auto save

snake.py

 import pygame
 import pygame
 from pygame import locals
 from pygame import locals
 
 
-# 初始化pygame，为使用硬件做准备
-pygame.init()
+pygame.init()    # 初始pygame，未使用硬件做准备
 
 
-# 创建一个窗口
-screen = pygame.display.set_mode((660, 480))
+background = pygame.image.load('bg.png') # 背景图
+right = pygame.image.load('right.png')   # 头 朝右
+food = pygame.image.load('apple.png')    # 食物 苹果  
+body = pygame.image.load('body.png')     # 蛇身
+left = pygame.image.load('left.png')
+up = pygame.image.load('up.png')
+down = pygame.image.load('down.png')
 
 
-# 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')
+screen = pygame.display.set_mode((660,480))  # 创建一个窗口
+FPSCLOCK = pygame.time.Clock()               # pygame时钟，控制游戏速度（帧数）
+x,y = 240,120       # 蛇头坐标
+position = [(180,90),(180,120),(210,120),(210,120),(x,y)]      #  用列表存储蛇头和蛇身的位置
+
+setheading = 'right'    # 蛇头方向
+snake_head = right      # 蛇头图片方向
 
 
 while True:
 while True:
     for event in pygame.event.get():
     for event in pygame.event.get():
+        #print(event)
         if event.type == locals.QUIT:
         if event.type == locals.QUIT:
-            # 接收到退出事件后退出程序
             exit()
             exit()
-    # 将背景图画上去
-    screen.blit(background, (0, 0))
-    # 将贪吃蛇画上去
-    screen.blit(right, (240, 120))
-    # 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))
-    # 将果实画上去
-    screen.blit(food, (360, 300))
-    # 刷新画面
-    pygame.display.update()
+        if event.type == locals.KEYDOWN:    # 判断获取到的事件的类型
+            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'
\ No newline at end of file
+                snake_head = down
+    if setheading == 'right':
+        x += 30
+    elif setheading == 'left':
+        x -= 30
+    elif setheading == 'up':
+        y -= 30
+    else:
+        y += 30
+    position.append((x,y))    # 蛇头刷新
+    position.pop(0)           # 蛇尾抛出
+
+    screen.blit(background,(0,0))            # 将背景图画上去
+    screen.blit(snake_head,position[-1])     # 渲染蛇头
+
+    for i in range(len(position)-1):         # 遍历写入蛇身坐标位置
+        screen.blit(body,position[i])
+
+    screen.blit(food,(330,360))
+    
+    pygame.display.update()     # 刷新画面
+    FPSCLOCK.tick(3)            # 控制时间，刷新帧数
+
+