save project

snake.py

+
 import pygame
 from pygame import locals
 
@@ -11,22 +12,49 @@ x,y=240,120
 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('body.png')
+up = pygame.image.load('body.png')
+down = pygame.image.load('body.png')
 FPSCLOCK=pygame.time.Clock()
 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()
+        elif event.type==locals.KEYDOWN:
+            if event.key == locals.K_DOWN and setheading != "up":
+                setheading = 'down'
+                snake_head = down
+            if event.key == locals.K_UP and setheading != "down":
+                setheading = 'up'
+                snake_head = down
+            if event.key == locals.K_LEFT and setheading != "right":
+                setheading = 'left'
+                snake_head = down
+            if event.key == locals.K_RIGHT and setheading != "left":
+                setheading = 'right'
+                snake_head = down
+    if setheading == "right":
         x+=30
+    elif setheading == "left":
+        x-=30
+    elif setheading == "up":
+        y-=30
+    else:
+        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, position[-1])
+    screen.blit(snake_head, position[-1])
     for i in range(len(position)-1):
-        screen.blit(body,position[i])# 将贪吃蛇的身体画上去
+        screen.blit(body,position[i])
         
     # 将果实画上去
     screen.blit(food, (360, 300))