Twitter Bootstrap：如何创建一个带有手风琴的下拉按钮？

Question

在 Twitter Bootstrap 中，我正在尝试创建一个按钮下拉菜单，其中包含一个手风琴。

目的是以简洁的形式呈现一长串项目（即避免用户长时间向下滚动）。

在下拉 div 中包含手风琴 div 的直接方法不起作用..：

<div class="dropdown">
    <a data-toggle="dropdown" href="#">Dropdown trigger</a>
    <div class="dropdown-menu" role="menu" aria-labelledby="dLabel" id="accordion">
    <h3>Unit 1</h3>
    <div>
      <p>item a</p>
      <p>item b</p>
    </div>
    <h3>Unit 2</h3>
    <div>
      <p>item c</p>
      <p>item d</p>
      <p>item e</p>
    </div>
  </div>            
</div>

任何想法如何实现这一点？

Answer 1

您可以使用以下方法在下拉菜单中插入手风琴：

• Bootstrap Dropdown component
• Bootstrap Collapse component

你需要添加几行 JS 来防止 Dropdown 事件破坏 Collapse 事件。

Working example on Bootply

<div class="dropdown dropdown-accordion" data-accordion="#accordion">
  <a data-toggle="dropdown" href="#" class="btn btn-primary">Dropdown trigger <span class="caret"></span></a>
  <ul class="dropdown-menu" role="menu" aria-labelledby="dLabel">
    <li>
      <div class="panel-group" id="accordion">
        <div class="panel panel-default">
          <div class="panel-heading">
            <h4 class="panel-title">
              <a data-toggle="collapse" data-parent="#accordion" href="#collapseOne">
                Unit 1
              </a>
            </h4>
          </div>
          <div id="collapseOne" class="panel-collapse collapse">
            <div class="panel-body">
              <a href="#">Item a</a><br>
              <a href="#">Item b</a>
            </div>
          </div>
        </div>
        <div class="panel panel-default">
          <div class="panel-heading">
            <h4 class="panel-title">
              <a data-toggle="collapse" data-parent="#accordion" href="#collapseTwo">
                Unit 2
              </a>
            </h4>
          </div>
          <div id="collapseTwo" class="panel-collapse collapse">
            <div class="panel-body">
              <a href="#">Item a</a><br>
              <a href="#">Item b</a><br>
              <a href="#">Item c</a>
            </div>
          </div>
        </div>
      </div>
    </li>
  </ul>
</div>

.dropdown-accordion .panel-heading {
  padding: 0;
}
.dropdown-accordion .panel-heading a {
  display: block;
  padding: 10px 15px;
}

// Collapse accordion every time dropdown is shown
$('.dropdown-accordion').on('show.bs.dropdown', function (event) {
  var accordion = $(this).find($(this).data('accordion'));
  accordion.find('.panel-collapse.in').collapse('hide');
});

// Prevent dropdown to be closed when we click on an accordion link
$('.dropdown-accordion').on('click', 'a[data-toggle="collapse"]', function (event) {
  event.preventDefault();
  event.stopPropagation();
  $($(this).data('parent')).find('.panel-collapse.in').collapse('hide');
  $($(this).attr('href')).collapse('show');
})