1.什么是Bootstrap框架?
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。
Bootstrap提供了优雅的HTML和CSS规范，它即是由动态CSS语言Less写成。
2.学习网站
- 官方中文文档: https://v3.bootcss.com/
- 菜鸟教程案例: http://www.runoob.com/bootstrap/bootstrap-tutorial.html
3.新闻网站注册登陆界面
最终样式：
1)实现登陆界面
首先下载bootstrap包，我下的是bootstrap3.3.7
链接: https://pan.baidu.com/s/1BkBea0hzX_6m1vWQahg70A 提取码: thc5
解压后自动形成三个目录，我们可以直接导入这些样式使用
登陆界面：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<!--倒入本地的BOotstrap样式, 也可以倒入网络上的；-->
<link href="css/bootstrap.css" rel="stylesheet">
<style>
.navbar{
font-size: 130%;
background: whitesmoke;
margin-top: 10px;
padding-top: 5px;
box-shadow: 2px 2px 2px 2px lightgray;
height: 60px;
}
</style>
</head>
<body>
<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="#">Todo</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="#">主页 <span class="sr-only">(current)</span></a></li>
<li><a href="#">监控</a></li>
<li><a href="#">新闻</a></li>
<li><a href="#">音乐</a></li>
<li><a href="#">电影</a></li>
</ul>
</div><!-- /.navbar-collapse -->
</div><!-- /.container-fluid -->
</nav>
<!--<button type="button" class="btn btn-danger">失败</button>-->
<!--实现登录界面-->
<div class="container">
<div class="col-lg-4 col-lg-offset-4" style="margin-top: 50px">
<h1>
登录
<small>
没有账号？
<a href="#">注册</a>
</small>
</h1>
<form>
<div class="form-group">
<label for="exampleInputEmail1">用户名</label>
<input type="email" class="form-control" id="exampleInputEmail1" placeholder="Email">
</div>
<div class="form-group">
<label for="exampleInputPassword1">密码</label>
<input type="password" class="form-control" id="exampleInputPassword1" placeholder="Password">
</div>
<div class="checkbox">
<label>
<input type="checkbox"> 记住密码
</label>
</div>
<button type="submit" class="btn btn-success btn-block">登录</button>
</form>
</div>
<!--导入外部的js样式;-->
<!--<script href="js/bootstrap.js"></script>-->
<!--<script href="js/npm.js"></script>-->
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.min.js"></script>
<!--导入jQuery-->
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/jquery.min.js">
</script>
</div>
</body>
</html>
2)实现注册界面
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<!--倒入本地的BOotstrap样式, 也可以倒入网络上的；-->
<link href="css/bootstrap.css" rel="stylesheet">
<style>
.navbar{
font-size: 130%;
background: whitesmoke;
margin-top: 10px;
padding-top: 5px;
box-shadow: 2px 2px 2px 2px lightgray;
height: 60px;
}
</style>
</head>
<body>
<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="#">Todo</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="#">主页 <span class="sr-only">(current)</span></a></li>
<li><a href="#">监控</a></li>
<li><a href="#">新闻</a></li>
<li><a href="#">音乐</a></li>
<li><a href="#">电影</a></li>
</ul>
</div><!-- /.navbar-collapse -->
</div><!-- /.container-fluid -->
</nav>
<!--<button type="button" class="btn btn-danger">失败</button>-->
<!--实现登录界面-->
<div class="container">
<div class="col-lg-4 col-lg-offset-4" style="margin-top: 50px">
<h1>
注册
<small>
已有帐号
<a href="#">登录</a>
</small>
</h1>
<form>
<div class="form-group">
<label for="exampleInputEmail1">用户名</label>
<input type="email" class="form-control" id="exampleInputEmail1" placeholder="Email">
</div>
<div class="form-group">
<label for="exampleInputPassword1">密码</label>
<input type="password" class="form-control" id="exampleInputPassword1" placeholder="Password">
</div>
<div class="checkbox">
<label>
<input type="checkbox"> 记住密码
</label>
</div>
<button type="submit" class="btn btn-success btn-block">注册</button>
</form>
</div>
<!--导入外部的js样式;-->
<!--<script href="js/bootstrap.js"></script>-->
<!--<script href="js/npm.js"></script>-->
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.min.js"></script>
<!--导入jQuery-->
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/jquery.min.js">
</script>
</div>
</body>
</html>
