auto save

snake.py

 import pygame
 from pygame import locals
+import random
 
 # 初始化pygame，为使用硬件做准备
 pygame.init()
@@ -7,26 +8,77 @@ pygame.init()
 # 创建一个窗口
 screen = pygame.display.set_mode((660, 480))
 
+
 # 背景
 background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
+left = pygame.image.load('left.png')
+down = pygame.image.load('down.png')
+up = pygame.image.load('up.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')
+head_x=240
+head_y=120
 
+FPSCOLOK=15
+FPSCLOCK = pygame.time.Clock()
+position=[(180,90),(180,120),(210,120),(head_x,head_y)]
+heading="right"
+snake_head = right
+apple_x=360
+apple_y=300
 while True:
+    
     for event in pygame.event.get():
-        if event.type == locals.QUIT:
+        if event.type == pygame.QUIT:
             # 接收到退出事件后退出程序
             exit()
+
+        if event.type == pygame.KEYDOWN:
+            if event.key == pygame.K_RIGHT and heading != "left":
+                heading = "right" 
+            if event.key == pygame.K_LEFT and heading != "right":
+                heading = "left" 
+            if event.key == pygame.K_DOWN and heading != "up":
+                heading = "down"
+            if event.key == pygame.K_UP and heading != "down":
+                heading = "up"  
+            
     # 将背景图画上去
     screen.blit(background, (0, 0))
+    screen.blit(food, (apple_x, apple_y))
+    
     # 将贪吃蛇画上去
-    screen.blit(right, (240, 120))
+    if heading =="right":
+        head_x +=30
+        snake_head = right
+    elif heading=="left":
+        head_x -=30
+        snake_head = left
+    elif heading=="down":
+        head_y +=30
+        snake_head = down
+    elif heading=="up":
+        head_y -=30
+        snake_head = up
+    if head_x == apple_x and head_y == apple_y:
+        apple_x=random.randint(0,21)*30
+        apple_y=random.randint(0,15)*30
+    else:
+        position.pop(0)
+    position.append((head_x,head_y))
+    
+    screen.blit(snake_head, position[-1])
     # 将贪吃蛇的身体画上去
-    screen.blit(body, (210, 120))
-    screen.blit(body, (180, 120))
-    screen.blit(body, (180, 90))
+    for index in range(len(position)-1):
+        screen.blit(body,position[index])
     # 将果实画上去
-    screen.blit(food, (360, 300))
+    
     # 刷新画面
-    pygame.display.update()
\ No newline at end of file
+    FPSCLOCK.tick(5)
+    pygame.display.update()
+
+