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：

为按钮添加基本样式 .btn-default 默认/标准按钮 .btn-primary 原始按钮样式（未被操作） .btn-success 表示成功的动作 .btn-info 该样式可用于要弹出信息的按钮 .btn-warning 表示需要谨慎操作的按钮 .btn-danger 表示一个危险动作的按钮操作 .btn-link 让按钮看起来像个链接 (仍然保留按钮行为) .btn-lg 制作一个大按钮 .btn-sm 制作一个小按钮 .btn-xs 制作一个超小按钮 .btn-block 块级按钮(拉伸至父元素100%的宽度) .active 按钮被点击 .disabled

下面的实例演示了上面所有的按钮 class：

< button type = " button " class = " btn btn-default " > 默认按钮 </ button >  < button type = " button " class = " btn btn-primary " > 原始按钮 </ button >  < button type = " button " class = " btn btn-success " > 成功按钮 </ button >  < button type = " button " class = " btn btn-info " > 信息按钮 </ button >  < button type = " button " class = " btn btn-warning " > 警告按钮 </ button >  < button type = " button " class = " btn btn-danger " > 危险按钮 </ button >  < button type = " button " class = " btn btn-link " > 链接按钮 </ button >

尝试一下 »

结果如下所示：

< 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 > < 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 > < 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 > < 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 > < 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 > 尝试一下 »

结果如下所示：

< 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 > < 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 > 尝试一下 »

结果如下所示：

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：

元素Class 按钮元素添加 disabled 属性到 <button> 按钮。锚元素添加 disabled class 到 <a> 按钮。

下面的实例演示了这点：

< 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 > < 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 > < 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 > < 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 > 尝试一下 »

结果如下所示：

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：

< 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：

< 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：

< 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：

< 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：

< 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:

< 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：

< 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 > </ div > </ div >

尝试一下 »

< 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 > </ div >

尝试一下 »