Bootstrap组件1

导航条

默认样式的导航条

导航条是在您的应用或网站中作为导航页头的响应式基础组件。它们在移动设备上可以折叠（并且可开可关），且在视口（viewport）宽度增加时逐渐变为水平展开模式。

两端对齐的导航条导航链接已经被弃用了。

<nav class="navbar navbar-default">
  <div class="container-fluid">
    <!-- 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">
        <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>

反色的导航条

通过添加 .navbar-inverse 类可以改变导航条的外观。

<nav class="navbar navbar-inverse">
  ...
</nav>

分页

为您的网站或应用提供带有展示页码的分页组件，或者可以使用简单的翻页组件。

默认分页

受 Rdio 的启发，我们提供了这个简单的分页组件，用在应用或搜索结果中超级棒。组件中的每个部分都很大，优点是容易点击、易缩放、点击区域大。

<nav aria-label="Page navigation">
  <ul class="pagination">
    <li>
      <a href="#" aria-label="Previous">
        <span aria-hidden="true">&laquo;</span>
      </a>
    </li>
    <li><a href="#">1</a></li>
    <li><a href="#">2</a></li>
    <li><a href="#">3</a></li>
    <li><a href="#">4</a></li>
    <li><a href="#">5</a></li>
    <li>
      <a href="#" aria-label="Next">
        <span aria-hidden="true">&raquo;</span>
      </a>
    </li>
  </ul>
</nav>

禁用和激活状态

链接在不同情况下可以定制。你可以给不能点击的链接添加 .disabled 类、给当前页添加 .active 类。

<nav aria-label="...">
  <ul class="pagination">
    <li class="disabled"><a href="#" aria-label="Previous"><span aria-hidden="true">&laquo;</span></a></li>
    <li class="active"><a href="#">1 <span class="sr-only">(current)</span></a></li>
    ...
  </ul>
</nav>

我们建议将 active 或 disabled 状态的链接（即 <a> 标签）替换为 <span> 标签，或者在向前/向后的箭头处省略<a> 标签，这样就可以让其保持需要的样式而不能被点击。

<nav aria-label="...">
  <ul class="pagination">
    <li class="disabled">
      <span>
        <span aria-hidden="true">&laquo;</span>
      </span>
    </li>
    <li class="active">
      <span>1 <span class="sr-only">(current)</span></span>
    </li>
    ...
  </ul>
</nav>

巨幕

这是一个轻量、灵活的组件，它能延伸至整个浏览器视口来展示网站上的关键内容。(快速搭建一个小页面)

<div class="jumbotron">
  <h1>Hello, world!</h1>
  <p>...</p>
  <p><a class="btn btn-primary btn-lg" href="#" role="button">Learn more</a></p>
</div>

如果需要让巨幕组件的宽度与浏览器宽度一致并且没有圆角，请把此组件放在所有 .container 元素的外面，并在组件内部添加一个 .container 元素。

<div class="jumbotron">
  <div class="container">
    ...
  </div>
</div>

页头

页头组件能够为 h1 标签增加适当的空间，并且与页面的其他部分形成一定的分隔。它支持 h1 标签内内嵌 small 元素的默认效果，还支持大部分其他组件（需要增加一些额外的样式）。

<div class="page-header">
  <h1>Example page header <small>Subtext for header</small></h1>
</div>

缩略图

通过缩略图组件扩展 Bootstrap 的 栅格系统，可以很容易地以网格的方式展示图像、视频、文本等内容。

默认样式的实例

Boostrap 缩略图的默认设计仅需最少的标签就能展示带链接的图片。

<div class="row">
  <div class="col-xs-6 col-md-3">
    <a href="#" class="thumbnail">
      <img src="..." alt="...">
    </a>
  </div>
  ...
</div>

自定义内容

添加一点点额外的标签，就可以把任何类型的 HTML 内容，例如标题、段落或按钮，加入缩略图组件内。

<div class="row">
  <div class="col-sm-6 col-md-4">
    <div class="thumbnail">
      <img src="..." alt="...">
      <div class="caption">
        <h3>Thumbnail label</h3>
        <p>...</p>
        <p><a href="#" class="btn btn-primary" role="button">Button</a> <a href="#" class="btn btn-default" role="button">Button</a></p>
      </div>
    </div>
  </div>
</div>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
    <link rel="stylesheet" href="bootstrap-3.4.1-dist/css/bootstrap.min.css">
    <link rel="stylesheet" href="font-awesome-4.7.0/css/font-awesome.min.css">
    <script src="../js/jquery-3.3.1.min.js"></script>
    <script src="bootstrap-3.4.1-dist/js/bootstrap.min.js"></script>
</head>
<body>

<div class="container">
    <div class="row">
        <!--导航条-->
        <nav class="navbar navbar-inverse">
        <!--navbar-inverse黑色-->
        <!--navbar-default白色-->
  <div class="container-fluid">
    <!-- 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="#">图书管理系统</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="#">书籍 <span class="sr-only">(current)</span></a></li>
        <li><a href="#">作者</a></li>
        <li class="dropdown">
          <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">更多查询 <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">
        <div class="form-group">
          <input type="text" class="form-control" placeholder="请输入">
        </div>
        <button type="submit" class="btn btn-default">搜索</button>
      </form>
      <ul class="nav navbar-nav navbar-right">
        <li><a href="#">admin</a></li>
        <li class="dropdown">
          <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">更多操作 <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>
    </div>
</div>

<div class="container">
    <!--页头-->
    <div class="page-header">
        <h1>亚洲最大的线上图书馆开业了<small>快来体验哦</small></h1>
    </div>
    <div class="row">
        <!--巨幕-->
        <div class="jumbotron">
            <h1>Hello, world!</h1>
            <p>...</p>
            <p><a class="btn btn-primary btn-lg" href="#" role="button">Learn more</a></p>
        </div>
    </div>
    <div class="row">
        <!--默认样式缩略图-->
        <div class="col-xs-6 col-md-3">
            <a href="#" class="thumbnail">
                <img src="1.png" alt="...">
            </a>
        </div>
        <div class="col-xs-6 col-md-3">
            <a href="#" class="thumbnail">
                <img src="1.png" alt="...">
            </a>
        </div>
        <div class="col-xs-6 col-md-3">
            <a href="#" class="thumbnail">
                <img src="1.png" alt="...">
            </a>
        </div>
        <div class="col-xs-6 col-md-3">
            <a href="#" class="thumbnail">
                <img src="1.png" alt="...">
            </a>
        </div>
    </div>
    <div class="row">
        <!--默认样式缩略图-->
        <div class="col-xs-6 col-md-3">
            <a href="#" class="thumbnail">
                <img src="1.png" alt="...">
            </a>
        </div>
        <div class="col-xs-6 col-md-3">
            <a href="#" class="thumbnail">
                <img src="1.png" alt="...">
            </a>
        </div>
        <div class="col-xs-6 col-md-3">
            <a href="#" class="thumbnail">
                <img src="1.png" alt="...">
            </a>
        </div>
        <div class="col-xs-6 col-md-3">
            <a href="#" class="thumbnail">
                <img src="1.png" alt="...">
            </a>
        </div>
    </div>
    <div class="row">
        <!--自定义缩略图-->
        <div class="col-sm-6 col-md-4">
            <div class="thumbnail">
                <img src="1.png" alt="...">
                <div class="caption">
                    <h3>鼬第一个分身</h3>
                    <p>分身简介</p>
                    <p><a href="#" class="btn btn-primary" role="button">按钮一</a> <a href="#" class="btn btn-default" role="button">按钮二</a></p>
                </div>
            </div>
        </div>
        <div class="col-sm-6 col-md-4">
            <div class="thumbnail">
                <img src="1.png" alt="...">
                <div class="caption">
                    <h3>鼬第二个分身</h3>
                    <p>分身简介</p>
                    <p><a href="#" class="btn btn-primary" role="button">按钮一</a> <a href="#" class="btn btn-default" role="button">按钮二</a></p>
                </div>
            </div>
        </div>
        <div class="col-sm-6 col-md-4">
            <div class="thumbnail">
                <img src="1.png" alt="...">
                <div class="caption">
                    <h3>鼬第三个分身</h3>
                    <p>分身简介</p>
                    <p><a href="#" class="btn btn-primary" role="button">按钮一</a> <a href="#" class="btn btn-default" role="button">按钮二</a></p>
                </div>
            </div>
        </div>
    </div>
</div>

</body>
</html>