save project

snake.py

@@ -10,28 +10,52 @@ 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')
+up=pygame.image.load('up.png')
+down=pygame.image.load('down.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
+f='right'
+snakeHead = right
 y=120
 x=240
 
 jk=pygame.time.Clock();
 a=[(180,90),(180,120),(210,120),(x,y)]
-
 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_RIGHT and f!='left':
+                f='right'
+                snakeHead=right
+            if event.key==locals.K_LEFT and f!='right':
+                f='left'
+                snakeHead=left
+            if event.key==locals.K_UP and f!='down':
+                f='up'
+                snakeHead=up
+            if event.key==locals.K_DOWN and f!='up':
+                f='down'
+                snakeHead=down 
+    if f=='right':
+        x+=30
+    elif f=='left':
+        x-=30
+    elif f=='up':
+        y-=30
+    else :
+        y+=30
 
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上
     
-    x+=30
     a.append((x,y))
     a.pop(0)
-    screen.blit(right, (a[-1] ))
+    screen.blit(snakeHead, (a[-1] ))
     # 将贪吃蛇的身体画上去
     for i in range(len(a)-1):
         screen.blit(body,a[i])