<body style="padding-top:50px">
<!--
navbar 导航条的基础样式
nav navbar-nav 导航条里菜单的固定样式组合class
navbar-default 导航条的默认样式
navbar-static-top 导航条为直角
navbar-fixed-top 导航条固定在上面,一般这时候要给body设置padding值或margin
navbar-fixed-bottom 导航条固定在下面
-->
<div class="container">
<!-- 默认样式的导航条 -->
<nav class="navbar navbar-default">
<ul class="nav navbar-nav">
<li class="active"><a href="#">W3School</a></li>
<li><a href="#">雪碧</a></li>
<li><a href="#">果汁</a></li>
</ul>
</nav> <!-- 黑色的导航条 -->
<nav class="navbar navbar-inverse">
<ul class="nav navbar-nav">
<li class="active"><a href="#">W3School</a></li>
<li><a href="#">雪碧</a></li>
<li><a href="#">果汁</a></li>
</ul>
</nav> <!-- 直角的导航条 -->
<nav class="navbar navbar-inverse navbar-static-top">
<ul class="nav navbar-nav">
<li class="active"><a href="#">W3School</a></li>
<li><a href="#">雪碧</a></li>
<li><a href="#">果汁</a></li>
</ul>
</nav> <!-- 固定在下面/上面的导航条 -->
<nav class="navbar navbar-inverse navbar-fixed-top">
<ul class="nav navbar-nav">
<li class="active"><a href="#">W3School</a></li>
<li><a href="#">雪碧</a></li>
<li><a href="#">果汁</a></li>
</ul>
</nav>
</div>
<script type="text/javascript" src="jquery/jquery.min.js"></script>
<script type="text/javascript" src="bootstrap/bootstrap.min.js"></script>
</body>
效果：
导航条的其他样式：
<!--
navbar-header 导航的头部，一般情况下放logo
navbar-brand 用来放logo的，需要配合navbar-header
--> <!-- 一般情况下都会把nav包在container外面 -->
<nav class="navbar navbar-default">
<div class="container">
<div class="navbar-header">
<a href="#" class="navbar-brand">
<img src="user_photo.png" height="20"/>
</a>
</div> <ul class="nav navbar-nav">
<li class="active"><a href="#">W3School</a></li>
<li><a href="#">雪碧</a></li>
<li><a href="#">果汁</a></li>
</ul>
</div>
</nav> <!-- 对齐方式的导航条 -->
<nav class="navbar navbar-default">
<div class="container">
<div class="navbar-header">
<a href="#" class="navbar-brand">logo</a>
</div> <!-- navbar-left表示内容以左边对齐 -->
<ul class="nav navbar-nav navbar-left">
<li class="active"><a href="#">W3School</a></li>
<li><a href="#">雪碧</a></li>
<li><a href="#">果汁</a></li>
</ul> <!-- navbar-right表示内容以右边对齐 -->
<ul class="nav navbar-nav navbar-right">
<li><a href="#">登陆</a></li>
<li><a href="#">注册</a></li>
</ul>
</div>
</nav> <!-- 有链接与文字的导航条 -->
<nav class="navbar navbar-default">
<div class="container">
<div class="navbar-header">
<a href="#" class="navbar-brand">logo</a>
</div> <!-- navbar-left表示内容以左边对齐 -->
<ul class="nav navbar-nav navbar-left">
<li class="active"><a href="#">W3School</a></li>
<li><a href="#">雪碧</a></li>
<li><a href="#">果汁</a></li>
</ul> <a href="#" class="navbar-link navbar-text">链接</a>
<p class="navbar-text">这里是一段文字</p> <!-- navbar-right表示内容以右边对齐 -->
<ul class="nav navbar-nav navbar-right">
<li><a href="#">登陆</a></li>
<li><a href="#">注册</a></li>
</ul>
</div>
</nav> <!-- 有表单的导航条 -->
<nav class="navbar navbar-default">
<div class="container">
<div class="navbar-header">
<a href="#" class="navbar-brand">logo</a>
</div> <!-- navbar-left表示内容以左边对齐 -->
<ul class="nav navbar-nav navbar-left">
<li class="active"><a href="#">W3School</a></li>
<li><a href="#">雪碧</a></li>
<li><a href="#">果汁</a></li>
</ul> <button class="btn btn-success navbar-btn">搜索</button> <!-- 如果导航里有form，需要给form添加navbar-form,如果让他们在一行显示添加navbar-left -->
<form action="aaa.html" class="navbar-form navbar-left">
<input type="text" class="form-control"/>
<button class="btn btn-default">搜索</button>
</form>
<!-- navbar-right表示内容以右边对齐 -->
<ul class="nav navbar-nav navbar-right">
<li><a href="#">登陆</a></li>
<li><a href="#">注册</a></li>
</ul>
</div>
</nav>
效果：