save project

snake.py

@@ -11,22 +11,47 @@ FPSCLOCK=pygame.time.Clock()
 # 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')
 x,y=240,120
 position=[(180,90),(180,120),(210,120),(x,y)]
+setheading="right"
+snake_head=right
 while True:
+    if setheading=="right":
         x+=30
+    if setheading=="left":
+        x-=30
+    if setheading=="up":
+        y-=30
+    if setheading=="down":
+        y+=30
     position.append((x,y))
     position.pop(0)
     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 setheading!="left":
+                setheading="right"
+                snake_head=right
+            elif event.key==locals.K_LEFT and setheading!="right":
+                setheading="left"
+                snake_head=left
+            elif event.key==locals.K_UP and setheading!="down":
+                setheading="up"
+                snake_head=up
+            elif event.key==locals.K_DOWN and setheading!="up":
+                setheading="down"
+                snake_head=down    
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right,position[3] )
+    screen.blit(snake_head,position[3] )
     # 将贪吃蛇的身体画上去
     for i in range(len(position)-1):
         screen.blit(body,position[i])