save project

snake.py

@@ -12,20 +12,46 @@ 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=200,120
 a=[(180, 90), (180, 120), (210, 120),(x, y)]
+setheading="right"
+snakeh=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_UP and setheading!="down":
+                setheading="up"
+                snakeh=up
+            if event.key==locals.K_DOWN and setheading!="up":
+                setheading="down"
+                snakeh=down
+            if event.key==locals.K_RIGHT and setheading!="left":
+                setheading="right"
+                snakeh=right
+            if event.key==locals.K_LEFT and setheading!="right":
+                setheading="left"
+                snakeh=left
+    if setheading == "right":
         x+=30
+    elif setheading == "left":
+        x-=30
+    elif setheading == "up":
+        y-=30
+    else:
+        y+=30
     a.append((x,y))
     a.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(snakeh, a[-1])
     # 将贪吃蛇的身体画上去
     for i in range(len(a)-1):
         screen.blit(body,a[i])