本文概述
在Bootstrap中,存在三种类型的表单布局:
- 垂直形式(默认)
- 水平形式
- 内联表格
自举表格规则
这3种表单布局有3条标准规则:
- 始终使用<form role =“ form”>(有助于提高使用屏幕阅读器的用户的可访问性)
- 在<div class =“ form-group”>中包装标签和表单控件(需要最佳间距)
- 将类.form-control添加到所有文本<input>,<textarea>和<select>元素
1)引导程序垂直形式(默认)
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap example</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css"/>
</head>
<body>
<div class="container">
<h1>Vertical Form Example</h1>
<form style="width:300px">
<div class="form-group">
<label for="exampleInputEmail1">Email address</label>
<input type="email" class="form-control" id="exampleInputEmail1" placeholder="Email">
</div>
<div class="form-group">
<label for="exampleInputPassword1">Password</label>
<input type="password" class="form-control" id="exampleInputPassword1" placeholder="Password">
</div>
<button type="submit" class="btn btn-default">Login</button>
</form>
</div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
</body>
</html>
2)Bootstrap内联表格
在Bootstrap内联表单中,所有元素都是内联的,左对齐,并且标签在旁边。
此示例仅适用于视口内宽度至少为768px的表单!
例:
<!DOCTYPE html>
3)自举水平形式
如果要创建水平表单,则必须添加一些其他规则。
水平形式的其他规则:
- 将类.form-horizontal添加到<form>元素
- 将class .control-label添加到所有<label>元素
例:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
</head>
<body>
<div class="container">
<h2>Horizontal form Example</h2>
<form class="form-horizontal" role="form">
<form style="width:300px">
<div class="form-group">
<label class="control-label col-sm-2" for="email">Email:</label>
<div class="col-sm-10">
<input type="email" class="form-control" id="email" placeholder="Enter email">
</div>
</div>
<div class="form-group">
<label class="control-label col-sm-2" for="pwd">Password:</label>
<div class="col-sm-10">
<input type="password" class="form-control" id="pwd" placeholder="Enter password">
</div>
</div>
<div class="form-group">
<div class="col-sm-offset-2 col-sm-10">
<button type="submit" class="btn btn-default">Submit</button>
</div>
</div>
</form>
</div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
</body>
</html>
Bootstrap 4表格
在Bootstrap4中,表单控件会自动使用Bootstrap接收某些全局样式。
所有%20textual%20%3Cinput%3E,%20%3Ctextarea%3E,%20和%20%3Cselect%3E%20elements%20with%20class%20.form-control%20have%20a%20width%20of%20100%。
堆叠(全角)形式
引导程序4提供了全宽度的堆叠形式。
例:
让我们以创建带有两个输入字段,一个复选框和一个提交按钮的堆叠表单为例。
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.6/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<h2>Stacked form</h2>
<form>
<div class="form-group">
<label for="email">Email:</label>
<input type="email" class="form-control" id="email" placeholder="Enter email">
</div>
<div class="form-group">
<label for="pwd">Password:</label>
<input type="password" class="form-control" id="pwd" placeholder="Enter password">
</div>
<div class="form-check">
<label class="form-check-label">
<input class="form-check-input" type="checkbox"> Remember me
</label>
</div>
<button type="submit" class="btn btn-primary">Submit</button>
</form>
</div>
</body>
</html>