个回答

• Beckybei

  2016-06-29 16:17:08

  .navbar{

  width：100%；

  margin：0 atuo；

  }

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• qq_美工_3

  2016-03-31 14:46:38

  <nav class="navbar navbar-default">

    <div class="container-fluid">//container-fluid这个类是自适应，container这个类是默认宽度，居中，老师没讲全，导航条要在最外层包裹<nav>

      <!-- 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>

        <a class="navbar-brand" href="#">Brand</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="#">Link <span class="sr-only">(current)</span></a></li>

          <li><a href="#">Link</a></li>

          <li class="dropdown">

            <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>

            <ul class="dropdown-menu">

              <li><a href="#">Action</a></li>

              <li><a href="#">Another action</a></li>

              <li><a href="#">Something else here</a></li>

              <li role="separator" class="divider"></li>

              <li><a href="#">Separated link</a></li>

              <li role="separator" class="divider"></li>

              <li><a href="#">One more separated link</a></li>

            </ul>

          </li>

        </ul>

        <form class="navbar-form navbar-left" role="search">

          <div class="form-group">

            <input type="text" class="form-control" placeholder="Search">

          </div>

          <button type="submit" class="btn btn-default">Submit</button>

        </form>

        <ul class="nav navbar-nav navbar-right">

          <li><a href="#">Link</a></li>

          <li class="dropdown">

            <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>

            <ul class="dropdown-menu">

              <li><a href="#">Action</a></li>

              <li><a href="#">Another action</a></li>

              <li><a href="#">Something else here</a></li>

              <li role="separator" class="divider"></li>

              <li><a href="#">Separated link</a></li>

            </ul>

          </li>

        </ul>

      </div><!-- /.navbar-collapse -->

    </div><!-- /.container-fluid -->

  </nav>

  
  

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• echo_kinchao

  2015-11-24 15:53:07

  用position:fixed 试试

  0