自举网格系统分为12个网格。所以我把它分成两个网格(7+5)。这7和5也包含满12格。这就是为什么我分开了7(4+4+4)和5(6+6)，这样就可以得到所有的内容，很简单

HTML

<div class="col-sm-12">
  <div class="row">
    <div class="col-sm-7 five-three">
      <div class="row">
        <div class="col-sm-4">
          Column 1
        </div>
        <div class="col-sm-4">
          Column 2
        </div>
        <div class="col-sm-4">
          Column 3
        </div>
      </div>
    </div>
    <div class="col-sm-5 five-two">
      <div class="row">
        <div class="col-sm-6">
          Col 4
        </div>
        <div class="col-sm-6">
          Col 5
        </div>
      </div>
    </div>
  </div>
</div>

CSS

div.col-sm-7.five-three {
  width: 60% !important;
}
div.col-sm-5.five-two {
  width: 40% !important;
}

在bootstrap v4.3.1中，它是一个12 / 5 = 2.4列宽的列。我们称它为col-2dot4(以及col-sm-2dot4, col-md-2dot4，…)

每一列应该有20%的可用空间。

SCSS代码如下所示:

@mixin make-5-grid-column($columns: $grid-columns, $gutter: $grid-gutter-width, $breakpoints: $grid-breakpoints) {

  // Common properties for all breakpoints
  %grid-column {
    position: relative;
    width: 100%;
    padding-right: $gutter / 2;
    padding-left: $gutter / 2;
  }

  @each $breakpoint in map-keys($breakpoints) {
    $infix: breakpoint-infix($breakpoint, $breakpoints);

    .col#{$infix}-2dot4 {
      @extend %grid-column;
    }

    .col#{$infix},
    .col#{$infix}-auto {
      @extend %grid-column;
    }

    @include media-breakpoint-up($breakpoint, $breakpoints) {

      // Provide basic `.col-{bp}` classes for equal-width flexbox columns
      .col#{$infix} {
        flex-basis: 0;
        flex-grow: 1;
        max-width: 100%;
      }

      .col#{$infix}-auto {
        flex: 0 0 auto;
        width: auto;
        max-width: 100%; // Reset earlier grid tiers
      }


      .col#{$infix}-2dot4 {
        @include make-col(1, 5);
      }
    }
  }
}

@if $enable-grid-classes {
  @include make-5-grid-column();
}

五列显然不是bootstrap设计的一部分。

但是对于Bootstrap v4 (alpha)，有两件事可以帮助处理复杂的网格布局

Flex (http://v4-alpha.getbootstrap.com/getting-started/flexbox/)，新的元素类型(官方- https://www.w3.org/TR/css-flexbox-1/) 响应式实用程序(http://v4-alpha.getbootstrap.com/layout/responsive-utilities/)

简单来说，我在用

<style>
.flexc { display: flex; align-items: center; padding: 0; justify-content: center; }
.flexc a { display: block; flex: auto; text-align: center; flex-basis: 0; }
</style>
<div class="container flexc hidden-sm-down">
  <!-- content to show in MD and larger viewport -->
  <a href="#">Link/Col 1</a>
  <a href="#">Link/Col 2</a>
  <a href="#">Link/Col 3</a>
  <a href="#">Link/Col 4</a>
  <a href="#">Link/Col 5</a>
</div>
<div class="container hidden-md-up">
  <!-- content to show in SM and smaller viewport, I don't think 5 cols in smaller viewport are gonna be alright :) -->
</div>

不管是5 7 9 11 13还是其他概率，都没问题。 我非常确定12网格标准能够服务于90%以上的用例——所以让我们以这种方式设计——也更容易开发!

flex教程在这里“https://css-tricks.com/snippets/css/a-guide-to-flexbox/”

为5列布局创建自定义引导下载

进入Bootstrap 2.3.2(或Bootstrap 3)自定义页面，设置以下变量(不要输入分号):

@gridColumns:           5;
@gridColumnWidth:       172px;
@gridColumnWidth1200:   210px;
@gridColumnWidth768:    128px;
@gridGutterWidth768:    21px;

下载您的构建。这个网格将适合默认的容器，(几乎)保留默认的沟槽宽度。

注意:如果你使用LESS，更新变量。而不是更少。

与flexbox http://output.jsbin.com/juziwu

.flexrow { 显示:flex; 背景:浅灰色;/ * * /调试 ｝ .flexrow > * { flex: 1; 保证金:1 em; 大纲:自动绿色; ｝ < div class = " flexrow”> < div >…< / div > < div >…< / div > < div >…< / div > < div >。< br >。< / div > < div >…< / div > < / div >

.col-half-offset{
    margin-left:4.166666667% !important;
    float: left;
}

<div className="row1 marginTop20">
    <div className="col-xs-12 col-sm-2 col-md-2">
        1
    </div>
    <div className="col-xs-12 col-sm-2 col-md-2 col-half-offset">
        2
    </div>
    <div className="col-xs-12 col-sm-2 col-md-2 col-half-offset">
        3
    </div>
    <div className="col-xs-12 col-sm-2 col-md-2 col-half-offset">
        4
    </div>
    <div className="col-xs-12 col-sm-2 col-md-2 col-half-offset">
        5
    </div>
    <div className="clearfix"></div>
</div>