Bootstrap 导航元素
本章我们将讲解 Bootstrap 提供的用于定义导航元素的一些选项。它们使用相同的标记和基类 .nav。Bootstrap 也提供了一个用于共享标记和状态的帮助器类。改变修饰的 class，可以在不同的样式间进行切换。
表格导航或标签
创建一个标签式的导航菜单：
-
以一个带有 class .nav 的无序列表开始。
-
添加 class .nav-tabs。
下面的实例演示了这点：
-------------------------------------------------- ----------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------ --------------------------------------------------------------------------- --------------------------------------------------------------------------- ------------------------------------------------------------------------------ ---------------------------------------------------------------------------- ----------------------------------------------------------------------------------------------------------------
结果如下所示：
胶囊式的导航菜单
基本的胶囊式导航菜单
如果需要把标签改成胶囊的样式，只需要使用 class .nav-pills 代替 .nav-tabs 即可，其他的步骤与上面相同。
下面的实例演示了这点：
-------------------------------------------------- ------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------ --------------------------------------------------------------------------- --------------------------------------------------------------------------- ------------------------------------------------------------------------------ ---------------------------------------------------------------------------- ----------------------------------------------------------------------------------------------------------------
结果如下所示：
垂直的胶囊式导航菜单
您可以在使用 class .nav、.nav-pills 的同时使用 class .nav-stacked，让胶囊垂直堆叠。
下面的实例演示了这点：
-------------------------------------------------- ------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------ --------------------------------------------------------------------------- --------------------------------------------------------------------------- ------------------------------------------------------------------------------ ---------------------------------------------------------------------------- ----------------------------------------------------------------------------------------------------------------
结果如下所示：
两端对齐的导航
您可以在屏幕宽度大于 768px 时，通过在分别使用 .nav、.nav-tabs 或 .nav、.nav-pills 的同时使用 class .nav-justified，让标签式或胶囊式导航菜单与父元素等宽。在更小的屏幕上，导航链接会堆叠。
下面的实例演示了这点：
-------------------------------------------------- ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------ --------------------------------------------------------------------------- --------------------------------------------------------------------------- ------------------------------------------------------------------------------ ---------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------ --------------------------------------------------------------------------- --------------------------------------------------------------------------- ------------------------------------------------------------------------------ ---------------------------------------------------------------------------- ----------------------------------------------------------------------------------------------------------------
结果如下所示：
禁用链接
对每个 .nav class，如果添加了 .disabled class，则会创建一个灰色的链接，同时禁用了该链接的 :hover 状态，如下面的实例所示：
-------------------------------------------------- ------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------ --------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------ ---------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------ --------------------------------------------------------------------------- --------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------- -------------------------------------------------------------------------------------- --------------------------
结果如下所示：
下拉菜单
导航菜单与下拉菜单使用相似的语法。默认情况下，列表项的锚与一些数据属性协同合作来触发带有 .dropdown-menu class 的无序列表。
带有下拉菜单的标签
向标签添加下拉菜单的步骤如下：
-
以一个带有 class .nav 的无序列表开始。
-
添加 class .nav-tabs。
-
添加带有 .dropdown-menu class 的无序列表。
-------------------------------------------------- ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------ --------------------------------------------------------------------------- --------------------------------------------------------------------------- ------------------------------------------------------------------------------ -------------------------------------------------- -------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------ ---------------------------------------------- ------------------------------------------------------------------------- ----------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------------ --------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------ ----------------------------------------------------------------------------------------------------------------- ----------------------------------------------- ----------------------------- ----------------------------------------------------------------------------------------------------------------
结果如下所示：
带有下拉菜单的胶囊
步骤与创建带有下拉菜单的标签相同，只是需要把 .nav-tabs class 改为 .nav-pills，如下面的实例所示：
-------------------------------------------------- ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------ --------------------------------------------------------------------------- --------------------------------------------------------------------------- ------------------------------------------------------------------------------ -------------------------------------------------- -------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------ ---------------------------------------------- ------------------------------------------------------------------------- ----------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------------ --------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------ ----------------------------------------------------------------------------------------------------------------- ----------------------------------------------- ----------------------------- ----------------------------------------------------------------------------------------------------------------
结果如下所示：
