css - 在小型设备中，如何使用 bootstrap4 将顶部 div 放在底部，将底部 div 放在顶部？

Question

<div class="container-fluid">
    <div class="row">
      <div class="col-lg-6 col-md-6 float-sm-right">
         <p>some content</p>
     </div>
     <div class="col-lg-6 col-md-6 float-sm-left">
       <img src="" alt=""/>
     </div>
   </div>
</div>

这是我试过但没有得到任何结果。请帮忙

Answer 1

这是一个基于您使用 Bootstrap 4 的代码的简单示例:

<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"></script>

<div class="container-fluid">
    <div class="row">
        <div class="col-md-6 order-last order-md-first">
            <p>Some content</p>
        </div>
        <div class="col-md-6 order-first order-md-last">
            An image
        </div>
    </div>
</div>

并使用 flexbox :

.container-fluid {
    width: 100%;
    padding-right: 15px;
    padding-left: 15px;
    margin-right: auto;
    margin-left: auto;
}

.row {
    display: -ms-flexbox;
    display: flex;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
}

.col-md-6 {
    position: relative;
    width: 100%;
}

.order-md-first {
    -ms-flex-order: 2;
    order: 2;
}
 
.order-md-last {
    -ms-flex-order: 1;
    order: 1;
}

@media (min-width: 768px) {
    .col-md-6 {
        -ms-flex: 0 0 50%;
        flex: 0 0 50%;
        max-width: 50%;
    }
  
    .order-md-first {
        -ms-flex-order: 1;
        order: 1;
    }
  
    .order-md-last {
        -ms-flex-order: 2;
        order: 2;
    }
}

<div class="container-fluid">
    <div class="row">
        <div class="col-md-6 order-md-first">
            <p>Some content</p>
        </div>
        <div class="col-md-6 order-md-last">
            <p>An image</p>
        </div>
    </div>
</div>