如何使浮动图片库居中

Question

我希望 .container 的内容居中。 我正在使用 float:left 属性来创建画廊。它也是调整缩略图大小和裁剪缩略图的代码的一部分。

有什么方法可以做到这一点？

CSS：

.grid-item { 
    float: left;
    width: 175px;
    height: 120px;
    overflow: hidden;
}
.grid-item img {
    display: block;
    max-width: 100%;
    border: 2px solid #fff;
    border-radius: 5px;
    margin: 0 auto;
}

HTML：

<div class="container text-center">
    <div id="links">
        <a href="img.jpg" title="" class="grid-item" data-gallery>
            <img src="img.jpg" alt="" class="img-rounded">
        </a>
        <a href="img.jpg" title="" class="grid-item" data-gallery>
            <img src="img.jpg" alt="" class="img-rounded">
        </a>
        <a href="img.jpg" title="" class="grid-item" data-gallery>
            <img src="img.jpg" alt="" class="img-rounded">
        </a>
    </div>
</div>

Answer 1

您应该使用 flexbox 来对齐您的内容，并且您可以阅读 CSS 中的 cmets 来了解为什么要使用哪个属性。希望，它会有所帮助。

#links{
display: flex;  /*Generates a flexbox layout with default flex direction as row */
  width: 100%; /* Not really required */
  align-items: center; /*Aligns contents vertically */
  justify-content: space-around; /*Aligns contents horizontally */
  text-align: center; /*Aligns further text in the center */
  flex-direction:row; /*By default its row, you can change to column for vertical alignment */
  flex-flow:row wrap; /*To wrap items in other row when no more can be fit in the same row*/
}

.grid-item {
  /* flex:1; If you need them to grow or shrink flexibly */
  width: 175px;
  height: 120px;
  overflow: hidden;
}

.grid-item img {
  display: block;
  max-width: 100%;
  border: 2px solid #fff;
  border-radius: 5px;
  margin: 0 auto;
}

<div class="container text-center">
  <div id="links">
    <a href="http://via.placeholder.com/400x400" title="" class="grid-item" data-gallery>
      <img src="http://via.placeholder.com/400x400" alt="" class="img-rounded">
    </a>
    <a href="http://via.placeholder.com/400x400" title="" class="grid-item" data-gallery>
      <img src="http://via.placeholder.com/400x400" alt="" class="img-rounded">
    </a>
    <a href="http://via.placeholder.com/400x400" title="" class="grid-item" data-gallery>
      <img src="http://via.placeholder.com/400x400" alt="" class="img-rounded">
    </a>
  </div>
</div>

Answer 2

通常当我遇到这种情况时，我会将容器中的所有内容嵌套在一个子容器中并根据自己的喜好进行调整：

.container .center {
  /* 
  This is just a way of centering the element,
  you can use whatever technique.
  */
  position:absolute;
  top:50%;
  left:50%;
  transform:translateX(-50%) translateY(-50%);
}

<div class="container text-center">
  <div class="center">
    <div id="links">
        <a href="img.jpg" title="" class="grid-item" data-gallery>
            <img src="img.jpg" alt="" class="img-rounded">
        </a>
        <a href="img.jpg" title="" class="grid-item" data-gallery>
            <img src="img.jpg" alt="" class="img-rounded">
        </a>
        <a href="img.jpg" title="" class="grid-item" data-gallery>
            <img src="img.jpg" alt="" class="img-rounded">
        </a>
    </div>
  </div>
</div>