为什么卡片中的div不会在Bootstrap中达到全高？

Question

试图设置一个div来填满整个列，但没有运气。这是我目前的代码，任何想法？

<div class="card">
  <div class="row">
    <div class="col-md-4 my-auto">
      <div style="text-align: center;background-color:rgba(0,0,0,.03);" class="h-100">Some date</div>
    </div>
    <div class="col-md-8 px-3">
      <div class="card-body">
        <h4 class="card-title">Some event</h4>
        <p class="card-text">Some description</p>
        <a href="#" class="btn btn-primary">More info</a>
      </div>
    </div>
  </div>
</div>

最终结果如下：

我已经尝试在text-align div上将高度设置为100％，但没有运气。

Answer 1

一种可能的解决方案是从my-auto元素中删除col-4并用以下代码替换目标div（具有text-align的那个）：

 <div style="background-color:rgba(0,0,0,.03);" class="d-flex h-100 align-items-center justify-content-center">
   Some date
 </div>

例：

<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>

<div class="card">
  <div class="row">

    <div class="col-md-4">
      <div style="background-color:rgba(0,0,0,.03);" class="d-flex h-100 align-items-center justify-content-center">
        Some date
      </div>
    </div>

    <div class="col-md-8 px-3">
      <div class="card-body">
        <h4 class="card-title">Some event</h4>
        <p class="card-text">Some description</p>
        <a href="#" class="btn btn-primary">More info</a>
      </div>
    </div>

  </div>
</div>

但是，我只是将自定义background-color添加到col-4元素并将其内容放在下一个示例中（删除内部div）。我相信这种方式更干净：

.custom-bg {
  background-color: rgba(0,0,0,.03);
}

<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>

<div class="card">
  <div class="row">

    <div class="col-md-4 custom-bg d-flex justify-content-center align-items-center">
        Some date
    </div>

    <div class="col-md-8 px-3">
      <div class="card-body">
        <h4 class="card-title">Some event</h4>
        <p class="card-text">Some description</p>
        <a href="#" class="btn btn-primary">More info</a>
      </div>
    </div>

  </div>
</div>

Answer 2

您应该使用d-flex进行显示：在列内容上使用flex，然后使用flexbox utils使其居中...

<div class="card">
  <div class="row">
    <div class="col-md-4">
      <div style="text-align: center;background-color:rgba(0,0,0,.03);" class="h-100 d-flex flex-column justify-content-center">
          Some date
      </div>
    </div>
    <div class="col-md-8 px-3">
      <div class="card-body">
        <h4 class="card-title">Some event</h4>
        <p class="card-text">Some description</p>
        <a href="#" class="btn btn-primary">More info</a>
      </div>
    </div>
  </div>
</div>

https://www.codeply.com/go/bfj3rHZ3q8