Bootstrap 4 中左右对齐模态页脚按钮

Question

Bootstrap 4 使用 flex-box 作为模态页脚。如果我想要两个按钮，一个在左边，一个在右边，我该如何让它正常工作？

下面的代码尝试将 div.row 与 col-sm-6 结合使用，但不起作用。

<script src="https://code.jquery.com/jquery-3.1.1.slim.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" rel="stylesheet"/>

<!-- Button trigger modal -->
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#myModal">
  Launch demo modal
</button>

<!-- Modal -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title" id="exampleModalLabel">Modal title</h5>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
      </div>
      <div class="modal-body">
        ...
      </div>
      <div class="modal-footer">
      <div class="row">
        <div class="col-sm-6 text-left">
        <button type="button" class="btn btn-primary">Save changes</button>
        </div>
        <div class="col-sm-6 text-right">
        <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
        </div>
      </div>
      </div>
    </div>
  </div>
</div>

Answer 1

既然 modal-footer 是 Bootstrap 4 中的 "display:flex"，那么使用自动边距将是最简单的。使用左侧按钮上的 mr-auto。

<div class="modal-footer">
     <button type="button" class="btn btn-primary mr-auto">Save changes</button>
     <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
</div>

Demo

另见：Left align and right align within div in Bootstrap

跟进评论 "What if I need the button on the right to occupy all the space left?" - 使用 btn-block class:

<div class="modal-footer">
     <button type="button" class="btn btn-primary text-nowrap">Save changes</button>
     <button type="button" class="btn btn-secondary btn-block ml-1" data-dismiss="modal">Close</button>
</div>

Answer 2

它在 IE 中工作的唯一方法是使用 w-100。 mx-auto 和 mr 以及 ml-auto 似乎都溢出了包含元素的按钮。

<div class="modal-footer">
  <div class="w-100">
    <button type="button" class="btn btn-default">Cancel</button>
    <button type="button" class="btn btn-primary float-right">Save</button>
  </div>
</div>

Answer 3

这很简单，对我有帮助

 <div class="modal-footer">
 <button id="pagePrintBtn" type="button" class="btn btn-primary" style= "float: left;">Print</button>
 </div>

Answer 4

  <div class="modal-footer justify-content-start">
                    <input type="hidden" value="" name="">
                    <button id="pagePrintBtn" type="button" class="btn btn-primary">Print</button>
                    <button type="button" class="btn btn-secondary ml-auto" data-dismiss="modal">Delete</button>
                    <button type="button" class="btn btn-primary" id=asd>Save</button>
                </div>

Answer 5

modal-footer 是 display:flex;。因此，对齐其元素（例如按钮）的更好方法是使用弹性规则。 Bootstrap 4 提供了新的实用程序类来修改那些弹性规则（例如 .justify-content-[modifier]）。所以我认为更好的选择应该是：

<div class="modal-footer justify-content-between">
  <button type="button" class="btn btn-primary">Save changes</button>
  <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
</div>

<script src="https://code.jquery.com/jquery-3.1.1.slim.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" rel="stylesheet"/>

<!-- Button trigger modal -->
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#myModal">
  Launch demo modal
</button>

<!-- Modal -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title" id="exampleModalLabel">Modal title</h5>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
      </div>
      <div class="modal-body">
        ...
      </div>
      <div class="modal-footer justify-content-between">
        <button type="button" class="btn btn-primary">Save changes</button>
        <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
      </div>
    </div>
  </div>
</div>

Answer 6

对于Bootstrap 4

我们使用 Spacing，Bootstrap 包括范围广泛的缩写和填充响应边距实用程序类来修改元素的外观。类的命名格式为 {属性}{sides}-{size} for xs 和 {属性}{sides}-{breakpoint}-{size} for sm, md 、lg 和 xl。

更多信息在这里：https://getbootstrap.com/docs/4.1/utilities/spacing/

<!--Footer-->
<div class="modal-footer">
  <button type="submit" class="btn btn-primary ml-auto">Enviar</button>
  <button type="button" class="btn btn-danger mr-auto" data-dismiss="modal">Cerrar</button>
</div>

Answer 7

对于 IE，您可以对父元素使用 .justify-content-between 帮助程序 class 形式 bootstrap。在本例中为 .modal-footer.

例如：

<div class="modal-footer justify-content-between">
     <button type="button" class="btn btn-primary">Save changes</button>
     <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
</div>

Answer 8

对于想要 3 个按钮的任何人，例如右侧 2 个和左侧 1 个：

<div class="modal-footer justify-content-between">                    
   <button type="submit" class="btn btn-danger">Delete</button>                                    
   <div>
       <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
       <button type="submit" class="btn btn-primary">Save changes</button>
   </div>  
</div>

Answer 9

完全同意@Zim 和@jmboiton

如果这两个这些方法一起使用，它解决了每个人的问题（包括 IE 用户：P）

总体最佳解决方案是像这样组合 .justify-content-between 和 .mr-auto 类：

<div class="modal-footer justify-content-between">
  <button type="button" class="btn btn-secondary mr-auto" type="button">Left Button</button>
  <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
  <button type="button" class="btn btn-primary">Save changes</button>
</div>

<script src="https://code.jquery.com/jquery-3.1.1.slim.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" rel="stylesheet"/>

<!-- Button trigger modal -->
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#myModal">
  Launch demo modal
</button>

<!-- Modal -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title" id="exampleModalLabel">Modal title</h5>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
      </div>
      <div class="modal-body">
        ...
      </div>
      <div class="modal-footer justify-content-between">
          <button type="button" class="btn btn-secondary mr-auto" type="button">Left Button</button>
          <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
          <button type="button" class="btn btn-primary">Save changes</button>
      </div>
    </div>
  </div>
</div>

Answer 10

这对我有用

 <div class="modal-footer">
     <button type="button" class="btn btn-primary d-flex flex-grow-1">Save changes</button>
     <button type="button" class="btn btn-secondary d-flex flex-grow-1" data-dismiss="modal">Close</button>
</div>

Answer 11

`<div class="modal-footer justify-content-between">
    <button type="button" class="btn btn-primary">Save changes</button>
    <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
  </div>`.

您可以创建一个 div 标签 (<div class="col-md-12 text-right></div>) 并将您的按钮标签放在该 div 部分中。这将使按钮居中。如果您想移动任何其他位置和 css 样式 float: left or right 到我们新的 div 标签中的 class。

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