将不同尺寸的图像居中的通用方法

Question

我要显示一系列发射，我想将每个发射的图像居中但是图像可以有不同的尺寸，我不想让它们变形

#emission .card_emission_container_circle {
  padding: 30px;
  width: 350px;
  height: 350px;
  position: relative;
  text-align: center;
  margin-bottom: 20px;
}

#emission .card_emission_circle {
  box-shadow: 0 12px 16px 0 rgba(0, 0, 0, 0.24), 0 17px 50px 0 rgba(0, 0, 0, 0.19) !important;
  text-align: center;
  transition: box-shadow 0.3s;
  border-radius: 50%;
  width: 300px;
  height: 300px;
}

#emission .card_emission_circle:hover {
  box-shadow: 0 12px 16px 0 rgba(216, 63, 65, 1), 0 17px 50px 0 rgba(216, 63, 65, 1) !important;
}

#emission .card_emission_image_circle img {
  border-radius: 50%;
  max-width: 300px;
  max-height: 300px;
}

#emission .card_emission_container_circle a {
  text-decoration: none;
  color: rgba(37, 39, 51, 0.9);
  width: 300px;
  height: 300px;
}

#emission .card_emission_descript_circle {
    border-radius: 10%;
    z-index: 2;
    padding: 0.01em 16px;
    text-align: center;
    overflow-y: hidden;
    text-overflow: ellipsis;
    word-wrap: break-word;
    position: absolute;
    top: 100px;
    opacity: 0;
    width: 300px;
    height: 300px;
}

#emission .card_emission_descript_circle a {
    text-decoration: none;
    color: rgba(37, 39, 51, 0.9);
    width: 300px;
    height: 300px;
}

<div id="emission">
  <div class="card_emission_container_circle grid-4 grid-t-6 grid-m-12">
    <a class="ajax" href="./contentEmission.php?chrid=7">

      <div class="card_emission_circle">
        <div class="card_emission_image_circle">
          <img src="https://www.chassimages.com/mag/wp-content/uploads/2017/02/ImageJour-ThomasMeunier-300x160.jpg" alt="Image de l'émission">

        </div>

        <div class="card_emission_descript_circle">
          <p>Description</p>
        </div>

      </div>
      <div class="card_emission_title_circle">
        <h3>Title</h3>
      </div>
    </a>
  </div>


  <div class="card_emission_container_circle grid-4 grid-t-6 grid-m-12">
    <a class="ajax" href="./contentEmission.php?chrid=7">

      <div class="card_emission_circle">
        <div class="card_emission_image_circle">
          <img src="https://www.france.tv/image/carre/300/300/0/9/9/b5b0b7bd-b4ed2457c172bf7c0abd9e904aff7f5f1a0fea5d60eca094df1dd476b0c6a990.jpg" alt="Image de l'émission">

        </div>

        <div class="card_emission_descript_circle">
          <p>Description</p>
        </div>

      </div>
      <div class="card_emission_title_circle">
        <h3>Title</h3>
      </div>
    </a>
  </div>
</div>

第二个很好，第一个不正确，我想将它垂直居中到 div，问题是我需要通用的解决方案，它可以应用于所有图像，好的或'bad'尺寸

Answer 1

您似乎没有相同尺寸的图片，所以可以将图片用作背景...

您还使用了 vertical-align:center，对于 vertical-align...[Reference Link][=26 无效属性 =]

vertical-align 也适用于 display:table-cell 和 display:inline-block...所以这里不需要使用...

另外我在card_emission_circleclass中使用了Flexboxdisplay:flex所以里面的item可以占满width and height of parent just use flex:1 to the inner item...另一种方法是使用 width:100% and height:100% to the inner item without using flex

堆栈片段

#emission .card_emission_container_circle {
  padding: 30px;
  width: 350px;
  height: 350px;
  position: relative;
  text-align: center;
  margin-bottom: 20px;
}

#emission .card_emission_circle {
  box-shadow: 0 12px 16px 0 rgba(0, 0, 0, 0.24), 0 17px 50px 0 rgba(0, 0, 0, 0.19) !important;
  text-align: center;
  transition: box-shadow 0.3s;
  border-radius: 50%;
  width: 300px;
  height: 300px;
  display: flex;
}

#emission .card_emission_circle:hover {
  box-shadow: 0 12px 16px 0 rgba(216, 63, 65, 1), 0 17px 50px 0 rgba(216, 63, 65, 1) !important;
}

#emission .card_emission_container_circle a {
  text-decoration: none;
  color: rgba(37, 39, 51, 0.9);
  width: 300px;
  height: 300px;
}

.card_emission_image_circle {
  flex: 1;
  border-radius: 50%;
  background-size: cover;
  background-position: center center;
}

<div id="emission">
  <div class="card_emission_container_circle grid-4 grid-t-6 grid-m-12">
    <a class="ajax" href="./contentEmission.php?chrid=22">
      <div class="card_emission_circle">
        <div class="card_emission_image_circle" style="background-image:url(https://www.chassimages.com/mag/wp-content/uploads/2017/02/ImageJour-ThomasMeunier-300x160.jpg)">
        </div>
      </div>
    </a>
  </div>
  <div class="card_emission_container_circle grid-4 grid-t-6 grid-m-12">
    <a class="ajax" href="./contentEmission.php?chrid=22">
      <div class="card_emission_circle">
        <div class="card_emission_image_circle" style="background-image:url(https://www.france.tv/image/carre/300/300/0/9/9/b5b0b7bd-b4ed2457c172bf7c0abd9e904aff7f5f1a0fea5d60eca094df1dd476b0c6a990.jpg)">
        </div>
      </div>
    </a>
  </div>
</div>

Answer 2

这里有两个选项：

使用top: 50%; transform: translateY(-50%);方法
使用 flex 和 align-items - 首选，imo

方法如下：

1. 它需要在 #emission .card_emission_image_circle 元素中添加一个 height: 100%。

然后我们可以给 #emission .card_emission_image_circle img 元素 top: 50%; transform: translateY(-50%) 处理。

#emission .card_emission_image_circle {
  height: 100%;
}

#emission .card_emission_image_circle img {
  position: relative;
  top: 50%;
  transform: translateY(-50%);
  border-radius: 50%;
  max-width: 300px;
  max-height: 300px;
}

#emission .card_emission_container_circle {
  padding: 30px;
  width: 350px;
  height: 350px;
  position: relative;
  text-align: center;
  margin-bottom: 20px;
}

#emission .card_emission_circle {
  box-shadow: 0 12px 16px 0 rgba(0, 0, 0, 0.24), 0 17px 50px 0 rgba(0, 0, 0, 0.19) !important;
  text-align: center;
  transition: box-shadow 0.3s;
  border-radius: 50%;
  width: 300px;
  height: 300px;
  position: relative;
}

#emission .card_emission_circle:hover {
  box-shadow: 0 12px 16px 0 rgba(216, 63, 65, 1), 0 17px 50px 0 rgba(216, 63, 65, 1) !important;
}

#emission .card_emission_image_circle {
  height: 100%;
}

#emission .card_emission_image_circle img {
  position: relative;
  top: 50%;
  transform: translateY(-50%);
  border-radius: 50%;
  max-width: 300px;
  max-height: 300px;
}

#emission .card_emission_container_circle a {
  text-decoration: none;
  color: rgba(37, 39, 51, 0.9);
  width: 300px;
  height: 300px;
}

#emission .card_emission_descript_circle {
  border-radius: 10%;
  z-index: 2;
  padding: 0.01em 16px;
  text-align: center;
  overflow-y: hidden;
  text-overflow: ellipsis;
  word-wrap: break-word;
  position: absolute;
  top: 100px;
  opacity: 0;
  width: 300px;
  height: 300px;
}

#emission .card_emission_descript_circle a {
  text-decoration: none;
  color: rgba(37, 39, 51, 0.9);
  width: 300px;
  height: 300px;
}

<div id="emission">
  <div class="card_emission_container_circle grid-4 grid-t-6 grid-m-12">
    <a class="ajax" href="./contentEmission.php?chrid=7">

      <div class="card_emission_circle">
        <div class="card_emission_image_circle">
          <img src="https://www.chassimages.com/mag/wp-content/uploads/2017/02/ImageJour-ThomasMeunier-300x160.jpg" alt="Image de l'émission">

        </div>

        <div class="card_emission_descript_circle">
          <p>Description</p>
        </div>

      </div>
      <div class="card_emission_title_circle">
        <h3>Title</h3>
      </div>
    </a>
  </div>


  <div class="card_emission_container_circle grid-4 grid-t-6 grid-m-12">
    <a class="ajax" href="./contentEmission.php?chrid=7">

      <div class="card_emission_circle">
        <div class="card_emission_image_circle">
          <img src="https://www.france.tv/image/carre/300/300/0/9/9/b5b0b7bd-b4ed2457c172bf7c0abd9e904aff7f5f1a0fea5d60eca094df1dd476b0c6a990.jpg" alt="Image de l'émission">

        </div>

        <div class="card_emission_descript_circle">
          <p>Description</p>
        </div>

      </div>
      <div class="card_emission_title_circle">
        <h3>Title</h3>
      </div>
    </a>
  </div>
</div>

2. 这是一个更简单的更改，只需要添加以下样式：

#emission .card_emission_image_circle {
  height: 100%;
  display: flex;
  align-items: center;
}

#emission .card_emission_container_circle {
  padding: 30px;
  width: 350px;
  height: 350px;
  position: relative;
  text-align: center;
  margin-bottom: 20px;
}

#emission .card_emission_circle {
  box-shadow: 0 12px 16px 0 rgba(0, 0, 0, 0.24), 0 17px 50px 0 rgba(0, 0, 0, 0.19) !important;
  text-align: center;
  transition: box-shadow 0.3s;
  border-radius: 50%;
  width: 300px;
  height: 300px;
}

#emission .card_emission_circle:hover {
  box-shadow: 0 12px 16px 0 rgba(216, 63, 65, 1), 0 17px 50px 0 rgba(216, 63, 65, 1) !important;
}

#emission .card_emission_image_circle {
  height: 100%;
  display: flex;
  align-items: center;
}

#emission .card_emission_image_circle img {
  border-radius: 50%;
  max-width: 300px;
  max-height: 300px;
}

#emission .card_emission_container_circle a {
  text-decoration: none;
  color: rgba(37, 39, 51, 0.9);
  width: 300px;
  height: 300px;
}

#emission .card_emission_descript_circle {
    border-radius: 10%;
    z-index: 2;
    padding: 0.01em 16px;
    text-align: center;
    overflow-y: hidden;
    text-overflow: ellipsis;
    word-wrap: break-word;
    position: absolute;
    top: 100px;
    opacity: 0;
    width: 300px;
    height: 300px;
}

#emission .card_emission_descript_circle a {
    text-decoration: none;
    color: rgba(37, 39, 51, 0.9);
    width: 300px;
    height: 300px;
}

<div id="emission">
  <div class="card_emission_container_circle grid-4 grid-t-6 grid-m-12">
    <a class="ajax" href="./contentEmission.php?chrid=7">

      <div class="card_emission_circle">
        <div class="card_emission_image_circle">
          <img src="https://www.chassimages.com/mag/wp-content/uploads/2017/02/ImageJour-ThomasMeunier-300x160.jpg" alt="Image de l'émission">

        </div>

        <div class="card_emission_descript_circle">
          <p>Description</p>
        </div>

      </div>
      <div class="card_emission_title_circle">
        <h3>Title</h3>
      </div>
    </a>
  </div>


  <div class="card_emission_container_circle grid-4 grid-t-6 grid-m-12">
    <a class="ajax" href="./contentEmission.php?chrid=7">

      <div class="card_emission_circle">
        <div class="card_emission_image_circle">
          <img src="https://www.france.tv/image/carre/300/300/0/9/9/b5b0b7bd-b4ed2457c172bf7c0abd9e904aff7f5f1a0fea5d60eca094df1dd476b0c6a990.jpg" alt="Image de l'émission">

        </div>

        <div class="card_emission_descript_circle">
          <p>Description</p>
        </div>

      </div>
      <div class="card_emission_title_circle">
        <h3>Title</h3>
      </div>
    </a>
  </div>
</div>

将不同尺寸的图像居中的通用方法

Generic way to center images of different sizes

html

css

center