此问题是相关评论的连续性 How to add plus minus symbol to a bootstrap accordion
如何为嵌套的bootstrap手风琴添加正负符号并使其正常工作？目前，他们没有像预期的那样切换。
这就是我尝试过的：http://jsfiddle.net/4t1qs0uv/2/
HTML：
<div class="panel-group" id="accordion1">
<div class="panel panel-default">
<div class="panel-heading">
<h4 class="panel-title">
<a data-toggle="collapse" data-parent="#accordion" href="#livingroom-10" class="collapsed">Living Room</a>
</h4>
</div>
<div id="livingroom-10" class="panel-collapse collapse" style="height: 0px;">
<div class="panel-body">
<div class="panel-group" id="accordion2">
<div class="panel panel-default">
<div class="panel-heading">
<h4 class="panel-title">
<a data-toggle="collapse" data-parent="#accordion" href="#add101">
Air Condition
</a>
</h4>
</div>
<div id="add101" class="panel-collapse collapse">
<div class="panel-body">
<form class="form-inline" role="form">
<div class="form-group">
<label for="usageperday">Usage Per Day</label><br>
<input type="text" class="form-control" name="usageperday-1.0.1" placeholder="Usage Per Day" value="8">
</div>
<div class="form-group">
<label for="numbermonth">Number of days used per month</label><br>
<input type="text" class="form-control" name="numbermonth-1.0.1" placeholder="Number of days used per month" value="30">
</div>
<div class="form-group">
<label for="watts">Watts</label><br>
<input type="text" class="form-control" name="watts-1.0.1" placeholder="Watts" value="1500">
</div>
</form>
</div>
</div>
</div>
</div>
<div class="panel-group" id="accordion2">
<div class="panel panel-default">
<div class="panel-heading">
<h4 class="panel-title">
<a data-toggle="collapse" data-parent="#accordion" href="#add102">
Fan
</a>
</h4>
</div>
<div id="add102" class="panel-collapse collapse in">
<div class="panel-body">
<form class="form-inline" role="form">
<div class="form-group">
<label for="usageperday">Usage Per Day</label><br>
<input type="text" class="form-control" name="usageperday-1.0.2" placeholder="Usage Per Day" value="8">
</div>
<div class="form-group">
<label for="numbermonth">Number of days used per month</label><br>
<input type="text" class="form-control" name="numbermonth-1.0.2" placeholder="Number of days used per month" value="30">
</div>
<div class="form-group">
<label for="watts">Watts</label><br>
<input type="text" class="form-control" name="watts-1.0.2" placeholder="Watts" value="90">
</div>
</form>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="panel panel-default">
<div class="panel-heading">
<h4 class="panel-title">
<a data-toggle="collapse" data-parent="#accordion" href="#bathroom-20" class="collapsed">
Bathroom
</a>
</h4>
</div>
<div id="bathroom-20" class="panel-collapse collapse" style="height: 0px;">
<div class="panel-body">
<div class="panel-group" id="accordion2">
<div class="panel panel-default">
<div class="panel-heading">
<h4 class="panel-title">
<a data-toggle="collapse" data-parent="#accordion" href="#add2029">
Router
</a>
</h4>
</div>
<div id="add2029" class="panel-collapse collapse">
<div class="panel-body">
<form class="form-inline" role="form">
<div class="form-group">
<label for="usageperday">Usage Per Day</label><br>
<input type="text" class="form-control" name="usageperday-2.0.29" placeholder="Usage Per Day" value="24">
</div>
<div class="form-group">
<label for="numbermonth">Number of days used per month</label><br>
<input type="text" class="form-control" name="numbermonth-2.0.29" placeholder="Number of days used per month" value="30">
</div>
<div class="form-group">
<label for="watts">Watts</label><br>
<input type="text" class="form-control" name="watts-2.0.29" placeholder="Watts" value="10">
</div>
</form>
</div>
</div>
</div>
</div>
<div class="panel-group" id="accordion2">
<div class="panel panel-default">
<div class="panel-heading">
<h4 class="panel-title">
<a data-toggle="collapse" data-parent="#accordion" href="#add2030">
Scanner
</a>
</h4>
</div>
<div id="add2030" class="panel-collapse collapse">
<div class="panel-body">
<form class="form-inline" role="form">
<div class="form-group">
<label for="usageperday">Usage Per Day</label><br>
<input type="text" class="form-control" name="usageperday-2.0.30" placeholder="Usage Per Day" value="0.1">
</div>
<div class="form-group">
<label for="numbermonth">Number of days used per month</label><br>
<input type="text" class="form-control" name="numbermonth-2.0.30" placeholder="Number of days used per month" value="2">
</div>
<div class="form-group">
<label for="watts">Watts</label><br>
<input type="text" class="form-control" name="watts-2.0.30" placeholder="Watts" value="20">
</div>
</form>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
JavaScript的：
jQuery(function ($) {
var $active = $('#accordion1 .panel-collapse.in').prev().addClass('active');
$active.find('a').append('<span class="glyphicon glyphicon-minus pull-right"></span>');
$('#accordion1 .panel-heading').not($active).find('a').prepend('<span class="glyphicon glyphicon-plus pull-right"></span>');
$('#accordion1').on('show.bs.collapse', function (e) {
$('#accordion1 .panel-heading.active').removeClass('active').find('.glyphicon').toggleClass('glyphicon-plus glyphicon-minus');
$(e.target).prev().addClass('active').find('.glyphicon').toggleClass('glyphicon-plus glyphicon-minus');
});
$('#accordion1').on('hide.bs.collapse', function (e) {
$(e.target).prev().removeClass('active').find('.glyphicon').removeClass('glyphicon-minus').addClass('glyphicon-plus');
});
var $active2 = $('#accordion2 .panel-collapse.in').prev().addClass('active');
$active2.find('a').append('<span class="glyphicon glyphicon-minus pull-right"></span>');
$('#accordion2 .panel-heading').not($active2).find('a').prepend('<span class="glyphicon glyphicon-plus pull-right"></span>');
$('#accordion2').on('show.bs.collapse', function (e) {
$('#accordion2 .panel-heading.active').removeClass('active').find('.glyphicon').toggleClass('glyphicon-plus glyphicon-minus');
$(e.target).prev().addClass('active').find('.glyphicon').toggleClass('glyphicon-plus glyphicon-minus');
});
$('#accordion2').on('hide.bs.collapse', function (e) {
$(e.target).prev().removeClass('active').find('.glyphicon').removeClass('glyphicon-minus').addClass('glyphicon-plus');
});
});
答案 0 :(得分：13)
如果使用正确的样式和唯一ID实现面板组，则可以使用CSS在嵌套的toggle上添加指示符。不需要新的JQuery：
<强> CSS：
.panel-group .panel-heading a:after {
content: '-';
position: absolute;
right: 20px;
top:5px;
}
.panel-group .panel-heading a.collapsed:after {
content: '+';
}
<强> HTML：
<div class="container">
<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">
Collapsible Group Item #1
</a>
</h4>
</div><!--/.panel-heading -->
<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><!--/.panel-body -->
</div><!--/.panel-collapse -->
</div><!-- /.panel -->
<div class="panel panel-default">
<div class="panel-heading">
<h4 class="panel-title">
<a class="collapsed" data-toggle="collapse" data-parent="#accordion" href="#collapseTwo">
Collapsible Group Item #2
</a>
</h4>
</div><!--/.panel-heading -->
<div id="collapseTwo" class="panel-collapse collapse">
<div class="panel-body">
<!-- nested -->
<div class="panel-group" id="nested">
<div class="panel panel-default">
<div class="panel-heading">
<h4 class="panel-title">
<a data-toggle="collapse" data-parent="#nested" href="#nested-collapseOne">
Collapsible Group Item #1
</a>
</h4>
</div><!--/.panel-heading -->
<div id="nested-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><!--/.panel-body -->
</div><!--/.panel-collapse -->
</div><!-- /.panel -->
<div class="panel panel-default">
<div class="panel-heading">
<h4 class="panel-title">
<a class="collapsed" data-toggle="collapse" data-parent="#nested" href="#nested-collapseTwo">
Collapsible Group Item #2
</a>
</h4>
</div><!--/.panel-heading -->
<div id="nested-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><!--/.panel-body -->
</div><!--/.panel-collapse -->
</div><!-- /.panel -->
<div class="panel panel-default">
<div class="panel-heading">
<h4 class="panel-title">
<a class="collapsed" data-toggle="collapse" data-parent="#nested" href="#nested-collapseThree">
Collapsible Group Item #3
</a>
</h4>
</div><!--/.panel-heading -->
<div id="nested-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><!--/.panel-body -->
</div><!--/.panel-collapse -->
</div><!-- /.panel -->
</div><!-- /.panel-group -->
<!-- nested -->
</div><!--/.panel-body -->
</div><!--/.panel-collapse -->
</div><!-- /.panel -->
<div class="panel panel-default">
<div class="panel-heading">
<h4 class="panel-title">
<a class="collapsed" data-toggle="collapse" data-parent="#accordion" href="#collapseThree">
Collapsible Group Item #3
</a>
</h4>
</div><!--/.panel-heading -->
<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><!--/.panel-body -->
</div><!--/.panel-collapse -->
</div><!-- /.panel -->
</div><!-- /.panel-group -->
</div><!-- /.container -->
答案 1 :(得分：0)
与Font Awesome Icon（fa-plus和fa-minus）相同的解决方案，你也可以使用fa-chevron-down和fa-chevron-up。
.panel-group .panel-heading a:before {
font-family: fontAwesome;
position: absolute;
color: #fff;
font-size: 20px;
top: 8px;
right: 10px;
}
.panel-group .panel-heading a:before {
content: "\f068";
}
.panel-group .panel-heading a.collapsed:before {
content: "\f067";
}
内容中的unicode：＆＃34; \ unicode＆＃34;可以在fontAwesome中的每个图标下找到，或者转到项目中的font-awesome.css。 http://fortawesome.github.io/Font-Awesome/icon/chevron-down/
<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">
Collapsible Group Item #1
</a>
</h4>
</div><!--/.panel-heading -->
<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><!--/.panel-body -->
</div><!--/.panel-collapse -->
</div><!-- /.panel -->
<div class="panel panel-default">
<div class="panel-heading">
<h4 class="panel-title">
<a class="collapsed" data-toggle="collapse" data-parent="#accordion" href="#collapseTwo">
Collapsible Group Item #2
</a>
</h4>
</div><!--/.panel-heading -->
<div id="collapseTwo" class="panel-collapse collapse">
<div class="panel-body">
<!-- nested -->
<div class="panel-group" id="nested">
<div class="panel panel-default">
<div class="panel-heading">
<h4 class="panel-title">
<a data-toggle="collapse" data-parent="#nested" href="#nested-collapseOne">
Collapsible Group Item #1
</a>
</h4>
</div><!--/.panel-heading -->
<div id="nested-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><!--/.panel-body -->
</div><!--/.panel-collapse -->
</div><!-- /.panel -->
<div class="panel panel-default">
<div class="panel-heading">
<h4 class="panel-title">
<a class="collapsed" data-toggle="collapse" data-parent="#nested" href="#nested-collapseTwo">
Collapsible Group Item #2
</a>
</h4>
</div><!--/.panel-heading -->
<div id="nested-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><!--/.panel-body -->
</div><!--/.panel-collapse -->
</div><!-- /.panel -->
<div class="panel panel-default">
<div class="panel-heading">
<h4 class="panel-title">
<a class="collapsed" data-toggle="collapse" data-parent="#nested" href="#nested-collapseThree">
Collapsible Group Item #3
</a>
</h4>
</div><!--/.panel-heading -->
<div id="nested-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><!--/.panel-body -->
</div><!--/.panel-collapse -->
</div><!-- /.panel -->
</div><!-- /.panel-group -->
</div><!--/.panel-body -->
</div><!--/.panel-collapse -->
</div><!-- /.panel -->
<div class="panel panel-default">
<div class="panel-heading">
<h4 class="panel-title">
<a class="collapsed" data-toggle="collapse" data-parent="#accordion" href="#collapseThree">
Collapsible Group Item #3
</a>
</h4>
</div><!--/.panel-heading -->
<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><!--/.panel-body -->
</div><!--/.panel-collapse -->
</div><!-- /.panel -->
</div><!-- /.panel-group -->