Bootstrap 进度条
本章将讲解 Bootstrap 进度条。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。
Bootstrap 进度条使用 CSS3 过渡和动画来获得该效果。Internet Explorer 9 及之前的版本和旧版的 Firefox 不支持该特性，Opera 12 不支持动画。
默认的进度条
创建一个基本的进度条的步骤如下：
- 添加一个带有 class .progress 的 <div>。
- 接着，在上面的 <div> 内，添加一个带有 class .progress-bar 的空的 <div>。
- 添加一个带有百分比表示的宽度的 style 属性，例如 style="width: 60%"; 表示进度条在 60% 的位置。
让我们看看下面的实例， .sr-only 类可以隐藏文本内容：
实例
<
div
class
=
"
progress
"
>
<
div
class
=
"
progress-bar
"
role
=
"
progressbar
"
aria-valuenow
=
"
60
"
aria-valuemin
=
"
"
aria-valuemax
=
"
100
"
style
=
"
width: 40%;
"
>
<
span
class
=
"
sr-only
"
>
40% 完成
</
span
>
</
div
>
</
div
>
尝试一下 »
结果如下所示：
也可以在进度条中设置文本内容：
实例
<
div
class
=
"
progress
"
>
<
div
class
=
"
progress-bar
"
role
=
"
progressbar
"
aria-valuenow
=
"
70
"
aria-valuemin
=
"
"
aria-valuemax
=
"
100
"
style
=
"
width:70%
"
>
70%
</
div
>
</
div
>
尝试一下 »
结果如下所示：
交替的进度条
创建不同样式的进度条的步骤如下：
- 添加一个带有 class .progress 的 <div>。
- 接着，在上面的 <div> 内，添加一个带有 class .progress-bar 和 class progress-bar-* 的空的 <div>。其中，* 可以是 success、info、warning、danger 。
- 添加一个带有百分比表示的宽度的 style 属性，例如 style="60%"; 表示进度条在 60% 的位置。
让我们看看下面的实例：
实例
<
div
class
=
"
progress
"
>
<
div
class
=
"
progress-bar progress-bar-success
"
role
=
"
progressbar
"
aria-valuenow
=
"
60
"
aria-valuemin
=
"
"
aria-valuemax
=
"
100
"
style
=
"
width: 90%;
"
>
<
span
class
=
"
sr-only
"
>
90% 完成（成功）
</
span
>
</
div
>
</
div
>
<
div
class
=
"
progress
"
>
<
div
class
=
"
progress-bar progress-bar-info
"
role
=
"
progressbar
"
aria-valuenow
=
"
60
"
aria-valuemin
=
"
"
aria-valuemax
=
"
100
"
style
=
"
width: 30%;
"
>
<
span
class
=
"
sr-only
"
>
30% 完成（信息）
</
span
>
</
div
>
</
div
>
<
div
class
=
"
progress
"
>
<
div
class
=
"
progress-bar progress-bar-warning
"
role
=
"
progressbar
"
aria-valuenow
=
"
60
"
aria-valuemin
=
"
"
aria-valuemax
=
"
100
"
style
=
"
width: 20%;
"
>
<
span
class
=
"
sr-only
"
>
20% 完成（警告）
</
span
>
</
div
>
</
div
>
<
div
class
=
"
progress
"
>
<
div
class
=
"
progress-bar progress-bar-danger
"
role
=
"
progressbar
"
aria-valuenow
=
"
60
"
aria-valuemin
=
"
"
aria-valuemax
=
"
100
"
style
=
"
width: 10%;
"
>
<
span
class
=
"
sr-only
"
>
10% 完成（危险）
</
span
>
</
div
>
</
div
>
尝试一下 »
结果如下所示：
显示进度条文本内容：
实例
<
div
class
=
"
progress
"
>
<
div
class
=
"
progress-bar progress-bar-success
"
role
=
"
progressbar
"
aria-valuenow
=
"
40
"
aria-valuemin
=
"
"
aria-valuemax
=
"
100
"
style
=
"
width:40%
"
>
40% Complete (success)
</
div
>
</
div
>
<
div
class
=
"
progress
"
>
<
div
class
=
"
progress-bar progress-bar-info
"
role
=
"
progressbar
"
aria-valuenow
=
"
50
"
aria-valuemin
=
"
"
aria-valuemax
=
"
100
"
style
=
"
width:50%
"
>
50% Complete (info)
</
div
>
</
div
>
<
div
class
=
"
progress
"
>
<
div
class
=
"
progress-bar progress-bar-warning
"
role
=
"
progressbar
"
aria-valuenow
=
"
60
"
aria-valuemin
=
"
"
aria-valuemax
=
"
100
"
style
=
"
width:60%
"
>
60% Complete (warning)
</
div
>
</
div
>
<
div
class
=
"
progress
"
>
<
div
class
=
"
progress-bar progress-bar-danger
"
role
=
"
progressbar
"
aria-valuenow
=
"
70
"
aria-valuemin
=
"
"
aria-valuemax
=
"
100
"
style
=
"
width:70%
"
>
70% Complete (danger)
</
div
>
</
div
>
尝试一下 »
结果如下所示：
条纹的进度条
创建一个条纹的进度条的步骤如下：
- 添加一个带有 class .progress 和 .progress-striped 的 <div>。
- 接着，在上面的 <div> 内，添加一个带有 class .progress-bar 和 class progress-bar-* 的空的 <div>。其中，* 可以是 success、info、warning、danger 。
- 添加一个带有百分比表示的宽度的 style 属性，例如 style="60%"; 表示进度条在 60% 的位置。
让我们看看下面的实例：
实例
<
div
class
=
"
progress progress-striped
"
>
<
div
class
=
"
progress-bar progress-bar-success
"
role
=
"
progressbar
"
aria-valuenow
=
"
60
"
aria-valuemin
=
"
"
aria-valuemax
=
"
100
"
style
=
"
width: 90%;
"
>
<
span
class
=
"
sr-only
"
>
90% 完成（成功）
</
span
>
</
div
>
</
div
>
<
div
class
=
"
progress progress-striped
"
>
<
div
class
=
"
progress-bar progress-bar-info
"
role
=
"
progressbar
"
aria-valuenow
=
"
60
"
aria-valuemin
=
"
"
aria-valuemax
=
"
100
"
style
=
"
width: 30%;
"
>
<
span
class
=
"
sr-only
"
>
30% 完成（信息）
</
span
>
</
div
>
</
div
>
<
div
class
=
"
progress progress-striped
"
>
<
div
class
=
"
progress-bar progress-bar-warning
"
role
=
"
progressbar
"
aria-valuenow
=
"
60
"
aria-valuemin
=
"
"
aria-valuemax
=
"
100
"
style
=
"
width: 20%;
"
>
<
span
class
=
"
sr-only
"
>
20% 完成（警告）
</
span
>
</
div
>
</
div
>
<
div
class
=
"
progress progress-striped
"
>
<
div
class
=
"
progress-bar progress-bar-danger
"
role
=
"
progressbar
"
aria-valuenow
=
"
60
"
aria-valuemin
=
"
"
aria-valuemax
=
"
100
"
style
=
"
width: 10%;
"
>
<
span
class
=
"
sr-only
"
>
10% 完成（危险）
</
span
>
</
div
>
</
div
>
尝试一下 »
结果如下所示：
动画的进度条
创建一个动画的进度条的步骤如下：
- 添加一个带有 class .progress 和 .progress-striped 的 <div>。同时添加 class .active 。
- 接着，在上面的 <div> 内，添加一个带有 class .progress-bar 的空的 <div>。
- 添加一个带有百分比表示的宽度的 style 属性，例如 style="60%"; 表示进度条在 60% 的位置。
这将会使条纹具有从右向左的运动感。
让我们看看下面的实例：
实例
<
div
class
=
"
progress progress-striped active
"
>
<
div
class
=
"
progress-bar progress-bar-success
"
role
=
"
progressbar
"
aria-valuenow
=
"
60
"
aria-valuemin
=
"
"
aria-valuemax
=
"
100
"
style
=
"
width: 40%;
"
>
<
span
class
=
"
sr-only
"
>
40% 完成
</
span
>
</
div
>
</
div
>
尝试一下 »
结果如下所示：
堆叠的进度条
您甚至可以堆叠多个进度条。把多个进度条放在相同的 .progress 中即可实现堆叠，如下面的实例所示：
实例
<
div
class
=
"
progress
"
>
<
div
class
=
"
progress-bar progress-bar-success
"
role
=
"
progressbar
"
aria-valuenow
=
"
60
"
aria-valuemin
=
"
"
aria-valuemax
=
"
100
"
style
=
"
width: 40%;
"
>
<
span
class
=
"
sr-only
"
>
40% 完成
</
span
>
</
div
>
<
div
class
=
"
progress-bar progress-bar-info
"
role
=
"
progressbar
"
aria-valuenow
=
"
60
"
aria-valuemin
=
"
"
aria-valuemax
=
"
100
"
style
=
"
width: 30%;
"
>
<
span
class
=
"
sr-only
"
>
30% 完成（信息）
</
span
>
</
div
>
<
div
class
=
"
progress-bar progress-bar-warning
"
role
=
"
progressbar
"
aria-valuenow
=
"
60
"
aria-valuemin
=
"
"
aria-valuemax
=
"
100
"
style
=
"
width: 20%;
"
>
<
span
class
=
"
sr-only
"
>
20% 完成（警告）
</
span
>
</
div
>
</
div
>
尝试一下 »
结果如下所示：
进度条大小
我们可以通过通过 height 属性来设置进度条的大小：
实例
<
div
class
=
"
progress
"
style
=
"
height: 1px;
"
>
<
div
class
=
"
progress-bar
"
role
=
"
progressbar
"
style
=
"
width: 25%;
"
aria-valuenow
=
"
25
"
aria-valuemin
=
"
"
aria-valuemax
=
"
100
"
>
</
div
>
</
div
>
<
div
class
=
"
progress
"
style
=
"
height: 20px;
"
>
<
div
class
=
"
progress-bar
"
role
=
"
progressbar
"
style
=
"
width: 25%;
"
aria-valuenow
=
"
25
"
aria-valuemin
=
"
"
aria-valuemax
=
"
100
"
>
</
div
>
</
div
>
尝试一下 »
结果如下所示：
