Bootstrap 按钮

本章将通过实例讲解如何使用 Bootstrap 按钮。任何带有 class .btn 的元素都会继承圆角灰色按钮的默认外观。但是 Bootstrap 提供了一些选项来定义按钮的样式，具体如下表所示：

以下样式可用于<a>, <button>, 或 <input> 元素上：

下面的实例演示了上面所有的按钮 class：

实例

<!–
标准的按钮
–>

<
button

type
=
“
button
“

class
=
“
btn btn-default
“
>
默认按钮
</
button
>

<!–
提供额外的视觉效果，标识一组按钮中的原始动作
–>

<
button

type
=
“
button
“

class
=
“
btn btn-primary
“
>
原始按钮
</
button
>

<!–
表示一个成功的或积极的动作
–>

<
button

type
=
“
button
“

class
=
“
btn btn-success
“
>
成功按钮
</
button
>

<!–
信息警告消息的上下文按钮
–>

<
button

type
=
“
button
“

class
=
“
btn btn-info
“
>
信息按钮
</
button
>

<!–
表示应谨慎采取的动作
–>

<
button

type
=
“
button
“

class
=
“
btn btn-warning
“
>
警告按钮
</
button
>

<!–
表示一个危险的或潜在的负面动作
–>

<
button

type
=
“
button
“

class
=
“
btn btn-danger
“
>
危险按钮
</
button
>

<!–
并不强调是一个按钮，看起来像一个链接，但同时保持按钮的行为
–>

<
button

type
=
“
button
“

class
=
“
btn btn-link
“
>
链接按钮
</
button
>


尝试一下 »

结果如下所示：

按钮大小

下表列出了获得各种大小按钮的 class：

下面的实例演示了上面所有的按钮 class：

实例

<
p
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary btn-lg
“
>
大的原始按钮
</
button
>

<
button

type
=
“
button
“

class
=
“
btn btn-default btn-lg
“
>
大的按钮
</
button
>

</
p
>

<
p
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary
“
>
默认大小的原始按钮
</
button
>

<
button

type
=
“
button
“

class
=
“
btn btn-default
“
>
默认大小的按钮
</
button
>

</
p
>

<
p
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary btn-sm
“
>
小的原始按钮
</
button
>

<
button

type
=
“
button
“

class
=
“
btn btn-default btn-sm
“
>
小的按钮
</
button
>

</
p
>

<
p
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary btn-xs
“
>
特别小的原始按钮
</
button
>

<
button

type
=
“
button
“

class
=
“
btn btn-default btn-xs
“
>
特别小的按钮
</
button
>

</
p
>

<
p
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary btn-lg btn-block
“
>
块级的原始按钮
</
button
>

<
button

type
=
“
button
“

class
=
“
btn btn-default btn-lg btn-block
“
>
块级的按钮
</
button
>

</
p
>


尝试一下 »

结果如下所示：

按钮状态

Bootstrap 提供了激活、禁用等按钮状态的 class，下面将进行详细讲解。

激活状态

按钮在激活时将呈现为被按压的外观（深色的背景、深色的边框、阴影）。

下表列出了让按钮元素和锚元素呈激活状态的 class：

下面的实例演示了这点：

实例

<
p
>

<
button

type
=
“
button
“

class
=
“
btn btn-default btn-lg
“
>
默认按钮
</
button
>

<
button

type
=
“
button
“

class
=
“
btn btn-default btn-lg active
“
>
激活按钮
</
button
>

</
p
>

<
p
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary btn-lg
“
>
原始按钮
</
button
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary btn-lg active
“
>
激活的原始按钮
</
button
>

</
p
>


尝试一下 »

结果如下所示：

禁用状态

当您禁用一个按钮时，它的颜色会变淡 50%，并失去渐变。

下表列出了让按钮元素和锚元素呈禁用状态的 class：

下面的实例演示了这点：

实例

<
p
>

<
button

type
=
“
button
“

class
=
“
btn btn-default btn-lg
“
>
默认按钮
</
button
>

<
button

type
=
“
button
“

class
=
“
btn btn-default btn-lg
“

disabled
=
“
disabled
“
>
禁用按钮
</
button
>

</
p
>

<
p
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary btn-lg
“
>
原始按钮
</
button
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary btn-lg
“

disabled
=
“
disabled
“
>
禁用的原始按钮
</
button
>

</
p
>

<
p
>

<
a

href
=
“
#
“

class
=
“
btn btn-default btn-lg
“

role
=
“
button
“
>
链接
</
a
>

<
a

href
=
“
#
“

class
=
“
btn btn-default btn-lg disabled
“

role
=
“
button
“
>
禁用链接
</
a
>

</
p
>

<
p
>

<
a

href
=
“
#
“

class
=
“
btn btn-primary btn-lg
“

role
=
“
button
“
>
原始链接
</
a
>

<
a

href
=
“
#
“

class
=
“
btn btn-primary btn-lg disabled
“

role
=
“
button
“
>
禁用的原始链接
</
a
>

</
p
>


尝试一下 »

结果如下所示：

按钮标签

您可以在 <a>、<button> 或 <input> 元素上使用按钮 class。但是建议您在 <button> 元素上使用按钮 class，避免跨浏览器的不一致性问题。

下面的实例演示了这点：

实例

<
a

class
=
“
btn btn-default
“

href
=
“
#
“

role
=
“
button
“
>
链接
</
a
>

<
button

class
=
“
btn btn-default
“

type
=
“
submit
“
>
按钮
</
button
>

<
input

class
=
“
btn btn-default
“

type
=
“
button
“

value
=
“
输入
“
>

<
input

class
=
“
btn btn-default
“

type
=
“
submit
“

value
=
“
提交
“
>


尝试一下 »

结果如下所示：

按钮组

在 div 中直接使用 .btn-group 可以创建按钮组：

实例

<
div

class
=
“
btn-group
“
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary
“
>
Apple
</
button
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary
“
>
Samsung
</
button
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary
“
>
Sony
</
button
>

</
div
>


尝试一下 »

使用 .btn-group-lg|sm|xs 来控制按钮组的大小：

实例

<
div

class
=
“
btn-group btn-group-lg
“
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary
“
>
Apple
</
button
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary
“
>
Samsung
</
button
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary
“
>
Sony
</
button
>

</
div
>


尝试一下 »

如果要设置垂直方向的按钮可以通过 .btn-group-vertical 类来设置：

实例

<
div

class
=
“
btn-group-vertical
“
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary
“
>
Apple
</
button
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary
“
>
Samsung
</
button
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary
“
>
Sony
</
button
>

</
div
>


尝试一下 »

自适应大小的按钮组

可以通过 .btn-group-justified 类来设置自适应大小的按钮组。

以下实例使用 a 标签来展示：

实例

<
div

class
=
“
btn-group btn-group-justified
“
>

<
a

href
=
“
#
“

class
=
“
btn btn-primary
“
>
Apple
</
a
>

<
a

href
=
“
#
“

class
=
“
btn btn-primary
“
>
Samsung
</
a
>

<
a

href
=
“
#
“

class
=
“
btn btn-primary
“
>
Sony
</
a
>

</
div
>


尝试一下 »

注意: 如果是 <button> 元素, 你需要在外层使用 .btn-group 类来包裹:

实例

<
div

class
=
“
btn-group btn-group-justified
“
>

<
div

class
=
“
btn-group
“
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary
“
>
Apple
</
button
>

</
div
>

<
div

class
=
“
btn-group
“
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary
“
>
Samsung
</
button
>

</
div
>

<
div

class
=
“
btn-group
“
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary
“
>
Sony
</
button
>

</
div
>

</
div
>


尝试一下 »

内嵌下拉菜单的按钮组

按钮组内嵌的按钮可以设置下拉菜单，如下实例：

实例

<
div

class
=
“
btn-group
“
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary
“
>
Apple
</
button
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary
“
>
Samsung
</
button
>

<
div

class
=
“
btn-group
“
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary dropdown-toggle
“

data-toggle
=
“
dropdown
“
>
Sony
<
span

class
=
“
caret
“
>
</
span
>
</
button
>

<
ul

class
=
“
dropdown-menu
“

role
=
“
menu
“
>

<
li
>
<
a

href
=
“
#
“
>
Tablet
</
a
>
</
li
>

<
li
>
<
a

href
=
“
#
“
>
Smartphone
</
a
>
</
li
>

</
ul
>

</
div
>

</
div
>


尝试一下 »

分割按钮

实例

<
div

class
=
“
btn-group
“
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary
“
>
Sony
</
button
>

<
button

type
=
“
button
“

class
=
“
btn btn-primary dropdown-toggle
“

data-toggle
=
“
dropdown
“
>

<
span

class
=
“
caret
“
>
</
span
>

</
button
>

<
ul

class
=
“
dropdown-menu
“

role
=
“
menu
“
>

<
li
>
<
a

href
=
“
#
“
>
Tablet
</
a
>
</
li
>

<
li
>
<
a

href
=
“
#
“
>
Smartphone
</
a
>
</
li
>

</
ul
>

</
div
>


尝试一下 »