CSS 如何在 flexbox 中每行显示 3 个项目？

How to display 3 items per row in flexbox?

提问by Youssef Boudaya

I have a list and I want to display my lielements horizontally and 3 per row. I've been trying to get what I want, but no luck. Is there a solution?

我有一个列表，我想li水平显示我的元素，每行 3 个。我一直试图得到我想要的，但没有运气。有解决办法吗？

<div class="serv">
  <ul>                                             
    @foreach(App\Http\Controllers\HomeController::getservice($service->id) as 
    $key => $value)
    <li>
      <span class="h3-service">{{$value->title}}</span>
      <p>{!!$value->description!!}</p>
    </li>
    @endforeach
  </ul>
</div>

---

---

.serv ul {
  display: inline-flex;
  margin: 0;
  padding: 0;
  width: 33%;
  text-align: left;
  float: left;
}
.serv ul li {
  list-style: none;
  display: inline-block;
  padding: 0;
}
.serv ul li span {
  padding: 0;
}

回答by Stickers

Flex container:

弹性容器：

• You probably want to use display: flexnot inline-flex.
• Add flex-wrap: wrapto allow wrapping onto multiple lines.
• Remove width: 33%if you wish it to take entire space avaiable.

• 您可能想使用display: flexnot inline-flex。
• 添加flex-wrap: wrap以允许换行到多行。
• width: 33%如果您希望它占用整个可用空间，请将其删除。

For 3 items per row, add on the flex items:

对于每行 3 个项目，添加弹性项目：

• flex-basis: 33.333333%
• You can also use the flex's shorthand like the following: flex: 0 0 33.333333%=> which also means flex-basis: 33.333333%.

• flex-basis: 33.333333%
• 您也可以flex像下面这样使用的简写：flex: 0 0 33.333333%=> 这也意味着flex-basis: 33.333333%.

.serv ul {
  display: flex;
  flex-wrap: wrap;
  padding-left: 0;
}

.serv ul li {
  list-style: none;
  flex: 0 0 33.333333%;
}

<div class="serv">
  <ul>
    <li>1</li>
    <li>2</li>
    <li>3</li>
    <li>4</li>
    <li>5</li>
    <li>6</li>
  </ul>
</div>

回答by Johannes

Erase the width for the ulelement and add a width (between 26 and 33%) to li. In addition, use flex-wrap: wrap;to allow them to wrap to new lines:

擦除ul元素的宽度并将宽度（介于 26 和 33% 之间）添加到li。此外，使用flex-wrap: wrap;允许它们换行：

.serv ul {
  display: inline-flex;
  flex-wrap: wrap;
  margin: 0;
  padding: 0;
  text-align: left;

}

.serv ul li {
  list-style: none;
  display: inline-block;
  padding: 0;
  border: 1px solid #ccc;
  width: 30%;}

.serv ul li span {
  padding: 0px;
}

<div class="content-wrap">
  <section id="section-linemove-{{$service->id}}">
    <div class="col-lg-12 col-md-12 col-sm-12 col-xs-12">
      <div class="big-title3 small-area">
        <h4>{{$service->title2}}</h4>
      </div>
      <div>
        {!!$service->description!!}
      </div>
    </div>
    <div class="serv">
      <ul>
        <li>
          <span class="h3-service">{{$value->title}}</span>
          <p>{!!$value->description!!}</p>
        </li>
        <li>
          <span class="h3-service">{{$value->title}}</span>
          <p>{!!$value->description!!}</p>
        </li>
        <li>
          <span class="h3-service">{{$value->title}}</span>
          <p>{!!$value->description!!}</p>
        </li>
        <li>
          <span class="h3-service">{{$value->title}}</span>
          <p>{!!$value->description!!}</p>
        </li>
        <li>
          <span class="h3-service">{{$value->title}}</span>
          <p>{!!$value->description!!}</p>
        </li>
        <li>
          <span class="h3-service">{{$value->title}}</span>
          <p>{!!$value->description!!}</p>
        </li>
        <li>
          <span class="h3-service">{{$value->title}}</span>
          <p>{!!$value->description!!}</p>
        </li>
        <li>
          <span class="h3-service">{{$value->title}}</span>
          <p>{!!$value->description!!}</p>
        </li>
        <li>
          <span class="h3-service">{{$value->title}}</span>
          <p>{!!$value->description!!}</p>
        </li>
        <li>
          <span class="h3-service">{{$value->title}}</span>
          <p>{!!$value->description!!}</p>
        </li>
        <li>
          <span class="h3-service">{{$value->title}}</span>
          <p>{!!$value->description!!}</p>
        </li>
        <li>
          <span class="h3-service">{{$value->title}}</span>
          <p>{!!$value->description!!}</p>
        </li>
        <li>
          <span class="h3-service">{{$value->title}}</span>
          <p>{!!$value->description!!}</p>
        </li>
      </ul>
    </div>
  </section>
</div>

回答by Tazwar Utshas

use that witdh:33% at li section, not in ul section.

在 li 部分使用该 witdh:33%，而不是在 ul 部分。

回答by T04435

I had this same issue, but the selected correct answer did not work cause the my child itemsneeded to have a fix widthso here is my solution to show X items of fix width on DISPLAY: FLEX.

我遇到了同样的问题，但选择的正确答案不起作用，导致我的子项需要有固定宽度，所以这里是我的解决方案，用于在DISPLAY: FLEX上显示X 项固定宽度。

// Flex item width required: 215px
// Flex item margin 20px on each side: 215px + 20 + 20 = 255px
// I needed 3(your item per row) so: 255px * 3
// Then to (100% of parent-flex minus 255 * 3) / 2 padding on each side
// So it stays in the center.
padding: 40px calc((100% - (255px * 3)) / 2);

*, *::before, *::after {
    box-sizing: border-box;
}

.parent-flex {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  background-color: tomato;
  padding: 40px calc((100% - (255px * 3)) / 2);
}

.flex-item {
   height: 100px;
   flex: 0 0 215px;
   margin: 1em 20px;
   border: 2px blue solid;
}

<div class="parent-flex">
  <div class="flex-item"></div>
  <div class="flex-item"></div>
  <div class="flex-item"></div>
  <div class="flex-item"></div>
  <div class="flex-item"></div>
  <div class="flex-item"></div>
  <div class="flex-item"></div>
  <div class="flex-item"></div>
  <div class="flex-item"></div>
  <div class="flex-item"></div>
</div>