Bootstrap 3 - 展開摺疊圖標

我想在面板標題後加上&減去圖標。我怎樣才能做到這一點？

<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>

你能幫助我解決代碼，因爲我嘗試了不同的事情，我沒有到達那裏。

來源

2013-10-20 WebWebby

如果要添加圖標，請使用glyphicon。

第一個面板的示例。

<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>

來源

2013-10-21 12:11:25 Damathryx

Bootstrap 3 - 展開摺疊圖標

回答

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