save project

snake.py

@@ -2,6 +2,7 @@ import pygame
 from pygame import locals
 x=240
 y=120
+setheading='right'
 # 初始化pygame，为使用硬件做准备
 pygame.init()
 shijian=pygame.time.Clock()
@@ -13,19 +14,43 @@ 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')
 pos=[(180,90),(180,120),(210,120),(x,y)]
+snake_head = right
 while True:
     for event in pygame.event.get():
         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_RIGHT and setheading != "left":
+                setheading='right'
+                snake_head=right
+            if event.key == locals.K_LEFT and setheading != "right":
+                setheading='left'
+                snake_head=left
+            if event.key == locals.K_UP and setheading != "down":
+                setheading='up'
+                snake_head=up
+            if event.key == locals.K_DOWN and setheading != "up":
+                setheading='down'
+                snake_head=down
+    if setheading=="right":
+        x+=30
+    elif setheading=="left":
+        x-=30
+    elif setheading=="up":
+        y-=30
+    else:
+        y+=30
     pos.append((x,y))
     pos.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right, (x,y))
+    screen.blit(snake_head, (x,y))
     # 将贪吃蛇的身体画上去
     for i in range(3):
         screen.blit(body, pos[i])