save project

snake.py

@@ -10,23 +10,51 @@ clock=pygame.time.Clock()
 # 背景
 background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
+left = pygame.image.load('left.png')
+up = pygame.image.load('up.png')
+down = pygame.image.load('down.png')
+
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
 
 x,y=240,120
 xy=[(180,90),(180,120),(210,120),(x,y)]
+setheading='right'
+set_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()
+        if event.type==locals.KEYDOWN:
+            if event.key==locals.K_RIGHT and setheading !='left':
+                setheading='right'
+                set_head=right
+            if event.key==locals.K_LEFT and setheading !='right':
+                setheading='left'
+                set_head=left
+            if event.key==locals.K_UP and setheading !='down':
+                setheading='up'
+                set_head=up
+            if event.key==locals.K_DOWN and setheading !='up':
+                setheading='down'
+                set_head=down
+
+    if setheading=='right':
         x+=30
+    elif setheading=='left':
+        x-=30
+    elif setheading=='up':
+        y-=30
+    else:
+        y+=30
+
     xy.append((x,y))
     xy.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(set_head, xy[-1])
     # 将贪吃蛇的身体画上去
     for i in range(len(xy)-1):
         screen.blit(body,xy[i])