我在bootstrap 3中有一个或多或少的标准导航
<body data-spy="scroll" data-target=".navbar-collapse">
<!-- ---------- Navigation ---------- -->
<div class="navbar navbar-fixed-top" role="navigation">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
<span class="sr-only">Toggle navigation</span>
</button>
<a class="navbar-brand" href="index.html"> <img src="#"></a>
</div>
<div class="navbar-collapse collapse">
<ul class="nav navbar-nav navbar-right">
<li class="active"><a href="#home">Home</a></li>
<li><a href="#one">One</a></li>
<li><a href="#two">Two</a></li>
<li><a href="#three">Three</a></li>
<li><a href="#four">Four</a></li>
</ul>
</div>
</div>
</div>
它在较小的设备上通常会折叠.单击菜单按钮将展开菜单，但如果我单击(或touch )菜单链接，菜单将保持打开状态.我要怎么做，才能再次关闭它？