如何在 Bootstrap 中制作 3 级折叠菜单? [英] How to make a 3-level collapsing menu in Bootstrap?

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本文介绍了如何在 Bootstrap 中制作 3 级折叠菜单?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在尝试为 Bootstrap 制作一个 3 级折叠导航栏菜单，但我无法打开第三级.

这是我拥有的两级菜单:

<link href="https://stackpath.bootstrapcdn.com/twitter-bootstrap/2.3.2/css/bootstrap-combined.min.css" rel="样式表"/><div class="navbar navbar-fixed-top"><div class="navbar-inner"><div class="容器"><a class="btn btn-navbar" data-toggle="collapse" data-target=".nav-collapse"><span class="icon-bar"></span><span class="icon-bar"></span><span class="icon-bar"></span></a><div class="nav-collapse"><ul class="nav"><a class="brand" href="#">现在的想法</a><li class="active"><a href="#">首页</a></li><li><a href="#">博客</a></li><li><a href="#">关于</a></li><li><a href="#">帮助</a></li><li class="dropdown" id="accountmenu"><a class="dropdown-toggle" data-toggle="dropdown" href="#">账户设置<b class="caret"></b></a><ul class="下拉菜单"><li><a href="#">登录</a></li><li><a href="#">注册</a></li><li class="divider"></li><li><a href="#">注销</a></li><ul class="nav pull-right">

<!--/.nav-collapse -->

我认为这样的事情会奏效:

<link href="https://stackpath.bootstrapcdn.com/twitter-bootstrap/2.3.2/css/bootstrap-combined.min.css" rel="样式表"/><div class="navbar navbar-fixed-top"><div class="navbar-inner"><div class="容器"><a class="btn btn-navbar" data-toggle="collapse" data-target=".nav-collapse"><span class="icon-bar"></span><span class="icon-bar"></span><span class="icon-bar"></span></a><div class="nav-collapse"><ul class="nav"><li class="active"><a href="#">首页</a></li><li><a href="#">博客</a></li><li><a href="#">关于</a></li><li><a href="#">帮助</a></li><li class="dropdown" id="accountmenu"><a class="dropdown-toggle" data-toggle="dropdown" href="#">账户设置<b class="caret"></b></a><ul class="下拉菜单"><li><a href="#">登录</a></li><li class="item-148 下拉父项"><a href="/about/learn-more">了解更多&nbsp;<b class="caret-right"></b></a><ul class="下拉菜单"><li class="item-149"><a href="/about/learn-more/the-software">软件</a></li><li class="item-150"><a href="/about/learn-more/the-project">项目</a></li><li class="item-151"><a href="/about/learn-more/the-leadership">领导力</a></li><li class="item-152"><a href="/about/learn-more/open-source-matters">开源事项</a></li><li class="divider"></li><li><a href="#">注销</a></li><ul class="nav pull-right">

<!--/.nav-collapse -->

但这行不通.

解决方案

Bootstrap 2.3.x 及更高版本支持 dropdown-submenu..

<li><a href="#">注销</a></li>

Bootply.com 上的工作演示

I am trying to make a 3-level collapsing navbar menu for Bootstrap, but I can't open the third level.

This is the two level menu which I have:

<link href="https://stackpath.bootstrapcdn.com/twitter-bootstrap/2.3.2/css/bootstrap-combined.min.css" rel="stylesheet"/>
<div class="navbar navbar-fixed-top">
  <div class="navbar-inner">
    <div class="container">
      <a class="btn btn-navbar" data-toggle="collapse" data-target=".nav-collapse">
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </a>

      <div class="nav-collapse">
        <ul class="nav">
          <a class="brand" href="#">Present Ideas</a>
          <li class="active"><a href="#">Home</a></li>
          <li><a href="#">Blog</a></li>
          <li><a href="#">About</a></li>
          <li><a href="#">Help</a></li>
          <li class="dropdown" id="accountmenu">
            <a class="dropdown-toggle" data-toggle="dropdown" href="#">Account Settings<b class="caret"></b></a>
            <ul class="dropdown-menu">
              <li><a href="#">Login</a></li>
              <li><a href="#">Register</a></li>
              <li class="divider"></li>
              <li><a href="#">Logout</a></li>
            </ul>
          </li>
        </ul>
        <ul class="nav pull-right">

        </ul>
      </div>
      <!--/.nav-collapse -->
    </div>
  </div>
</div>

I thought something like this would work:

<link href="https://stackpath.bootstrapcdn.com/twitter-bootstrap/2.3.2/css/bootstrap-combined.min.css" rel="stylesheet"/>
<div class="navbar navbar-fixed-top">
  <div class="navbar-inner">
    <div class="container">
      <a class="btn btn-navbar" data-toggle="collapse" data-target=".nav-collapse">
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </a>

      <div class="nav-collapse">
        <ul class="nav">
          <li class="active"><a href="#">Home</a></li>
          <li><a href="#">Blog</a></li>
          <li><a href="#">About</a></li>
          <li><a href="#">Help</a></li>
          <li class="dropdown" id="accountmenu">
            <a class="dropdown-toggle" data-toggle="dropdown" href="#">Account Settings<b class="caret"></b></a>
            <ul class="dropdown-menu">
              <li><a href="#">Login</a></li>
              <li class="item-148 dropdown parent">
                <a href="/about/learn-more">Learn more&nbsp;<b class="caret-right"></b></a>
                <ul class="dropdown-menu">
                  <li class="item-149"><a href="/about/learn-more/the-software">The Software</a></li>
                  <li class="item-150"><a href="/about/learn-more/the-project">The Project</a></li>
                  <li class="item-151"><a href="/about/learn-more/the-leadership">The Leadership</a></li>
                  <li class="item-152"><a href="/about/learn-more/open-source-matters">Open Source Matters</a></li>
                </ul>
              </li>
              <li class="divider"></li>
              <li><a href="#">Logout</a></li>
            </ul>
          </li>
        </ul>
        <ul class="nav pull-right">

        </ul>
      </div>
      <!--/.nav-collapse -->
    </div>
  </div>
</div>

But that's not working.

解决方案

Bootstrap 2.3.x and later supports the dropdown-submenu..

<ul class="dropdown-menu">
            <li><a href="#">Login</a></li>
            <li class="dropdown-submenu">
                <a tabindex="-1" href="#">More options</a>
                <ul class="dropdown-menu">
                    <li><a tabindex="-1" href="#">Second level</a></li>
                    <li><a href="#">Second level</a></li>
                    <li><a href="#">Second level</a></li>
                </ul>
            </li>
            <li><a href="#">Logout</a></li>
</ul>

Working demo on Bootply.com

这篇关于如何在 Bootstrap 中制作 3 级折叠菜单?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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