save project

snake.py

@@ -13,19 +13,46 @@ screen = pygame.display.set_mode((660, 480))
 x,y=240,120
 
 list=[(180, 90),(180, 120),(210, 120),(x,y)]
+setheading='right'
+
 # 背景
 background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
+left = pygame.image.load('left.png')
+down = pygame.image.load('down.png')
+up = pygame.image.load('up.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
 
+snack_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'
+                snack_head=right
+            if event.key==locals.K_LEFT and setheading!='right':
+                setheading='left'
+                snack_head=left
+            if event.key==locals.K_UP and setheading!='down':
+                setheading='up'
+                snack_head=up
+            if event.key==locals.K_DOWN and setheading!='up':
+                setheading='down'
+                snack_head=down
+    if setheading=='right':
         x+=30
+    elif setheading=='left':
+        x-=30
+    elif setheading=='up':
+        y-=30
+    else:
+        y+=30
+    
     list.append((x,y))
     list.pop(0)
 
@@ -33,7 +60,7 @@ while True:
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
 
-    screen.blit(right, list[-1])
+    screen.blit(snack_head, list[-1])
     # 将贪吃蛇的身体画上去
     for i in range(len(list)-1):
         screen.blit(body,list[i])