save project

snake.py

 import pygame
 import pygame
 from pygame import locals
 from pygame import locals
 
 
-x,y=240,120
-position=[(180,90),(180,120),(210,120),(x,y)]
-
 # 初始化pygame，为使用硬件做准备
 # 初始化pygame，为使用硬件做准备
 pygame.init()
 pygame.init()
 
 
@@ -15,19 +12,50 @@ background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.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')
+
+x,y=240,120
+position=[(180,90),(180,120),(210,120),(x,y)]
+
+setheading='right'
+snake_head=right
 
 
 while True:
 while True:
-    x+=30
-    position.append((x,y))
-    position.pop(0)
+    
     for event in pygame.event.get():
     for event in pygame.event.get():
         if event.type == locals.QUIT:
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             # 接收到退出事件后退出程序
             exit()
             exit()
+        if event.type==locals.KEYDOWN:
+            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_DOWN and setheading!='up':
+                setheading='down'
+                snake_head=down
+            if event.key==locals.K_UP and setheading!='down':
+                setheading='up'
+                snake_head=up
+
+    if setheading=='right':
+        x+=30
+    elif setheading=='left':
+        x-=30
+    elif setheading=='up':
+        y-=30
+    else:
+        y+=30
+    position.append((x,y))
+    position.pop(0)
     # 将背景图画上去
     # 将背景图画上去
     screen.blit(background, (0, 0))
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
     # 将贪吃蛇画上去
-    screen.blit(right, position[-1])
+    screen.blit(snake_head, position[-1])
     # 将贪吃蛇的身体画上去
     # 将贪吃蛇的身体画上去
     for i in range(len(position)-1):
     for i in range(len(position)-1):
         screen.blit(body,position[i])
         screen.blit(body,position[i])