我有一个箭头图像在我的Bootstrap 4手风琴卡的每个标题。我的目标是让它们在卡的右边缘（但仍在卡的边框内）上彼此对齐。到目前为止，我试过的每件事要么把箭头从卡片中推出，要么把它们放到头部的其余部分下面。
<div class="card">
<h3> FAQ </h3>
<div class="card-header" id="headingOne">
<h5 class="mb-0">
<button class="btn" data-toggle="collapse" data-target="#collapseOne" aria-expanded="true" aria-controls="collapseOne">
How many team members can I invite? <img src="images/icon-arrow-down.svg" class="arrow">
</button>
</h5>
</div>
<div id="collapseOne" class="collapse show" aria-labelledby="headingOne" data-parent="#accordion">
<div class="card-body">
You can invite up to 2 additional users on the Free plan. There is no limit on
team members for the Premium plan.
</div>
</div>
</div>
#accordion{
width:30%;
float: right;
position:relative;
top: 300px;
right: 900px;
align-content: center;
font-family: 'Kumbh Sans', sans-serif;
}
.card-header{
background-color: white;
clear: both;
}
.arrow{
}
button{
position:relative;
left:-32px;
}
我生成了一个示例，以获得与Bootstrap 4相同的行为，并将箭头标记的内部。之后，float:right属性将元素拉到右边。
null
.xl {
width:100%;
border: solid 1px #333;
}
#accordion{
margin-left:30px;
width:60%;
}
.arrow{
width:36px;
height: auto;
float:right;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet"/>
<div class='xl'>
<h3>Some Header</h3>
<div id="accordion">
<div class="card">
<div class="card-header" id="headingOne">
<h5 class="mb-0">
<button class="btn btn-link" data-toggle="collapse" data-target="#collapseOne" aria-expanded="true" aria-controls="collapseOne">Collapsible Group Item #1
</button>
<img src='https://upload.wikimedia.org/wikipedia/en/f/f1/Down_Arrow_Icon.png' class='arrow'>
</h5>
</div>
<div id="collapseOne" class="collapse show" aria-labelledby="headingOne" data-parent="#accordion">
<div class="card-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="card">
<div class="card-header" id="headingTwo">
<h5 class="mb-0">
<button class="btn btn-link collapsed" data-toggle="collapse" data-target="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo">
Collapsible Group Item #2
</button>
<img src='https://upload.wikimedia.org/wikipedia/en/f/f1/Down_Arrow_Icon.png' class='arrow'>
</h5>
</div>
<div id="collapseTwo" class="collapse" aria-labelledby="headingTwo" data-parent="#accordion">
<div class="card-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="card">
<div class="card-header" id="headingThree">
<h5 class="mb-0">
<button class="btn btn-link collapsed" data-toggle="collapse" data-target="#collapseThree" aria-expanded="false" aria-controls="collapseThree">
Collapsible Group Item #3
</button>
<img src='https://upload.wikimedia.org/wikipedia/en/f/f1/Down_Arrow_Icon.png' class='arrow'>
</h5>
</div>
<div id="collapseThree" class="collapse" aria-labelledby="headingThree" data-parent="#accordion">
<div class="card-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>
</div>
您可以通过将元素变成一个flex行，并使用justify-content属性和space-between来实现这一点。
示例
HTML:
<div class="card">
<h3> FAQ </h3>
<div class="card-header" id="headingOne">
<h5 class="mb-0">
<button class="btn" data-toggle="collapse" data-target="#collapseOne" aria-expanded="true" aria-controls="collapseOne">
How many team members can I invite?
</button>
v
</h5>
</div>
<div id="collapseOne" class="collapse show" aria-labelledby="headingOne" data-parent="#accordion">
<div class="card-body">
You can invite up to 2 additional users on the Free plan. There is no limit on
team members for the Premium plan.
</div>
</div>
</div>
CSS:
#accordion {
width:30%;
float: right;
position:relative;
top: 300px;
right: 900px;
align-content: center;
font-family: 'Kumbh Sans', sans-serif;
}
.card-header {
background-color: white;
clear: both;
}
.card-header h5 {
display: flex;
flex-direction: row;
flex-wrap: wrap;
justify-content: space-between;
}
button{
position:relative;
left:-32px;
}
我正在使用v而不是您的图像来可视化效果，但结果是一样的。
代码段:
null
#accordion {
width:30%;
float: right;
position:relative;
top: 300px;
right: 900px;
align-content: center;
font-family: 'Kumbh Sans', sans-serif;
}
.card-header {
background-color: white;
clear: both;
}
.card-header h5 {
display: flex;
flex-direction: row;
flex-wrap: wrap;
justify-content: space-between;
}
button{
position:relative;
left:-32px;
}<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.5.0/css/bootstrap.min.css" rel="stylesheet"/>
<div class="card">
<h3> FAQ </h3>
<div class="card-header" id="headingOne">
<h5 class="mb-0">
<button class="btn" data-toggle="collapse" data-target="#collapseOne" aria-expanded="true" aria-controls="collapseOne">
How many team members can I invite?
</button>
v
</h5>
</div>
<div id="collapseOne" class="collapse show" aria-labelledby="headingOne" data-parent="#accordion">
<div class="card-body">
You can invite up to 2 additional users on the Free plan. There is no limit on
team members for the Premium plan.
</div>
</div>
</div>