auto save

snake.py

 import pygame
 from pygame import locals
+import random
 
-# 初始化pygame，为使用pygame做准备
+# 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((800,600))
+screen = pygame.display.set_mode((660, 480))
+FpsClock = 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')
+up = pygame.image.load('up.png')
+down = pygame.image.load('down.png')
+left = pygame.image.load('left.png')
+x,y=240,120
+position = [(180, 90),(180, 120),(210, 120),(x,y)]
+setheading = "right"
+snake_head  = right
+apple_x=360
+apple_y = 300
+
 
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
-            print(event)
+            # 接收到退出事件后退出程序
+            
             exit()
-  screen
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+        if event.type == locals.KEYDOWN:
+            if event.key== locals.K_RIGHT and setheading  != "left":
+                setheading = "right"
+                snake_head  = right
+        if event.type == locals.KEYDOWN:
+            if event.key== locals.K_LEFT and setheading != "right":
+                setheading = "left"
+                snake_head  = left
+        if event.type == locals.KEYDOWN:
+            if event.key== locals.K_UP and setheading != "down":
+                setheading = "up"
+                snake_head  = up
+        if event.type == locals.KEYDOWN:
+            if event.key== locals.K_DOWN and setheading != "up":
+                setheading = "down"
+                snake_head  = down
+    if setheading == 'right':
+        x+=30
+    if setheading == 'left':
+        x-=30
+    if setheading == 'up':
+        y-=30
+    if setheading == 'down':
+        y+=30
+    position.append((x,y))
+    if x == apple_x and y == apple_y:
+        apple_x = random.randint(0,22)*30
+        apple_y = random.randint(0,16)*30
+    position.pop(0)
+    # 将背景图画上去
+    screen.blit(background, (0, 0))
+    # 将贪吃蛇画上去
+    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 i in range (len(position)-1):
+        screen.blit(body , position[i])
+   
+    # 将果实画上去 
+    screen.blit(food, (apple_x, apple_y))
+    # 刷新画面
+    pygame.display.update()
+    FpsClock.tick(3)
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