Bootstrap
一、简介
Bootstrap是美国Twitter公司的设计师Mark Otto和Jacob Thornton合作基于HTML、CSS、JavaScript 开发的简洁、直观、强悍的前端开发框架，使得 Web 开发更加快捷。
二、安装
1、本地链接
官网下载
2、CDN
<!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<!-- 可选的 Bootstrap 主题文件（一般不用引入） -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous">
<!-- 最新的 Bootstrap 核心 JavaScript 文件 -->
<script src="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
三、布局容器
- 固定宽度：.container
- 流式布局：.container-fluid
代码示例:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>布局容器</title>
<link rel="stylesheet" type="text/css" href="bootstrap-3.3.7-dist/css/bootstrap.css">
<style type="text/css">
.container-fluid {
padding: 0;
}
</style>
</head>
<body>
<!-- 固定宽度容器: 固定值 -->
<div class="container">
<h1 class="bg-warning">固定宽度容器</h1>
</div>
<!-- 流式布局容器: 百分比 -->
<div class="container-fluid">
<h1 class="bg-warning">流式布局容器</h1>
</div>
</body>
<script src="bootstrap-3.3.7-dist/js/jquery-3.3.1.min.js"></script>
<script src="bootstrap-3.3.7-dist/js/bootstrap.js"></script>
<script type="text/javascript">
</script>
</html>
四、响应式布局
- 超小屏幕：小于 768px
- 小屏幕：大于等于 768px
- 中等屏幕：大于等于 992px
- 大屏幕：大于等于 1200px
代码示例:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>响应式</title>
<!-- 适配手机屏幕 -->
<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<link rel="stylesheet" type="text/css" href="bootstrap-3.3.7-dist/css/bootstrap.css">
</head>
<body>
<!-- 在不同屏幕尺寸下,bs已经做好的整体的响应式布局 -->
<div class="container">
<nav class="navbar navbar-default navbar-inverse">
<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>
</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>
<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>
</div>
</body>
<script src="bootstrap-3.3.7-dist/js/jquery-3.3.1.min.js"></script>
<script src="bootstrap-3.3.7-dist/js/bootstrap.js"></script>
</html>
五、删格系统
1、概念
将父级可用宽度(content)均分为12等份
2、列比
- 超小屏幕：.col-xs-*
- 小屏幕：.col-sm-*
- 中等屏幕：.col-md-*
- 大屏幕：.col-lg-*
v-hint：只设置小屏列比会影响大屏列比；只设置大屏列比小屏时会撑满屏幕
3、行
<div class="row"></div>
...
<div class="row"></div>
4、列偏移
- 超小屏幕：.col-xs-offset-*
- 小屏幕：.col-sm-offset-*
- 中等屏幕：.col-md-offset-*
- 大屏幕：.col-lg-offset-*
六、辅助类
1、 情境背景色
<!-- 背景颜色 -->
<p class="bg-primary">...</p>
<p class="bg-success">...</p>
<p class="bg-info">...</p>
<p class="bg-warning">...</p>
<p class="bg-danger">...</p>
2、快速浮动
<!-- 带有!important -->
<div class="pull-left">...</div>
<div class="pull-right">...</div>
3、快速清浮动
<div class="clearfix">...</div>
4、显隐
<div class="show">显示</div>
<div class="hidden">隐藏</div>
七、字体图标
<i class="glyphicon glyphicon-*"></i>
八、组件
bootstrap中文网
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