auto save

snake.py

@@ -3,30 +3,63 @@ from pygame import locals
 
 # 初始化pygame，为使用硬件做准备
 pygame.init()
-
+SZ = pygame.time.Clock()   #创建时钟
 # 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')
+right = pygame.image.load('right.png')  #向右
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
+left = pygame.image.load('left.png')   #向左
+up = pygame.image.load('up.png')    #向上
+down = pygame.image.load('down.png')    #向下
+x , y = 240, 120  #创建两个变量x, y
+wz = [(x - 90, y), (x - 60, y), (x-30, y), (x, y)]  #蛇头和蛇身的初始位置
+fx = "s"  #方向 s, x , z , y
+st = right    #蛇头设置
 
 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()
+        if event.type == locals.KEYDOWN:
+            if event.key == locals.K_LEFT and fx!= "y":
+                fx = "z"
+                st = left
+            if event.key == locals.K_RIGHT and fx!= "z":
+                fx = "y"
+                st = right
+            if event.key == locals.K_UP and fx!= "x":
+                fx = "s"
+                st = up
+            if event.key == locals.K_DOWN and fx!= "s":
+                fx = "x"
+                st = down
+    
+    if fx=="s":
+        y = y - 30
+    elif fx=="x":
+        y = y + 30
+    elif fx=="z":
+        x = x - 30
+    else:
+        x = x + 30
+
+    wz.append((x,y))   #把蛇头新的位置加入列表
+    wz.pop(0)    #把原来蛇尾的位置坐标扔掉     
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right, (240, 120))
+    screen.blit(st, (x, y))   #把新的蛇头显示出来
     # 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(wz) - 1):    #画出蛇身，数量为列表长度-1
+        screen.blit(body, wz[i])
+    
     # 将果实画上去
     screen.blit(food, (360, 300))
     # 刷新画面
-    pygame.display.update()
\ No newline at end of file
+    pygame.display.update()
+    SZ.tick(3)
\ No newline at end of file