save project

snake.py

@@ -13,9 +13,14 @@ 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:
@@ -24,12 +29,16 @@ while True:
         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 
@@ -39,19 +48,15 @@ while True:
          y -= 30
     else:
          y += 30
-    #position.append((x,y))       
-
-        
-
-           
+    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, position[-1])
     # 将贪吃蛇的身体画上去
-    screen.blit(body, (210, 120))
-    screen.blit(body, (180, 120))
-    screen.blit(body, (180, 90))
+    for i in range(len(position[-1])):
+        screen.blit(body, position[i])
     # 将果实画上去
     screen.blit(food, (360, 300))
     # 刷新画面