save project

snake.py

@@ -10,9 +10,14 @@ clock=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=330,120
+setheading='right'
+snake_head=right
 position=[(270,150),(270,120),(300,120),(330,120)]
 
 while True:
@@ -20,13 +25,33 @@ while True:
         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=x+30
+    elif setheading=='left':
+        x=x-30
+    elif setheading=='up':
+        y=y-30
+    else:
+        y=y+30     
     position.append((x,y))
     position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right, (x, y))
+    screen.blit(snake_head, (x, y))
     for i in range(len(position)-1):
         screen.blit(body,position[i])
     # 将果实画上去