  #创建一个列表
 position=[(180,90),(180,120),(210,120),(x,y)]  #创建一个列表
 #             0        1          2       3
 #             0        1          2       3
 #            -4       -3         -2       -1
 #            -4       -3         -2       -1
-
+#setheading=='right'
 while True:
 while True:
     for event in pygame.event.get():
     for event in pygame.event.get():
         if event.type == locals.QUIT:
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             # 接收到退出事件后退出程序
             exit()
             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'
+    if setheading =="right":
         x+=30
         x+=30
+    elif setheading =="left":
+        x-=30    
+    elif setheading =="up":
+        y-=30
+    else:
+        y+=30
+
+
+  
     position.append((x,y))#在列表末尾追加一个坐标
     position.append((x,y))#在列表末尾追加一个坐标
     position.pop(0)#删除列表第一个坐标
     position.pop(0)#删除列表第一个坐标
     # 将背景图画上去
     # 将背景图画上去