save project

snake.py

@@ -10,23 +10,98 @@ F=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
 i=[(180,90),(180,120),(210,120),(x,y)]
+xxs='right'
+sb=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()
-    x+=30  
+        elif event.type == locals.KEYDOWN:
+            if event.key == locals.K_RIGHT and xxs != 'left':
+                xxs = 'right'
+                sb=right
+            if event.key == locals.K_LEFT and xxs != 'right':
+                xxs = 'left'
+                sb=left
+            if event.key == locals.K_UP and xxs != 'down':
+                xxs = 'up'
+                sb=up    
+            if event.key == locals.K_DOWN and xxs != 'up':
+                xxs = 'down'
+                sb=down  
+    if xxs=='right':
+        x +=30
+    elif xxs=='left':
+        x-=30    
+    if xxs=='up':
+        y -=30
+    elif xxs=='down':
+        y+=30    
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     i.append((x,y))    
     i.pop(0)
     # 将背景图画上去
 
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right, i[-1])
+    screen.blit(sb, i[-1])
     # 将贪吃蛇的身体画上去
     for b in range(len(i)-1):
         screen.blit(body,i[b])