前端框架Bootstrap简介

该框架已经帮你写好了很多页面样式，你如果需要使用，只需要下载它对应文件，之后直接cv拷贝即可；

宗旨：在使用Bootstrap的时候所有的页面样式都只需要你通过class来调节即可；

什么是响应式布局？比如浏览器窗口大小的调节，各标签需自适应调节大小，以至于整体布局不会丑陋无比；

版本选择建议使用v3(最好不要用最新的)版本(用于生产环境的 Bootstrap)：https://v3.bootcss.com/

不下载还可以直接在script中引用cdn链接，如：
<link href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/3.4.1/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.js"></script>
建议前期下载使用，因为这样pycharm会有语法提示

bootstrap解压后，会有css和fonts及js三个目录，css目录可只留一个bootstrap.min.css文件；fonts目录有几个文件留几个文件，一个都
不要删除；js目录可只留一个bootstrap.min.js文件；

注意：bootstrap的js代码是依赖于jQuery的，也就意味着你在使用bootstrap动态效果的时候，一定要先导入jQuery；

CV大法：打开开发者工具，找到其对应html，对其html右键copy/copy outerhtml

举例：Bootstrap官网的实例精选，找到其轮播图，打开开发者工具查看其html，然后进行复制粘贴操作，这样轮播图的功能就已经完成了；

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <meta name="viewport" content="width=device-width, initial-scale=1 user-scalable=no">
    <link rel="stylesheet" href="bootstrap-3.4.1-dist/css/bootstrap.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">
            <div class="col-md-8 col-md-offset-2">
                <div id="carousel-example-generic" class="carousel slide" data-ride="carousel">
                    <ol class="carousel-indicators">
                        <li data-target="#carousel-example-generic" data-slide-to="0" class=""></li>
                        <li data-target="#carousel-example-generic" data-slide-to="1" class="active"></li>
                        <li data-target="#carousel-example-generic" data-slide-to="2" class=""></li>
                    </ol>
                    <div class="carousel-inner" role="listbox">
                        <div class="item">
                            <img data-src="holder.js/1140x500/auto/#777:#555/text:First slide" alt="First slide [1140x500]" src="data:image/svg+xml;base64,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" data-holder-rendered="true">
                        </div>
                        <div class="item active">
                            <img data-src="holder.js/1140x500/auto/#666:#444/text:Second slide" alt="Second slide [1140x500]" src="data:image/svg+xml;base64,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" data-holder-rendered="true">
                        </div>
                        <div class="item">
                            <img data-src="holder.js/1140x500/auto/#555:#333/text:Third slide" alt="Third slide [1140x500]" src="data:image/svg+xml;base64,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" data-holder-rendered="true">
                        </div>
                    </div>
                    <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>
        </div>
    </div>
</body>
</html>

while True: print('studying...')