save project

snake.py

@@ -10,21 +10,47 @@ screen = pygame.display.set_mode((660, 480))
 # 背景
 # 背景
 background = pygame.image.load('bg.png')
 background = pygame.image.load('bg.png')
 right = pygame.image.load('right.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')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
 body = pygame.image.load('body.png')
 long=[(210,120),(180,120),(180,90),(x,y)]
 long=[(210,120),(180,120),(180,90),(x,y)]
+setheading='right'
+snake_head=right
 while True:
 while True:
     for event in pygame.event.get():
     for event in pygame.event.get():
         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_DOWN and setheading!='up':
+                setheading='down'
+                snake_head=down        
+            elif event.key==locals.K_UP and setheading!='down':
+                setheading='up'
+                snake_head=up 
+            elif event.key==locals.K_LEFT and setheading!='right':
+                setheading='left'
+                snake_head=left      
+            else:
+                setheading='right'
+                snake_head=right           
+            
     # 将背景图画上去
     # 将背景图画上去
     screen.blit(background, (0, 0))
     screen.blit(background, (0, 0))
+    if setheading=='right':
         x+=30
         x+=30
+    if setheading=='left':
+        x-=30
+    if setheading=='up':
+        y-=30
+    if setheading=='down':
+        y+=30
     long.append((x,y))
     long.append((x,y))
     long.pop(0)
     long.pop(0)
     # 将贪吃蛇画上去
     # 将贪吃蛇画上去
-    screen.blit(right, long[-1])
+    screen.blit(snake_head, long[-1])
     # 将贪吃蛇的身体画上去
     # 将贪吃蛇的身体画上去
     # screen.blit(body, (210, 120))
     # screen.blit(body, (210, 120))
     # screen.blit(body, (180, 120))
     # screen.blit(body, (180, 120))