save project

snake.py

@@ -12,19 +12,51 @@ background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
+left=pygame.image.load('left.png')
+down=pygame.image.load('down.png')
+up=pygame.image.load('up.png')
 x,y=240,120
 b=[(180,90),(180,120),(210,120),(x,y)]
+
+s='right'
+snake_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 s !='left':
+                s='right'
+                snake_head=right
+            if event.key==locals.K_LEFT and s !='right':
+                s='left'
+                snake_head=left
+            if event.key==locals.K_UP and s !='down':
+                s='up'
+                snake_head=up
+            if event.key==locals.K_DOWN and s !='up':
+                s='down'
+                snake_head=down
+    if s=='right':
+        x+=30
+    elif s=='left':
+        x-=30
+    elif s=='up':
+        y-=30
+    else:
+
+        y+=30
+
+
+    
+    b.append((x,y))
+    b.pop(0)
    
-    screen.blit(background,(0,0))
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right, b[-1])
+    screen.blit(snake_head, b[-1])
     # 将贪吃蛇的身体画上去
     for i in range(len(b)-1):
         screen.blit(body,b[i])
@@ -33,9 +65,9 @@ while True:
     # screen.blit(body, (180, 90))
     # 将果实画上去
     screen.blit(food, (360, 300))
-    x+=30
-    b.append((x,y))
-    b.pop(0)# 刷新画面
+    
+    
+    # 刷新画面
     pygame.display.update()
     a.tick(3)
     
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