Html 带箭头的 Bootstrap 手风琴
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时间：2020-08-29 13:27:01 来源:igfitidea点击:
Bootstrap accordion with arrows
提问by Christian
I have a simple question regarding the Bootstrap accordion.
我有一个关于 Bootstrap 手风琴的简单问题。
I created an accordion witch is clickable on the header to expand. This works well but my problem is that the arrows are not show in the header.
我创建了一个可在标题上单击以展开的手风琴女巫。这很好用，但我的问题是箭头没有显示在标题中。
.panel-heading [data-toggle="collapse"]:after {
font-family: 'Glyphicons Halflings';
content: "\e072";
/* "play" icon */
float: right;
color: #b0c5d8;
font-size: 18px;
line-height: 22px;
/* rotate "play" icon from > (right arrow) to down arrow */
-webkit-transform: rotate(-90deg);
-moz-transform: rotate(-90deg);
-ms-transform: rotate(-90deg);
-o-transform: rotate(-90deg);
transform: rotate(-90deg);
}
.panel-heading [data-toggle="collapse"].collapsed:after {
/* rotate "play" icon from > (right arrow) to ^ (up arrow) */
-webkit-transform: rotate(90deg);
-moz-transform: rotate(90deg);
-ms-transform: rotate(90deg);
-o-transform: rotate(90deg);
transform: rotate(90deg);
}<script src="http://netdna.bootstrapcdn.com/bootstrap/3.0.2/js/bootstrap.min.js"></script>
<link href="http://netdna.bootstrapcdn.com/bootstrap/3.0.2/css/bootstrap.min.css" rel="stylesheet"/>
<!-- Accordion START -->
<div class="panel-group" id="accordion">
<div class="panel panel-default">
<div class="panel-heading accordion-toggle collapsed" data-toggle="collapse" data-parent="#accordion" data-target="#collapseOne">
<h4 class="panel-title">Test1</h4>
</div>
<div id="collapseOne" class="panel-collapse collapse">
<div class="panel-body">
<p>sadfsadfsdaf sadf</p>
</div>
</div>
</div>
<div class="panel panel-default">
<div class="panel-heading accordion-toggle collapsed" data-toggle="collapse" data-parent="#accordion" data-target="#collapseTwo">
<h4 class="panel-title">Test2</h4>
</div>
<div id="collapseTwo" class="panel-collapse collapse">
<div class="panel-body">
<p>
Bla bla bla
</p>
</div>
</div>
</div>
</div>
<!-- Accordion END -->回答by Mohammad Usman
Problem is in space between selectors:
问题在于选择器之间的空间：
.panel-heading [data-toggle="collapse"]:after
^------- // remove this space to make this selector work
Now you are selecting all elements having data-toggleattribute which are descendants of .panel-heading. It should be:
现在您正在选择所有具有data-toggle属性的元素，这些元素是.panel-heading. 它应该是：
.panel-heading[data-toggle="collapse"]:after
.panel-heading {
position: relative;
}
.panel-heading[data-toggle="collapse"]:after {
font-family: 'Glyphicons Halflings';
content: "\e072"; /* "play" icon */
position: absolute;
color: #b0c5d8;
font-size: 18px;
line-height: 22px;
right: 20px;
top: calc(50% - 10px);
/* rotate "play" icon from > (right arrow) to down arrow */
-webkit-transform: rotate(-90deg);
-moz-transform: rotate(-90deg);
-ms-transform: rotate(-90deg);
-o-transform: rotate(-90deg);
transform: rotate(-90deg);
}
.panel-heading[data-toggle="collapse"].collapsed:after {
/* rotate "play" icon from > (right arrow) to ^ (up arrow) */
-webkit-transform: rotate(90deg);
-moz-transform: rotate(90deg);
-ms-transform: rotate(90deg);
-o-transform: rotate(90deg);
transform: rotate(90deg);
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/>
<!-- Accordion START -->
<div class="panel-group" id="accordion">
<div class="panel panel-default">
<div class="panel-heading accordion-toggle collapsed" data-toggle="collapse" data-parent="#accordion" data-target="#collapseOne">
<h4 class="panel-title">Test1</h4>
</div>
<div id="collapseOne" class="panel-collapse collapse">
<div class="panel-body">
<p>sadfsadfsdaf sadf</p>
</div>
</div>
</div>
<div class="panel panel-default">
<div class="panel-heading accordion-toggle collapsed" data-toggle="collapse" data-parent="#accordion" data-target="#collapseTwo">
<h4 class="panel-title">Test2</h4>
</div>
<div id="collapseTwo" class="panel-collapse collapse">
<div class="panel-body">
<p>
Bla bla bla
</p>
</div>
</div>
</div>
</div>
<!-- Accordion END -->