为什么缩小后只剩navbar-header这个了？右边的都没了
缩小后
<nav class="navbar navbar-default" role="navigation">
<div class="navbar-header">
<a class="navbar-brand" href="#">W3Cschool</a>
</div>
<div class="collapse navbar-collapse" id="example-navbar-collapse">
<ul class="nav navbar-nav">
<li class="active"><a href="#">iOS</a></li>
<li><a href="#">SVN</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">
Java <b class="caret"></b>
</a>
<ul class="dropdown-menu">
<li><a href="#">jmeter</a></li>
<li><a href="#">EJB</a></li>
<li><a href="#">Jasper Report</a></li>
<li class="divider"></li>
<li><a href="#">分离的链接</a></li>
<li class="divider"></li>
<li><a href="#">另一个分离的链接</a></li>
</ul>
</li>
<li><a href="#">AAAA</a></li>
</ul>
<div class="navbar-form navbar-right">
<a href="#" class="navbar-link">登陆</a>
<a href="#" class="navbar-link">注册</a>
</div>
</div>
</nav>这个页面应该是bootstrap的自适应
代码简化了一下 还是不行
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Bootstrap 实例 - 默认的导航栏</title>
<link href="bootstrap.css" rel="stylesheet">
<script src="jquery.min.js"></script>
<script src="bootstrap.js"></script>
</head>
<body>
<nav class="navbar navbar-default" role="navigation">
<div class="navbar-header">
<a class="navbar-brand" href="#">W3Cschool</a>
</div>
<div class="collapse navbar-collapse" id="example-navbar-collapse">
<ul class="nav navbar-nav">
<li class="active"><a href="#">iOS</a></li>
<li><a href="#">SVN</a></li>
<li><a href="#">AAAA</a></li>
</ul>
<div class="navbar-form navbar-right">
<a href="#" class="navbar-link">登陆</a>
<a href="#" class="navbar-link">注册</a>
</div>
</div>
</nav>
</body>
</html>官方文档有说明，响应式导航栏会依赖于collapse插件，定制Bootstrap的时候需要包含进去