save project

snake.py

@@ -16,23 +16,42 @@ body = pygame.image.load('body.png')
 x, y = 240, 120
 position = [(180, 90), (180, 120), (210, 120), (x, y)]
 
+setneading = "right"
+snake_head = right
 
 while True:
-    for event in pygame.event.get():
+    for  event in pygame.event.get():
         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":
-            if event.key      
-    x += 30
+               setneading = 'right'
+               snake_head = right
+            if event.key == locals.K_RIGHT and setheading !="right":
+               setneading = 'left'
+               snake_head = left
+            if event.key == locals.K_RIGHT and setheading !="down":
+               setneading = 'up'
+               snake_head = up
+            if event.key == locals.K_RIGHT and setheading !="up":
+               setneading = 'down'
+               snake_head = down
+    if setheading == "right":
+        x +=30
+    elif setheading == "left":
+        x -= 30
+    elif setheading == "up":
+        y -= 30
+    elif setheading == "down":
+        y += 30
     position.append((x, y))
     position.pop(0)
 
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right, position[-1])
+    screen.blit(snake_head, position[-1])
     for i in range(len(position)-1):
         screen.blit(body, position[i])
     # 将贪吃蛇的身体画上去