save project

snake.py

 import pygame
 from pygame import locals
-
-# 初始化pygame，为使用硬件做准备
 pygame.init()
 
 # 创建一个窗口
 screen = pygame.display.set_mode((660, 480))
 z=pygame.time.Clock()
 # 背景
+
 background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
+left=pygame.image.load('left.png')
+up=pygame.image.load('up.png')
+down=pygame.image.load('down.png')
+setheading="right"
+snakeh=right
 x,y=240,120
 p=[(180, 90),(180, 120),(210, 120),(x,y)]
 while True:
@@ -19,13 +23,33 @@ while True:
         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_UP and setheading!="down":
+                setheading="up"
+                snakeh=up
+            if event.key == locals.K_DOWN and setheading!="up":
+                setheading="down"
+                snakeh=down
+            if event.key == locals.K_RIGHT and setheading!="left":
+                setheading="right"
+                snakeh=right
+            if event.key == locals.K_LEFT and setheading!="right":
+                setheading="left"
+                snakeh=left
+    if setheading=="right":
+        x+=30
+    elif setheading=="left":
+        x-=30
+    elif setheading=="up":
+        y-=30
+    else:
+        y+=30
     p.append((x,y))
     p.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right, p[-1])
+    screen.blit(snakeh, p[-1])
     # 将贪吃蛇的身体画上去
     for i in range(len(p)-1):
         screen.blit(body,p[i])