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WEB前端响应式布局之BootStarp使用

2019-06-03 13:12
Bootstrap:


1. 概念: 一个前端开发的框架,Bootstrap,来自 Twitter,是目前很受欢迎的前端框架。Bootstrap 是基于 HTML、CSS、JavaScript 的,它简洁灵活,使得 Web 开发更加快捷。
    * 框架:一个半成品软件,开发人员可以在框架基础上,在进行开发,简化编码。
    * 好处:
        1. 定义了很多的css样式和js插件。我们开发人员直接可以使用这些样式和插件得到丰富的页面效果。
        2. 响应式布局。
            * 同一套页面可以兼容不同分辨率的设备。

2. 快速入门
  
    1. 下载Bootstrap
    2. 在项目中将这三个文件夹复制
    3. 创建html页面,引入必要的资源文件

3.演示案例
<!DOCTYPE html>
<html lang="zh-CN">
<head>
     <meta charset="utf-8">
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <!-- 上述3个meta标签*必须*放在最前面,任何其他内容都*必须*跟随其后! -->
     <title>Bootstrap HelloWorld</title>

     <!-- Bootstrap -->
     <link href="css/bootstrap.min.css" rel="stylesheet">
        <!-- jQuery (Bootstrap 的所有 JavaScript 插件都依赖 jQuery,所以必须放在前边) -->
     <script src="js/jquery-3.3.1.min.js"></script>
     <!-- 加载 Bootstrap 的所有 JavaScript 插件。你也可以根据需要只加载单个插件。 -->
     <script src="js/bootstrap.min.js"></script>
</head>
<body>
     <h1>你好,世界!</h1>
</body>
</html>
响应式布局
同一套页面可以兼容不同分辨率的设备。
* 实现:依赖于栅格系统:将一行平均分成12个格子,可以指定元素占几个格子
* 步骤:
    1. 定义容器。相当于之前的table、
        * 容器分类:
            1. container:两边留白
            2. container-fluid:每一种设备都是100%宽度
    2. 定义行。相当于之前的tr   样式:row
    3. 定义元素。指定该元素在不同的设备上,所占的格子数目。样式:col-设备代号-格子数目
        * 设备代号:
            1. xs:超小屏幕 手机 (<768px):col-xs-12
            2. sm:小屏幕 平板 (≥768px)
            3. md:中等屏幕 桌面显示器 (≥992px)
            4. lg:大屏幕 大桌面显示器 (≥1200px)

    * 注意:
        1. 一行中如果格子数目超过12,则超出部分自动换行。
        2. 栅格类属性可以向上兼容。栅格类适用于与屏幕宽度大于或等于分界点大小的设备。
        3. 如果真实设备宽度小于了设置栅格类属性的设备代码的最小值,会一个元素沾满一整行。

CSS样式和JS插件


1. 全局CSS样式:
    * 按钮:class="btn btn-default"
    * 图片:
        *  class="img-responsive":图片在任意尺寸都占100%
        *  图片形状
            *  <img src="..." alt="..." class="img-rounded">:方形
            *  <img src="..." alt="..." class="img-circle"> : 圆形
            *  <img src="..." alt="..." class="img-thumbnail"> :相框
    * 表格
        * table
        * table-bordered
        * table-hover
    * 表单
        * 给表单项添加:class="form-control"
2. 组件:
    * 导航条
    * 分页条
3. 插件:
    * 轮播图



演示案例

<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <!-- 上述3个meta标签*必须*放在最前面,任何其他内容都*必须*跟随其后! -->
    <title>Bootstrap HelloWorld</title>

    <!-- Bootstrap -->
    <link href="css/bootstrap.min.css" rel="stylesheet">
     <!-- jQuery (Bootstrap 的所有 JavaScript 插件都依赖 jQuery,所以必须放在前边) -->
    <script src="js/jquery-3.3.1.min.js"></script>
    <!-- 加载 Bootstrap 的所有 JavaScript 插件。你也可以根据需要只加载单个插件。 -->
    <script src="js/bootstrap.min.js"></script>
    <style>
        .paddtop{
            padding-top: 10px;
        }
        .search-btn{
            float: left;
            border:1px solid #ffc900;
            width: 90px;
            height: 35px;
            background-color:#ffc900 ;
            text-align: center;
            line-height: 35px;
            margin-top: 15px;
        }

        .search-input{
            float: left;
            border:2px solid #ffc900;
            width: 400px;
            height: 35px;
            padding-left: 5px;
            margin-top: 15px;
        }
        .jx{
            border-bottom: 2px solid #ffc900;
            padding: 5px;
        }
        .company{
            height: 40px;
            background-color: #ffc900;
            text-align: center;
            line-height:40px ;
            font-size: 8px;
        }
    </style>
</head>
<body>

   <!-- 1.页眉部分-->
   <header class="container-fluid">
       <div class="row">
           <img src="img/top_banner.jpg" class="img-responsive">
       </div>
       <div class="row paddtop">
           <div class="col-md-3">
               <img src="img/logo.jpg" class="img-responsive">
           </div>
           <div class="col-md-5">
               <input class="search-input" placeholder="请输入线路名称">
               <a class="search-btn" href="#">搜索</a>
           </div>
           <div class="col-md-4">
               <img src="img/hotel_tel.png" class="img-responsive">
           </div>

       </div>
       <!--导航栏-->
       <div class="row">
           <nav class="navbar navbar-default">
               <div class="container-fluid">
                   <!-- Brand and toggle get grouped for better mobile display -->
                   <div class="navbar-header">
                       <!-- 定义汉堡按钮 -->
                       <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="#">首页</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><a href="#">Link</a></li>
                           <li><a href="#">Link</a></li>
                           <li><a href="#">Link</a></li>
                           <li><a href="#">Link</a></li>

                       </ul>
                   </div><!-- /.navbar-collapse -->
               </div><!-- /.container-fluid -->
           </nav>

       </div>

       <!--轮播图-->
       <div class="row">
           <div id="carousel-example-generic" class="carousel slide" data-ride="carousel">
               <!-- Indicators -->
               <ol class="carousel-indicators">
                   <li data-target="#carousel-example-generic" data-slide-to="0" class="active"></li>
                   <li data-target="#carousel-example-generic" data-slide-to="1"></li>
                   <li data-target="#carousel-example-generic" data-slide-to="2"></li>
               </ol>

               <!-- Wrapper for slides -->
               <div class="carousel-inner" role="listbox">
                   <div class="item active">
                       <img src="img/banner_1.jpg" alt="...">
                   </div>
                   <div class="item">
                       <img src="img/banner_2.jpg" alt="...">
                   </div>
                   <div class="item">
                       <img src="img/banner_3.jpg" alt="...">
                   </div>

               </div>

               <!-- Controls -->
               <a class="left carousel-control" href="#carousel-example-generic" role="button" data-slide="prev">
                   <span class="glyphicon glyphicon-chevron-left" aria-hidden="true"></span>
                   <span class="sr-only">Previous</span>
               </a>
               <a class="right carousel-control" href="#carousel-example-generic" role="button" data-slide="next">
                   <span class="glyphicon glyphicon-chevron-right" aria-hidden="true"></span>
                   <span class="sr-only">Next</span>
               </a>
           </div>
    </div>

</header>
<!-- 2.主体部分-->
   <div class="container">
        <div class="row jx">
            <img src="img/icon_5.jpg">
            <span>黑马精选</span>
        </div>

       <div class="row paddtop">
           <div class="col-md-3">
                <div class="thumbnail">
                    <img src="img/jiangxuan_3.jpg" alt="">
                    <p>上海直飞三亚5天4晚自由行(春节预售+亲子/蜜月/休闲游首选+豪华酒店任选+接送机)</p>
                    <font color="red">¥ 699</font>
                </div>
           </div>
           <div class="col-md-3">
               <div class="thumbnail">
                   <img src="img/jiangxuan_3.jpg" alt="">
                   <p>上海直飞三亚5天4晚自由行(春节预售+亲子/蜜月/休闲游首选+豪华酒店任选+接送机)</p>
                   <font color="red">¥ 699</font>
               </div>

           </div>
           <div class="col-md-3">

               <div class="thumbnail">
                   <img src="img/jiangxuan_3.jpg" alt="">
                   <p>上海直飞三亚5天4晚自由行(春节预售+亲子/蜜月/休闲游首选+豪华酒店任选+接送机)</p>
                   <font color="red">¥ 699</font>
               </div>
           </div>
           <div class="col-md-3">

               <div class="thumbnail">
                   <img src="img/jiangxuan_3.jpg" alt="">
                   <p>上海直飞三亚5天4晚自由行(春节预售+亲子/蜜月/休闲游首选+豪华酒店任选+接送机)</p>
                   <font color="red">¥ 699</font>
               </div>
           </div>
           </div>
           <div class="row jx">
               <img src="img/icon_6.jpg">
               <span>国内游</span>
           </div>
           <div class="row paddtop">
               <div class="col-md-4">
                   <img src="img/guonei_1.jpg">
               </div>
               <div class="col-md-8">
                   <div class="row">
                       <div class="col-md-4">
                           <div class="thumbnail">
                               <img src="img/jiangxuan_3.jpg" alt="">
                               <p>上海直飞三亚5天4晚自由行(春节预售+亲子/蜜月/休闲游首选+豪华酒店任选+接送机)</p>
                               <font color="red">¥ 699</font>
                           </div>
                       </div>
                       <div class="col-md-4">
                           <div class="thumbnail">
                               <img src="img/jiangxuan_3.jpg" alt="">
                               <p>上海直飞三亚5天4晚自由行(春节预售+亲子/蜜月/休闲游首选+豪华酒店任选+接送机)</p>
                               <font color="red">¥ 699</font>
                           </div>

                       </div>
                       <div class="col-md-4">

                           <div class="thumbnail">
                               <img src="img/jiangxuan_3.jpg" alt="">
                               <p>上海直飞三亚5天4晚自由行(春节预售+亲子/蜜月/休闲游首选+豪华酒店任选+接送机)</p>
                               <font color="red">¥ 699</font>
                           </div>
                       </div>

                   </div>
                   <div class="row">
                       <div class="col-md-4">
                           <div class="thumbnail">
                               <img src="img/jiangxuan_3.jpg" alt="">
                               <p>上海直飞三亚5天4晚自由行(春节预售+亲子/蜜月/休闲游首选+豪华酒店任选+接送机)</p>
                               <font color="red">¥ 699</font>
                           </div>
                       </div>
                       <div class="col-md-4">
                           <div class="thumbnail">
                               <img src="img/jiangxuan_3.jpg" alt="">
                               <p>上海直飞三亚5天4晚自由行(春节预售+亲子/蜜月/休闲游首选+豪华酒店任选+接送机)</p>
                               <font color="red">¥ 699</font>
                           </div>

                       </div>
                       <div class="col-md-4">

                           <div class="thumbnail">
                               <img src="img/jiangxuan_3.jpg" alt="">
                               <p>上海直飞三亚5天4晚自由行(春节预售+亲子/蜜月/休闲游首选+豪华酒店任选+接送机)</p>
                               <font color="red">¥ 699</font>
                           </div>
                       </div>
                        </div>

           </div>

       </div>
   </div>
   <!-- 3.页脚部分-->
   <footer class="container-fluid">
       <div class="row">
           <img src="img/footer_service.png" class="img-responsive">
       </div>
       <div class="row company">
           CSDN博客杨校老师 版权所有Copyright 2017-2019, All Rights Reserved 鲁ICP备19007759号-1
       </div>

   </footer>
</body>
</html>
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