Bootstrap 手风琴展开/折叠全部无法正常工作

这是打破这个的过程：

1. 单击乐谱
2. 单击全部展开/折叠
3. 单击乐谱
4. 单击全部展开/折叠
5. 再次单击全部展开/折叠

请注意，音乐符号不会重新打开，尽管您应该能够在函数中看到，逻辑表明所有面板都已关闭并且应该打开。为什么？我究竟做错了什么？

HTML:

<button class="btn btn-default btn-sm btn-exp" id="expandAllFormats">Expand/Collapse All</button>
<div class="panel-group checkbox-group" id="accordionFormat" role="tablist" aria-multiselectable="true">

<div class="panel panel-default">
<div class="panel-heading" role="tab">
<h4 class="panel-title">
<a id="accordionformatText" role="button" data-toggle="collapse" data-parent="#accordionFormat" href="#formatText">
<i class="fa fa-chevron-circle-right" aria-hidden="true"></i> Text
</a>
</h4>
</div>
<div id="formatText" class="panel-collapse collapse" role="tabpanel">
<div class="panel-body">ALPHA</div>
</div>
</div>

<div class="panel panel-default">
<div class="panel-heading" role="tab">
<h4 class="panel-title">
<a id="accordionformatArt" class="collapsed" role="button" data-toggle="collapse" data-parent="#accordionFormat" href="#formatArt">
<i class="fa fa-chevron-circle-right" aria-hidden="true"></i> Art
</a>
</h4>
</div>
<div id="formatArt" class="panel-collapse collapse" aria-expanded="false" role="tabpanel">
<div class="panel-body">BETA</div>
</div>
</div>

<div class="panel panel-default">
<div class="panel-heading" role="tab">
<h4 class="panel-title">
<a id="accordionformatAudio" class="collapsed" role="button" data-toggle="collapse" data-parent="#accordionFormat" href="#formatAudio">
<i class="fa fa-chevron-circle-right" aria-hidden="true"></i> Audio
</a>
</h4>
</div>
<div id="formatAudio" class="panel-collapse collapse" role="tabpanel">
<div class="panel-body">GAMMA</div>
</div>
</div>

<div class="panel panel-default">
<div class="panel-heading" role="tab">
<h4 class="panel-title">
<a id="accordionformatNotation" class="collapsed" role="button" data-toggle="collapse" data-parent="#accordionFormat" href="#formatNotation">
<i class="fa fa-chevron-circle-right" aria-hidden="true"></i> Music Notation
</a>
</h4>
</div>
<div id="formatNotation" class="panel-collapse collapse" role="tabpanel">
<div class="panel-body">DELTA</div>
</div>
</div>

<div class="panel panel-default">
<div class="panel-heading" role="tab">
<h4 class="panel-title">
<a id="accordionformatVideo" class="collapsed" role="button" data-toggle="collapse" data-parent="#accordionFormat" href="#formatVideo">
<i class="fa fa-chevron-circle-right" aria-hidden="true"></i> Video
</a>
</h4>
</div>
<div id="formatVideo" class="panel-collapse collapse" role="tabpanel">
<div class="panel-body">EPSILON</div>
</div>
</div>

<div class="panel panel-default">
<div class="panel-heading" role="tab">
<h4 class="panel-title">
<a id="accordionformatInteractive" class="collapsed" role="button" data-toggle="collapse" data-parent="#accordionFormat" href="#formatInteractive">
<i class="fa fa-chevron-circle-right" aria-hidden="true"></i> Digital Interactive
</a>
</h4>
</div>
<div id="formatInteractive" class="panel-collapse collapse" role="tabpanel">
<div class="panel-body">ZETA</div>
</div>
</div>
</div>

JS:

var toggleFormat = false;
$('#expandAllFormats').on('click', function(e) {
        e.preventDefault();
        console.log(toggleFormat);
        $("#accordionFormat .panel-collapse").each(function(index, value){
            if (toggleFormat){
                if($(this).hasClass('in')){
                    $(this).collapse('toggle');
                    console.log("This panel is open. it will be closed");
                } else {
                    console.log("This panel is closed. it will stay closed");
                }
            } else {
                if(!$(this).hasClass('in')){
                    $(this).collapse('toggle');
                    console.log("This panel is closed. it will be open");
                } else {
                    console.log("This panel is open. it will stay open");
                }
            }

        });
        toggleFormat = toggleFormat ? false : true;
    });

问题是这个状态all面板与状态不同任何单个面板是因为手风琴的工作方式data-parent。您的展开/折叠所有按钮处理程序需要完全覆盖正常的手风琴行为。

展开/折叠all点击处理程序must跟踪最后的状态（展开all或崩溃all），因为 Bootstrap Collapse 组件单独处理每个面板的状态（一次仅打开一个面板）。否则，将无法知道是否打开或关闭单独切换的面板。

$('#expandAllFormats').on('click', function () {

   if ($(this).data("lastState") === null || $(this).data("lastState") === 0) {

        // close all
        $('.collapse.in').collapse('hide');

        // next state will be open all
        $(this).data("lastState",1);
        $(this).text("Expand All");

    }
    else {

        // initial state...
        // override accordion behavior and open all
        $('.panel-collapse').removeData('bs.collapse')
        .collapse({parent:false, toggle:false})
        .collapse('show')
        .removeData('bs.collapse')
         // restore single panel behavior
        .collapse({parent:'#accordionFormat', toggle:false});

        // next state will be close all
        $(this).data("lastState",0);
        $(this).text("Collapse All");
    }

});

http://codeply.com/go/76Hl6s49rb http://codeply.com/go/76Hl6s49rb

OFC，另一种方法是简单地删除data-parent=属性并完全禁用手风琴行为。