Bootstrap 3 - 展开折叠图标

我想在面板标题后加上&减去图标。我怎样才能做到这一点？

<div class="panel-group" id="accordion"> 
    <div class="panel panel-default"> 
    <div class="panel-heading"> 
     <h4 class="panel-title"> 
     <a class="accordion-toggle" data-toggle="collapse" data-parent="#accordion" href="#collapseOne"> 
      Collapsible Group Item #1 
     </a> 
     </h4> 
    </div> 
    <div id="collapseOne" class="panel-collapse collapse in"> 
     <div class="panel-body"> 
     Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS. 
     </div> 
    </div> 
    </div> 
    <div class="panel panel-default"> 
    <div class="panel-heading"> 
     <h4 class="panel-title"> 
     <a class="accordion-toggle" data-toggle="collapse" data-parent="#accordion" href="#collapseTwo"> 
      Collapsible Group Item #2 
     </a> 
     </h4> 
    </div> 
    <div id="collapseTwo" class="panel-collapse collapse"> 
     <div class="panel-body"> 
     Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS. 
     </div> 
    </div> 
    </div> 
    <div class="panel panel-default"> 
    <div class="panel-heading"> 
     <h4 class="panel-title"> 
     <a class="accordion-toggle" data-toggle="collapse" data-parent="#accordion" href="#collapseThree"> 
      Collapsible Group Item #3 
     </a> 
     </h4> 
    </div> 
    <div id="collapseThree" class="panel-collapse collapse"> 
     <div class="panel-body"> 
     Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS. 
     </div> 
    </div> 
    </div> 
</div>

你能帮助我解决代码，因为我尝试了不同的事情，我没有到达那里。

来源

2013-10-20 WebWebby

如果要添加图标，请使用glyphicon。

第一个面板的示例。

<h4 class="panel-title"> 

<a class="accordion-toggle" data-toggle="collapse" data-parent="#accordion" href="#collapseOne"> 
Collapsible Group Item #1 
<span class="pull-right"> 
<i class="glyphicon glyphicon-plus">/</i><i class="glyphicon glyphicon-minus"></i> 
</span></a> 

</h4>

来源

2013-10-21 12:11:25 Damathryx

Bootstrap 3 - 展开折叠图标

回答

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