以下是头部导航的代码,我只简要的对个别常用属性进行解释

总效果如图所示:

代码如下:

<nav class="navbar navbar-default navbar-inverse navbar-fixed-top"> //navbar-inverse 设置背景 //navbar-fixed-top 设置头部固定在顶部,因此需要给body设置顶部padding,一般设置为padding-top:60px <div class="Container-fluid"> //container-fluid设置导航条内容是否有一定的内间距,如果class="container-fluid"则没有内间距,内容紧贴左侧 //如果设置class="container",则内容有一定的内间距,内容对称居中 <!-- Brand and toggle get grouped for better mobile display --> <div class="navbar-header"> <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false"> <span class="sr-only">Toggle navigation</span> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> //这里是响应式的写法,在小屏幕上回显示三杆,无需改动 <a class="navbar-brand" href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >某管理系统</a> </div> <!-- Collect the nav links, forms, and other content for toggling --> <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1"> <ul class="nav navbar-nav"> <li class="active"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >首页 <span class="sr-only">(current)</span></a></li> <li class="dropdown"> <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">功能 <span class="caret"></span></a> <ul class="dropdown-menu"> <li class="dropdown-header" >业务功能</li> <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >信息建立</a></li> <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >信息查询</a></li> <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >信息管理</a></li> <li role="separator" class="divider"></li> <li class="dropdown-header" >系统功能</li> <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >设置</a></li> <li role="separator" class="divider"></li> </ul> </li> <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >帮助</a></li> </ul> <form class="navbar-form navbar-left pull-right"> <div class="form-group"> <input type="text" class="form-control" placeholder="username..."> <input type="password" class="form-control" placeholder="password..."> </div> <button type="submit" class="btn btn-default">Login</button> </form> </div><!-- /.navbar-collapse --> </div><!-- /.container-fluid --></nav>