Bootstrap 4 - col垂直对齐未按预期工作[重复]答案

【问题标题】：Bootstrap 4 - col vertical alignment not working as expected [duplicate]Bootstrap 4 - col垂直对齐未按预期工作[重复]
【发布时间】：2018-02-15 21:49:03
【问题描述】：

阅读 Bootstrap 文档，您可以访问 alignment examples section.

它告诉你可以使用 flexbox 对齐工具来vertically和horizontally将列对齐为 Bootstrap CSS 类 align-items-start、align-items-center 和 align-items-end 但是当我'正在尝试，内容未按预期垂直对齐，全高container，请参见以下代码：

html,
body {
  height: 100%;
}

.fill {
  min-height: 100%;
  height: auto !important;
  height: 100%;
  background-color: lightblue;
}
.col {
  border: 1px solid red;
}

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous">

<div class="container fill">
  <div class="row align-items-start">
    <div class="col text-center">
      align-items-start
    </div>
  </div>
  <div class="row align-items-center">
    <div class="col text-center">
      align-items-center
    </div>
  </div>
  <div class="row align-items-end">
    <div class="col text-center">
      align-items-end
    </div>
  </div>
</div>

<!-- jQuery first, then Tether, then Bootstrap JS. -->
<script src="https://code.jquery.com/jquery-3.1.1.slim.min.js" integrity="sha384-A7FZj7v+d/sdmMqp/nOQwliLvUsJfDHW+k9Omg/a/EheAdgtzNs3hpfag6Ed950n" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js" integrity="sha384-DztdAPBWPRXSA/3eYEEUWrWCy7G5KFbe8fFjk5JAIxUYHKkDx6Qin1DkWx51bBrb" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js" integrity="sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn" crossorigin="anonymous"></script>

我希望在垂直中间有align-items-center 内容，在container 底部有align-items-end。

我做错了什么或我误解了什么？

【问题讨论】：

标签： html css twitter-bootstrap

【解决方案1】：

为了垂直对齐flex-container 中的项目，您需要将height 赋予flex-container。

.row{
  min-height:100px;
}

html,
body {
  height: 100%;
}

.fill {
  min-height: 100%;
  height: auto !important;
  height: 100%;
  background-color: lightblue;
}
.col {
  border: 1px solid red;
}

.row{
  min-height:100px;
}

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous">

<div class="container fill">
  <div class="row align-items-start">
    <div class="col text-center">
      align-items-start
    </div>
  </div>
  <div class="row align-items-center">
    <div class="col text-center">
      align-items-center
    </div>
  </div>
  <div class="row align-items-end">
    <div class="col text-center">
      align-items-end
    </div>
  </div>
</div>

<!-- jQuery first, then Tether, then Bootstrap JS. -->
<script src="https://code.jquery.com/jquery-3.1.1.slim.min.js" integrity="sha384-A7FZj7v+d/sdmMqp/nOQwliLvUsJfDHW+k9Omg/a/EheAdgtzNs3hpfag6Ed950n" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js" integrity="sha384-DztdAPBWPRXSA/3eYEEUWrWCy7G5KFbe8fFjk5JAIxUYHKkDx6Qin1DkWx51bBrb" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js" integrity="sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn" crossorigin="anonymous"></script>

【讨论】：