save project

snake.py

@@ -12,6 +12,11 @@ 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')
+setheading="right"
+snake_head=right
 FPSCLOCK=pygame.time.Clock()
 x,y=240,120
 position = [(180,90),(180,120),(210,120),(x,y)]
@@ -20,13 +25,33 @@ while True:
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             exit()
-    x+=30
+        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="dowm"
+                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]))
     # 将贪吃蛇的身体画上去
     for i in range(len(position)-1):
         screen.blit(body,position[i])