save project

snake.py

@@ -13,17 +13,48 @@ background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.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:
     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
+            if event.key==locals.k_LEFT and setheading !="right":
+                setheading="left"
+                snake_head=left
+            if event.key==locals.k_up and setheading !="down":
+                setheading="up"
+                snake_head=up
+            if event.key==locals.k_DOWN and setheading !="up":
+                setheading="down"
+                snake_head=down
+    
+    
+    if setheading=="right":
         x+=30
+    elif setheading=="left":    
+        x-=30
+    elif setheading=="up":
+        y-=30
+    else:
+        y+=30    
     # 将背景图画上去
     position.append((x,y))
     position.pop(0)
+    
     screen.blit(background, (0, 0)) 
     screen.blit(right,position[-1])
     # 将贪吃蛇画上去