save project

snake.py

@@ -12,22 +12,47 @@ background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
+down = pygame.image.load('down.png')
+up = pygame.image.load('up.png')
+left = pygame.image.load('left.png')
 x,y=240,120
 SB=pygame.time.Clock()
 SB1=[(180,90),(180,210),(210,120),(x,y)]
+setheading="right"
+sb=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()
+        if event.type==locals.KEYDOWN:
+            if event.key==locals.K_RIGHT and setheading !="left":
+                setheading="right"
+                sb=right
+            if event.key==locals.K_LEFT and setheading !="right":
+                setheading="left"
+                sb=left
+            if event.key==locals.K_UP and setheading !="down":
+                setheading="up"
+                sb=up
+            if event.key==locals.K_DOWN and setheading !="up" :
+                setheading="down"
+                sb=down
+    if setheading=="right":
         x+=30
+    elif setheading=="left":
+        x-=30
+    elif setheading=="up":
+        y-=30
+    else :
+        y+=30
     SB1.append((x,y))
     SB1.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(sb, (x, y))
     # 将贪吃蛇的身体画上去
     for i in range(len(SB1)-1):
         screen.blit(body,SB1[i])