图标地址
http://fontawesome.io/icons/
图标用法地址
http://fontawesome.io/examples/
实现代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Title</title>
<link rel="stylesheet" href="Font-Awesome-master/css/font-awesome.min.css">
//这句是引入图标
<link rel="stylesheet" href="../day%2058%20bootstrip/bootstrap-3.3.7-dist/css/bootstrap.min.css">
//这句是引入bootstrap的写法
</head>
<body>
//通过这两句实现了带删除图标的按键 将a标签弄成一个按钮 <a class="btn btn-danger" href="#">
<i class="fa fa-trash-o fa-lg"></i> Delete</a> <script src="../day%2058%20bootstrip/jquery-3.2.1.min.js"></script>
<script src="../day%2058%20bootstrip/bootstrap-3.3.7-dist/js/bootstrap.min.js "></script>
</body>
</html>
弹出模态框
模态框和绑定模态框的按钮
<!-- Button trigger modal -->
<button type="button" class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">
Launch demo modal
</button> <!-- Modal -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
<div class="modal-dialog" role="document">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
<h4 class="modal-title" id="myModalLabel">Modal title</h4>
</div>
<div class="modal-body">
...
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
<button type="button" class="btn btn-primary">Save changes</button>
</div>
</div>
</div>
</div>
触发模态框发生的JS代码 注意要引入Bootstrap的min.js文件
<script src="../day%2058%20bootstrip/jquery-3.2.1.min.js"></script>
<!--除了要引入jQuery 还要引入bootstrap 的js 文件-->
<script src="../day%2058%20bootstrip/bootstrap-3.3.7-dist/js/bootstrap.min.js "></script>
<script> //注意弹出模态框的写法。 .modal这个是固定的写法，后边的也是固定写法
$("#myModal").modal({
backdrop: true,
keyboard: false
}); </script>
下拉菜单（用到了ul ）
http://v3.bootcss.com/components/
将下拉菜单触发器和下拉菜单都包裹在 .dropdown 里，或者另一个声明了 position: relative; 的元素。然后加入组成菜单的 HTML 代码。
Dropdown
<div class="dropup">
<button class="btn btn-default dropdown-toggle" type="button" id="dropdownMenu2" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Dropup
//小三角
<span class="caret"></span>
</button>
<ul class="dropdown-menu" aria-labelledby="dropdownMenu2">
<li><a href="#">Action</a></li>
<li><a href="#">Another action</a></li>
<li><a href="#">Something else here</a></li>
//分割线
<li role="separator" class="divider"></li>
<li><a href="#">Separated link</a></li>
</ul>
</div>
创建表单代码 内有重要结构
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Title</title>
<link rel="stylesheet" href="Font-Awesome-master/css/font-awesome.min.css">
<link rel="stylesheet" href="../day%2058%20bootstrip/bootstrap-3.3.7-dist/css/bootstrap.min.css">
</head>
<body>
<div class="container">
<!--页头-->
<div class="page-header">
<h1>信息卡收集
<small>共三步</small>
</h1>
</div>
<!--进度条-->
<div class="progress">
<div class="progress-bar" role="progressbar" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100"
style="width: 30%;">
30%
</div>
</div>
面板
<div class="panel panel-primary">
<!--面板内容-->
<!--起始框-->
<div class=" panel-heading">
<h3 class="panel-title">基本信息<span class="glyphicon glyphicon-pushpin pull-right" aria-hidden="true"></span>
</h3> </div>
<!--剩下的空间-->
<div class="row panel-body ">
<!--设置表单块 占据左半边而且像右偏移-->
<div class="col-md-offset-1 col-md-4">
<!--表单-->
<form class="form-horizontal">
<!--姓名-->
<div class="form-group">
<!--这里注意设置成块级的 label占3个位置-->
<label for="inputName" class="col-sm-3 control-label">姓名</label>
<!--输入框在9个位置-->
<div class="col-sm-9">
<input type="text" class="form-control" id="inputName" placeholder="姓名">
</div>
</div>
<!--手机号-->
<div class="form-group">
<label for="inputNumber" class="col-sm-3 control-label">手机</label>
<div class="col-sm-9">
<input type="text" class="form-control" id="inputNumber" placeholder="请输入手机号">
</div>
</div>
<!--Email-->
<div class="form-group">
<label for="inputEmail3" class="col-sm-3 control-label">邮箱</label>
<div class="col-sm-9">
<input type="email" class="form-control" id="inputEmail3" placeholder="请输入邮箱">
</div>
</div>
<!--密码-->
<div class="form-group">
<label for="inputPassword3" class="col-sm-3 control-label">密码</label>
<div class="col-sm-9">
<input type="password" class="form-control" id="inputPassword3" placeholder="请输入密码">
</div>
</div>
<!--上传-->
<div class="form-group">
<!---->
<label for="exampleInputFile" class="col-sm-3 control-label">头像</label>
<div >
<input class=" col-md-offset-0.3" type="file" id="exampleInputFile">
<p class="help-block col-md-offset-3">Example block-level help text here.</p>
</div> </div>
<!--选项-->
<div class="form-group">
<label class="col-md-2 col-md-offset-1">选择</label>
<div class="checkbox col-md-6">
<label>
<input type="checkbox"> Check me out
</label>
<label>
<input type="checkbox"> Check me out
</label>
<label>
<input type="checkbox"> Check me out
</label>
</div>
</div>
<!--按钮-->
<div class="form-group">
<div class="col-sm-offset-2 col-sm-10">
<button type="submit" class="btn btn-primary btn-block">Sign in</button>
</div>
</div>
</form>
</div>
</div>
</div>
</div> <script src="../day%2058%20bootstrip/jquery-3.2.1.min.js"></script>
</body>
</html>
模态框
注意按键button 中代码要这样写
<button type="button" class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">
Launch demo modal
</button>
还有就是 模态框一定要是body的直系子元素，才能正常弹出<!-- Button trigger modal -->
<button type="button" class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">
//注意，目标一定模态框的ID 按键类型是 button
Launch demo modal
</button> <!-- Modal -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
<div class="modal-dialog" role="document">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
<h4 class="modal-title" id="myModalLabel">Modal title</h4>
</div>
<div class="modal-body">
...
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
<button type="button" class="btn btn-primary">Save changes</button>
</div>
</div>
</div>
</div>