如何在父 div 中水平居中三个 div？ [复制]

【问题标题】：How to center three divs horizontally within a parent div? [duplicate]如何在父 div 中水平居中三个 div？ [复制]
【发布时间】：2016-10-16 07:34:58
【问题描述】：

我知道这个问题经常被问到，但我似乎永远无法让它发挥作用。你能告诉我有什么问题吗？

我在 #container div 中有三个 div，我想将它们并排居中。 #container 是 1000px 宽（我想保持这种状态）。这是我的代码：

#container {
  margin-top: 500px;
  position: absolute;
  width: 1000px;
}
.related-article {
  background-color: #D6A400;
  display: inline-block;
  width: 230px;
  height: 300px;
  border-radius: 30px;
  margin-bottom: 0px;
}
.related-article > img {
  width: 200px;
  height: 150px;
  border-radius: 15px;
  margin-top: 15px;
}
.related-article > h3 {
  font-size: 15px;
  width: 180px;
  text-align: justify;
  margin-left: auto;
  margin-right: auto;
  color: #f1f1f1;
  font-family: Abel, serif;
  margin-bottom: none;
}
a {
  text-decoration: none;
}
#right {
  float: right;
}
#left {
  float: left;
}
#center {
  margin-left: 385px;
  margin-right: 385px;
}
<div id="container">
  <h2>Here's what you'll do!</h2>
  <div id="left">
    <a href="#" class="related-article first" align="middle">
      <img src="download.jpeg" alt="T-rex">
      <h3>Constructing amazing fossils you never even dreamed of</h3>
    </a>
  </div>
  <div id="center">
    <a href="#" class="related-article second" align="middle">
      <img src="fossil-fish-10-lg.jpg" alt="Fish">
      <h3>Studying ancient marine biology</h3>
    </a>
  </div>
  <div id="right">
    <a href="#" class="related-article third" align="middle">
      <img src="fossil.turtle2.jpg" alt="Turtle">
      <h3>Uncovering the world's greatest mysteries</h3>
    </a>
  </div>
</div>

所有帮助将不胜感激。

【问题讨论】：

    标签： html css


    【解决方案1】：

    您可以使用 flexbox 非常简单地做到这一点：

    #container {
/*     margin-top: 500px; */
  width: 1000px;
  margin: 0 auto;
}
.related-article {
  background-color: #D6A400;
  display: inline-block;
  border-radius: 30px;
  margin-bottom: 0px;
}
.related-article > img {
    width: 200px;
    height: 150px;
    border-radius: 15px;
    margin-top: 15px;
}
.related-article > h3 {
  font-size: 15px;
  width: 180px;
  text-align: justify;
  margin-left: auto;
  margin-right: auto;
  color: #f1f1f1;
  font-family: Abel, serif;
  margin-bottom: none;
}
a {
    text-decoration: none;
}

}
#container {
    width: 1000px;
}

.related-article {
  background-color: #D6A400;
  display: inline-block;
  width: 230px;
  height: 300px;
  border-radius: 30px;
  margin-bottom: 0px;
}
.related-article > img {
    width: 200px;
    height: 150px;
    border-radius: 15px;
    margin-top: 15px;
}
.related-article > h3 {
  font-size: 15px;
  width: 180px;
  text-align: justify;
  margin-left: auto;
  margin-right: auto;
  color: #f1f1f1;
  font-family: Abel, serif;
  margin-bottom: none;
}
a {
    text-decoration: none;
}
.box {
  margin-right: 10px;
    width: 230px;
  height: 300px;
  }

.flex-container {
  display: flex;
  align-items: center;
  justify-content: center;
}
    <div id="container">
        <h2>Here's what you'll do!</h2>
        <div class="flex-container">
        <div id="left" class="box">
          <a href="#" class="related-article first" align="middle">
            <img src="download.jpeg" alt="T-rex">
            <h3>Constructing amazing fossils you never even dreamed of</h3>
          </a>
          </div>
          <div id="center"  class="box">
          <a href="#" class="related-article second" align="middle">
            <img src="fossil-fish-10-lg.jpg" alt="Fish">
            <h3>Studying ancient marine biology</h3>
          </a>
          </div>
          <div id="right"  class="box">
          <a href="#" class="related-article third" align="middle">
            <img src="fossil.turtle2.jpg" alt="Turtle">
            <h3>Uncovering the world's greatest mysteries</h3>
          </a>
          </div>
          </div>
        </div>

    【讨论】：

      【解决方案2】：

      使用display: flex 的解决方案。阅读更多关于 flexbox 的信息here

      1. 将display: flex 应用于容器
      2. 将flex: 1 添加到所有要水平居中的孩子。

      h2 {
  margin-top: 500px;
}
#container {
  position: absolute;
  width: 1000px;
  display: flex;
  text-align: center;
}
#container div {
  flex: 1;
}
.related-article {
  background-color: #D6A400;
  display: inline-block;
  width: 230px;
  height: 300px;
  border-radius: 30px;
  margin-bottom: 0px;
}
.related-article > img {
  width: 200px;
  height: 150px;
  border-radius: 15px;
  margin-top: 15px;
}
.related-article > h3 {
  font-size: 15px;
  width: 180px;
  text-align: justify;
  margin-left: auto;
  margin-right: auto;
  color: #f1f1f1;
  font-family: Abel, serif;
  margin-bottom: none;
}
a {
  text-decoration: none;
}
      <h2>Here's what you'll do!</h2>
<div id="container">
  <div id="left">
    <a href="#" class="related-article first" align="middle">
      <img src="download.jpeg" alt="T-rex">
      <h3>Constructing amazing fossils you never even dreamed of</h3>
    </a>
  </div>
  <div id="center">
    <a href="#" class="related-article second" align="middle">
      <img src="fossil-fish-10-lg.jpg" alt="Fish">
      <h3>Studying ancient marine biology</h3>
    </a>
  </div>
  <div id="right">
    <a href="#" class="related-article third" align="middle">
      <img src="fossil.turtle2.jpg" alt="Turtle">
      <h3>Uncovering the world's greatest mysteries</h3>
    </a>
  </div>
</div>

      【讨论】：

        【解决方案3】：

        删除所有的浮点数并替换为：

        display: inline-block;

        此外，正如我所尝试的那样，由于 div 之间的间距，您将无法以正确的方式显示它们。使#left、#center 和#right div 之间的空间小于50px，或者使用百分比(%)。

        【讨论】：

          【解决方案4】：

          您可以为此使用display:table..

          你可以拥有带有样式的父 div 

          display:table

          和你的 3 个子 div 为 

          display:table-cell 


          #container {
  margin-top: 500px;
  position: absolute;
  width: 1000px;
}
.related-article {
  background-color: #D6A400;
  display: inline-block;
  width: 230px;
  height: 300px;
  border-radius: 30px;
  margin-bottom: 0px;
}
.related-article > img {
  width: 200px;
  height: 150px;
  border-radius: 15px;
  margin-top: 15px;
}
.related-article > h3 {
  font-size: 15px;
  width: 180px;
  text-align: justify;
  margin-left: auto;
  margin-right: auto;
  color: #f1f1f1;
  font-family: Abel, serif;
  margin-bottom: none;
}
a {
  text-decoration: none;
}
#container {
  margin-top: 500px;
  position: absolute;
  width: 1000px;
  display: table;
}
.related-article {
  background-color: #D6A400;
  display: inline-block;
  width: 230px;
  height: 300px;
  border-radius: 30px;
  margin-bottom: 0px;
}
.related-article > img {
  width: 200px;
  height: 150px;
  border-radius: 15px;
  margin-top: 15px;
}
.related-article > h3 {
  font-size: 15px;
  width: 180px;
  text-align: justify;
  margin-left: auto;
  margin-right: auto;
  color: #f1f1f1;
  font-family: Abel, serif;
  margin-bottom: none;
}
a {
  text-decoration: none;
}
#left,
#right,
#center {
  display: table-cell;
}
#center {
  margin-left: 385px;
  margin-right: 385px;
}
h2 {
  display: table-row;
}
          <div id="container">
  <h2>Here's what you'll do!</h2>
  <div id="left">
    <a href="#" class="related-article first" align="middle">
      <img src="download.jpeg" alt="T-rex">
      <h3>Constructing amazing fossils you never even dreamed of</h3>
    </a>
  </div>
  <div id="center">
    <a href="#" class="related-article second" align="middle">
      <img src="fossil-fish-10-lg.jpg" alt="Fish">
      <h3>Studying ancient marine biology</h3>
    </a>
  </div>
  <div id="right">
    <a href="#" class="related-article third" align="middle">
      <img src="fossil.turtle2.jpg" alt="Turtle">
      <h3>Uncovering the world's greatest mysteries</h3>
    </a>
  </div>
</div>

          【讨论】：

            【解决方案5】：

            从三个中删除float并将display: inline-block添加到所有三个中，然后将text-align: center;添加到容器中。

            【讨论】：

            【解决方案6】：

            试试这个，将 float:left 添加到您的 right、left 和 center div 并减少您的 ma​​rgin left 和 right 中心 div。

            #right {
float: left;
}
#left {
float: left;
}
#center {
margin-left: 85px;
margin-right: 85px;
float:left;
}

            【讨论】：

              【解决方案7】：

              而不是添加中心、左侧和右侧。使用 ul 并以百分比设置 li 的宽度。它将改进代码并减少 css 代码。

              codepen 网址是http://codepen.io/SESN/pen/pbbjrb

              CSS

              #container { width: 100%; }
.ulContainer { margin: 0px auto; list-style: none; width: 80%; }
.ulContainer li { width: 33.33%; float: left; }

              HTML

              <div id="container">
        <h2>Here's what you'll do!</h2>
  <ul class="ulContainer">
  <li>
    <a href="#" class="related-article first" align="middle">
            <img src="download.jpeg" alt="T-rex">
            <h3>Constructing amazing fossils you never even dreamed of</h3>
          </a>
  </li>
    <li>
    <a href="#" class="related-article second" align="middle">
            <img src="fossil-fish-10-lg.jpg" alt="Fish">
            <h3>Studying ancient marine biology</h3>
          </a>
    </li>
    <li>
    <a href="#" class="related-article third" align="middle">
            <img src="fossil.turtle2.jpg" alt="Turtle">
            <h3>Uncovering the world's greatest mysteries</h3>
          </a>
    </li>
  </ul>
        </div>

              【讨论】：

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