我正在使用Bootstrap。如何让三根柱子都一样高呢?

下面是问题的截图。我希望蓝色和红色的列和黄色的列一样高。

代码如下:

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/> <div class="container-fluid"> <div class="row"> <div class="col-xs-4 panel" style="background-color: red"> some content </div> <div class="col-xs-4 panel" style="background-color: yellow"> catz <img width="100" height="100" src="https://lorempixel.com/100/100/cats/"> </div> <div class="col-xs-4 panel" style="background-color: blue"> some more content </div> </div> </div>


当前回答

我使用clearfix这个超级简单的解决方案,它没有任何副作用。

下面是AngularJS的一个例子:

<div ng-repeat-start="item in list">
    <div class="col-lg-4 col-md-6 col-sm-12 col-xs-12"></div>
</div>
<div ng-repeat-end>
    <div ng-if="$index % 3 == 2" class="clearfix visible-lg"></div>
    <div ng-if="$index % 2 == 1" class="clearfix visible-md"></div>
</div>

还有一个关于PHP的例子:

<?php foreach ($list as $i => $item): ?>
    <div class="col-lg-4 col-md-6 col-sm-12 col-xs-12"></div>
    <div class="clearfix visible-md"></div>
    <?php if ($i % 2 === 1): ?>
        <div class="clearfix visible-lg"></div>
    <?php endif; ?>
<?php endforeach; ?>

其他回答

来自官方文件。也许你可以用在你的案子上。

当你需要等高时,在卡片上加上。h-100。

<div class="row row-cols-1 row-cols-md-3 g-4">
  <div class="col">
   <div class="card h-100">
     <div>.....</div>
  </div>
  <div class="col">
   <div class="card h-100">
     <div>.....</div>
  </div>

要回答你的问题,这是所有你需要看到完整的响应式演示与前缀css:

/* Using col-xs media query breakpoint but you can change 481 to 768 to only apply to col-sm and above if you'd like*/

@media only screen and (min-width : 481px) {
    .flex-row {
        display: flex;
        flex-wrap: wrap;
    }
    .flex-row > [class*='col-'] {
        display: flex;
        flex-direction: column;
    }
    .flex-row.row:after, 
    .flex-row.row:before {
        display: flex;
    }
}

要添加缩略图内容的支持,在伸缩列中,如上面的截图,还添加这个…注意,你也可以在面板上做到这一点:

.flex-row .thumbnail,
.flex-row .caption {
    display: flex;
    flex: 1 0 auto;
    flex-direction: column;
}
.flex-text {
    flex-grow: 1;
}    
.flex-row img {
    width: 100%;
}

虽然flexbox不能在IE9及以下版本中工作,但你可以使用带有条件标签的演示版本,并使用类似javascript网格的东西作为填充:

<!--[if lte IE 9]>

<![endif]-->

As for the other two examples in the accepted answer... The table demo is a decent idea but is being implemented wrong. Applying that CSS on bootstrap column classes specifically will without a doubt break the grid framework entirely. You should be using a custom selector for one and two the tables styles should not be applied to [class*='col-'] that have defined widths. This method should ONLY be used if you want equal height AND equal width columns. It is not meant for any other layouts and is NOT responsive. We can make it fallback however on mobile displays...

<div class="table-row-equal">
<div class="thumbnail">
    Content...
</div>
<div class="thumbnail">
    Content...
</div>
</div>
@media only screen and (min-width : 480px){
    .table-row-equal {
        display: table;
        width: 100%;
        table-layout: fixed;
        border-spacing: 30px 0px;
        word-wrap: break-word;
    }
    .table-row-equal .thumbnail {
        float: none;
        display: table-cell;
        vertical-align: top;
        width: 1%;
    }
}

Lastly, the first demo in the accepted answer which implements a version of the one true layout is a good choice for some situations, but not suitable for bootstrap columns. The reason for this is that all the columns expand to the container height. So this will also break responsiveness since the columns are not expanding to the elements next to them, but the entire container. This method will also not allow you to apply bottom margins to rows any longer and will also cause other issues along the way like scrolling to anchor tags.

有关完整的代码,请参阅自动添加flexbox代码前缀的Codepen。

我很惊讶我在2018年底找不到一个有价值的解决方案。我继续前进,并找出了一个Bootstrap 3解决方案自己使用flexbox。

简单明了的例子:

HTML

<div class="row row-equal">
    <div class="col-lg-4 col-md-4 col-sm-4 col-xs-12 col-equal">
        <p>Text</p>
    </div>
    <div class="col-lg-4 col-md-4 col-sm-4 col-xs-12 col-equal">
        <img src="//placehold.it/200x200">
    </div>
    <div class="col-lg-4 col-md-4 col-sm-4 col-xs-12 col-equal">
        <p>Text</p>
    </div>  
</div>

CSS

img {
  width: 100%;
}
p {
  padding: 2em;
}
@media (min-width: 768px) {
  .row-equal {
    display: flex;
    flex-wrap: wrap;
  }
  .col-equal {
    margin: auto;
  }
}

查看工作演示:http://jsfiddle.net/5kmtfrny/

最新解决方案(2022年)

解决方案4使用Bootstrap 4或5

Bootstrap 4和5默认使用Flexbox,因此不需要额外的CSS。

Demo

<div class="container">
    <div class="row ">
        <div class="col-md-4" style="background-color: red">
          some content
        </div>
        <div class="col-md-4" style="background-color: yellow">
          catz
          <img width="100" height="100" src="https://placekitten.com/100/100/">
        </div>
        <div class="col-md-4" style="background-color: green">
          some more content
        </div>
    </div>
</div>

解决方案1使用负边距(不会破坏响应性)

Demo

.row{
    overflow: hidden; 
}

[class*="col-"]{
    margin-bottom: -99999px;
    padding-bottom: 99999px;
}

解决方案2使用表

Demo

.row {
    display: table;
}

[class*="col-"] {
    float: none;
    display: table-cell;
    vertical-align: top;
}

使用flex的解决方案3于2015年8月添加。在此之前发布的评论不适用于此解决方案。

Demo

.row {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display:         flex;
  flex-wrap: wrap;
}
.row > [class*='col-'] {
  display: flex;
  flex-direction: column;
}

不需要JavaScript。只需添加类.row-等式-height到你现有的.row,就像这样:

<div class="row row-eq-height">
  <div class="col-xs-12 col-sm-4 panel" style="background-color: red">
    some content
  </div>
  <div class="col-xs-6 col-sm-4 panel" style="background-color: yellow">
    kittenz
  <img src="http://placekitten.com/100/100">
  </div>
  <div class="col-xs-6 col-sm-4 panel" style="background-color: blue">
    some more content
  </div>
</div>

提示:如果行中有超过12列,引导网格将无法将其包装。添加一个新的div。row。行-等高每12列。

提示:您可能需要添加

<link rel="stylesheet" href="http://getbootstrap.com.vn/examples/equal-height-columns/equal-height-columns.css" />

到HTML