save project

snake.py

@@ -10,6 +10,8 @@ background=pygame.image.load('bg.png')
 right=pygame.image.load('right.png')
 right=pygame.image.load('right.png')
 food=pygame.image.load('apple.png')
 food=pygame.image.load('apple.png')
 body=pygame.image.load('body.png')
 body=pygame.image.load('body.png')
+setheading='right'
+snake_head=right
 x,y=240,120
 x,y=240,120
 position=[(180,90),(180,120),(210,120),(x,y)]
 position=[(180,90),(180,120),(210,120),(x,y)]
 while True:
 while True:
@@ -17,13 +19,30 @@ while True:
         if event.type == locals.QUIT:
         if event.type == locals.QUIT:
             #接收到退出事件后退出程序
             #接收到退出事件后退出程序
             exit()
             exit()
+        if event.type==locals.KEYDOWN:
+            if event.key==locals.K_RIGHT and setheading != 'left':
+                setheading='right'
+            if event.key==locals.K_LEFT and setheading != 'right':
+                setheading='left'
+            if event.key==locals.K_UP and setheading != 'down':
+                setheading='up'
+            if event.key==locals.K_DOWN and setheading != 'up':
+                setheading='down'
+    #设置贪吃蛇的头部坐标
+    if setheading=='right':
         x+=30
         x+=30
+    elif setheading=='left':
+        x-=30
+    elif setheading=='up':
+        y-=30
+    else:
+        y+=30
     position.append((x,y))
     position.append((x,y))
     position.pop(0)
     position.pop(0)
     #将背景画上去
     #将背景画上去
     screen.blit(background,(0,0))
     screen.blit(background,(0,0))
     #将贪吃蛇画上去
     #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
     #将贪吃蛇的身体画上去
     for i in range(len(position)-1):
     for i in range(len(position)-1):
         screen.blit(body,position[i])
         screen.blit(body,position[i])