save project

snake.py

 import pygame
 from pygame import locals
 
+snake_setheading = "right"
 # 初始化pygame，为使用硬件做准备
 pygame.init()
 
@@ -14,32 +15,53 @@ background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
-position = [(180,90),(180,120),(210,120),(x,y)]
+position = [(150,120),(180,120),(210,120),(x,y)]
+snake_head = pygame.image.load('right.png')
 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_UP and snake_setheading != "down":
+                snake_setheading = 'up'
+                snake_head = pygame.image.load('up.png')
+            if event.key == locals.K_RIGHT and snake_setheading != "left":
+                snake_setheading = 'right'
+                snake_head = pygame.image.load('right.png')
+            if event.key == locals.K_DOWN and snake_setheading != "up":
+                snake_setheading = 'down'
+                snake_head = pygame.image.load('down.png')
+            if event.key == locals.K_LEFT and snake_setheading != "right":
+                snake_setheading = 'left'
+                snake_head = pygame.image.load('left.png')
+    
     
-    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
-
+    if snake_setheading == 'right':
+        x+=30
+    if snake_setheading == 'left':
+        x-=30
+    if snake_setheading == 'up':
+        y-=30
+    if snake_setheading == 'down':
+        y+=30
     
     # 将贪吃蛇的身体画上去
-    for i in range(len(position)):
-        screen.blit(body,position[i])
-        screen.blit(right,position[len(position)-1])
+    for i in range(1,len(position)):
+        screen.blit(body,position[i-1])
+        screen.blit(snake_head,position[len(position)-1])
+    position.append((x,y))
+    position.pop(0)
     # 将果实画上去
     screen.blit(food, (360, 300))
     #y+=30
     #screen.blit(right, (240, y))
     # 刷新画面
     pygame.display.update()
-    FPSCLOCK.tick(3)
+    FPSCLOCK.tick(5)
     
     #screen.blit(body, (210, 120))
     #screen.blit(body, (180, 120))