Bootstrap：如何在中心對齊按鈕組（垂直）

Question

在以下代碼中：

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script> <!-- Latest compiled and minified CSS --> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous"> <!-- Optional theme --> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap-theme.min.css" integrity="sha384-fLW2N01lMqjakBkx3l/M9EahuwpSfeNvV63J5ezn3uZzapT0u7EYsXMjQV+0En5r" crossorigin="anonymous"> <!-- Latest compiled and minified JavaScript --> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js" integrity="sha384-0mSbJDEHialfmuBBQP6A4Qrprq5OVfW37PRR3j5ELqxss1yVqOtnepnHVP9aJ7xS" crossorigin="anonymous"></script> <div class="container"> <div class="row"> <div class="col-lg-12"> <div class="panel panel-primary"> <div class="panel-heading"><h2>Element Selection</h2></div> <div class="panel-body"> <div class="row"> <div class="col-lg-5"> <div class="form-group"> <h3><span class="label label-info">Element Segment</span></h3> <textarea class="form-control" rows="8"></textarea> </div> </div> <div class="col-lg-2 text-center" > <div class="btn-group-vertical"> <button type="button" class="btn btn-primary">>></button> <button type="button" class="btn btn-primary"><<</button> <button type="button" class="btn btn-primary">ALL>></button> <button type="button" class="btn btn-primary"><< ALL</button> </div> </div> <div class="col-lg-5"> <div class="form-group"> <h3><span class="label label-success">Element Segment</span></h3> <textarea class="form-control" rows="8"></textarea> </div> </div> </div> </div> </div> </div> </div> </div> 

現在結果如下：

所以我可以將按鈕組垂直放在中心位置。 我搜索並嘗試了vertical-align: middle ，但它對我不起作用。

Answer 1

您可以將Flexbox與媒體查詢DEMO一起使用 （ 1200px用於.col-lg- ）

@media(min-width: 1200px) {
  .flex-row {
    display: flex;
    align-items: center;
  }
}

Answer 2

答案已經由@Nenad Vracar發布，但您也可以試試這個

 .flex-row {
    display: flex;
    align-items: center;
  }

在這里演示