简介
在本教程中，您将看到如何使用 Bootstrap 创建加载、重定向或动作状态的进度条。
基本的、条纹的和动画的进度条实例
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Example of using default thumbnails from ziqiangxuetang.com</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="Example of using default thumbnails from ziqiangxuetang.com">
<meta name="author" content="">
<!-- Le styles -->
<link href="../bootstrap/bootstrap-2.0.3.css" rel="stylesheet">
<link href="../bootstrap/twitter-bootstrap-v2/docs/assets/css/example-fixed-layout.css" rel="stylesheet">
<!-- Le HTML5 shim, for IE6-8 support of HTML5 elements -->
<!--[if lt IE 9]>
<script src="//html5shim.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
<!-- Le fav and touch icons -->
<link rel="shortcut icon" href="../bootstrap/twitter-bootstrap-v2/docs/examples/images/favicon.ico">
<link rel="apple-touch-icon" href="../bootstrap/twitter-bootstrap-v2/docs/examples/images/apple-touch-icon.png">
<link rel="apple-touch-icon" sizes="72x72" href="../bootstrap/twitter-bootstrap-v2/docs/examples/images/apple-touch-icon-72x72.png">
<link rel="apple-touch-icon" sizes="114x114" href="../bootstrap/twitter-bootstrap-v2/docs/examples/images/apple-touch-icon-114x114.png">
</head>
<body>
<div class="container">
<div class="row">
<div class="span4">
<h3>A basic Progress Bar with vertical gradient</h3>
<div class="progress">
<div class="bar"
style="width: 60%;"></div>
</div>
<h3>A striped Progress Bar, uses gradient to create a striped effect</h3>
<div class="progress progress-striped">
<div class="bar" style="width: 60%;"></div>
</div>
<h3>An animated Progress Bar</h3>
<div class="progress progress-striped active">
<div class="bar" style="width: 50%;"></div>
</div>
</div>
</div>
<hr>
</div> <!-- /container -->
</body>
</html>
请注意，如果要显示第三种进度条，请添加 '.active' class 来让它具有运动感。Bootstrap 使用 css3 过渡效果创建这个动画。您也可以通过 JavaScript 动态地调整进度条的宽度。这样，就可以掌握进度行为。
在创建进度条时，您可以使用其他的颜色。
带有其他颜色的进度条实例
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Example of Progress Bars with additional colors using Bootstrap</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="Example of Progress Bars with additional colors using Bootstrap, created by ziqiangxuetang">
<meta name="author" content="">
<!-- Le styles -->
<link href="../bootstrap/bootstrap-2.0.3.css" rel="stylesheet">
<link href="../bootstrap/twitter-bootstrap-v2/docs/assets/css/example-fixed-layout.css" rel="stylesheet">
<!-- Le HTML5 shim, for IE6-8 support of HTML5 elements -->
<!--[if lt IE 9]>
<script src="//html5shim.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
<!-- Le fav and touch icons -->
<link rel="shortcut icon" href="../bootstrap/twitter-bootstrap-v2/docs/examples/images/favicon.ico">
<link rel="apple-touch-icon" href="../bootstrap/twitter-bootstrap-v2/docs/examples/images/apple-touch-icon.png">
<link rel="apple-touch-icon" sizes="72x72" href="../bootstrap/twitter-bootstrap-v2/docs/examples/images/apple-touch-icon-72x72.png">
<link rel="apple-touch-icon" sizes="114x114" href="../bootstrap/twitter-bootstrap-v2/docs/examples/images/apple-touch-icon-114x114.png">
</head>
<body>
<div class="container">
<div class="row">
<div class="span4">
<h3>Progress bars may also have additional colors</h3>
<div class="progress progress-info progress-striped" style="margin-bottom: 9px;">
<div class="bar" style="width: 20%"></div>
</div>
<div class="progress progress-success progress-striped active" style="margin-bottom: 9px;">
<div class="bar" style="width: 40%"></div>
</div>
<div class="progress progress-warning progress-striped" style="margin-bottom: 9px;">
<div class="bar" style="width: 60%"></div>
</div>
<div class="progress progress-danger progress-striped active" style="margin-bottom: 9px;">
<div class="bar" style="width: 80%"></div>
</div>
</div>
</div>
</div>
<hr>
</div> <!-- /container -->
</body>
</html>
浏览器支持
我们已经在不同的浏览器中测试了上面的两个实例。我们发现，在 Firefox 12 和 Chrome 19.0.1084.52 中能正常显示，但是在 Opera 11.62 中不能显示动画效果，即便您可以看到条纹和梯度。在 Internet Explorer 8 中，所有的显示效果都不佳，没有动画，也没有条纹和梯度。
