save project

snake.py

@@ -12,17 +12,43 @@ background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
+lelf =  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"
+snask_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()
-            x+=30
-    # 将背景图画上去
+        if event.type == locals.KEYDOWN:
+            if event.key ==locals.K_RIGHT and setheading !="left":
+                setheading ='right'
+                snask_head = right
+            if event.key ==locals.K_RIGHT and setheading !="right":
+                setheading ='left'
+                snask_head = left
+            if event.key ==locals.K_RIGHT and setheading !="down":
+                setheading ='up'
+                snask_head = up
+            if event.key ==locals.K_RIGHT and setheading !="up":
+                setheading ='down'
+                snask_head = down
+        if setheading =="right"
+           x +=30
+        elif setheading =="right"
+           x -=30
+        elif setheading =="right"
+           x -=30
+        elif setheading =="right"
+           x +=30   
+           
+
     screen.blit(background, (0, 0))
-    screen.blit(right,position[-1])
+    screen.blit(snask_head,position[-1])
     for i in range(len(position)-1):
         screen.blit(body,position[i])
     # 将贪吃蛇画上去