在固定高度容器中垂直居中元素[重复]

Question

我有一个需要基于像素的导航栏的网站 - 在本例中为 height: 80px。

问题是，我无法将ul 和li 元素垂直居中。

我尝试过使用：top:50%; transform: translate(0,-50%)，如我的 jsfiddle 中所示，也尝试过使用 flex 定位，但都没有奏效。

Jsfiddle：https://jsfiddle.net/agreyfield91/w3s8cj92/

header {
  height: 80px;
  position: fixed;
  top: 0;
  transition: top 0.2s ease-in-out;
  width: 100%;
}

footer {
  background: #ddd;
}

* {
  color: transparent
}

nav {
  height: 100%;
  width: 100%;
  background-color: bisque;
}

nav ul {
  list-style: none;
  text-align: center;
  margin: 0;
  padding: 0;
  top: 50%;
  transform: translate(0, -50%);
}

nav ul li {
  display: inline-block;
  float: left;
}

nav ul li a {
  display: block;
  padding: 15px;
  text-decoration: none;
  color: #aaa;
  font-weight: 800;
  text-transform: uppercase;
  margin: 0 10px;
}

<header class="nav-down">
  <nav class="headernav">
    <ul>
      <li><a href="#">Gig</a></li>
      <li><a href="#">ity</a></li>
      <li><a href="#">element</a></li>
    </ul>
  </nav>
</header>

Answer 1

您需要将position: relative 添加到nav 和position: absolute 到nav ul（以使top: 50%; transform: translate(0,-50%); 工作），或者您可以在nav 上使用display: flex; align-items: center。我只会使用 flexbox。

header {
  height: 80px;
  position: fixed;
  top: 0;
  transition: top 0.2s ease-in-out;
  width: 100%;
}

footer {
  background: #ddd;
}

* {
  color: transparent
}

nav {
  height: 100%;
  width: 100%;
  background-color: bisque;
  display: flex;
  align-items: center;
}

nav ul {
  list-style: none;
  text-align: center;
  margin: 0;
  padding: 0;
}

nav ul li {
  display: inline-block;
  float: left;
}

nav ul li a {
  display: block;
  padding: 15px;
  text-decoration: none;
  color: #aaa;
  font-weight: 800;
  text-transform: uppercase;
  margin: 0 10px;
}

<header class="nav-down">
  <nav class="headernav">
    <ul>
      <li><a href="#">Gig</a></li>
      <li><a href="#">ity</a></li>
      <li><a href="#">element</a></li>
    </ul>
  </nav>
</header>

Answer 2

添加显示 flex 和 align-self 居中：https://jsfiddle.net/w3s8cj92/1/

header {
  height: 80px;
  position: fixed;
  top: 0;
  transition: top 0.2s ease-in-out;
  width: 100%;
}

footer {
  background: #ddd;
}

* {
  color: transparent
}

nav {
  height: 100%;
  width: 100%;
  background-color: bisque;
  display: flex;
}

nav ul {
  list-style: none;
  text-align: center;
  margin: 0;
  padding: 0;
  top: 50%;
  align-self: center;
}

nav ul li {
  display: inline-block;
  float: left;
}

nav ul li a {
  display: block;
  padding: 15px;
  text-decoration: none;
  color: #aaa;
  font-weight: 800;
  text-transform: uppercase;
  margin: 0 10px;
}

<header class="nav-down">
  <nav class="headernav">
    <ul>
      <li><a href="#">Gig</a></li>
      <li><a href="#">ity</a></li>
      <li><a href="#">element</a></li>
    </ul>
  </nav>
</header>

Answer 3

您的代码似乎可以简单得多：

nav {
  height: 80px;
  position: fixed;
  top: 0;
  width: 100%;
  display: flex;
  justify-content: center;   /* horizontal alignment of child elements (optional) */
  background-color: bisque;
}

nav a {
  text-decoration: none;
  color: #aaa;
  font-weight: 800;
  text-transform: uppercase;
  display: flex;
  align-items: center;      /* vertical alignment of text */
  border: 1px dashed red;
}

a + a {
  margin-left: 20px;
}

<nav>
  <a href="#">Gig</a>
  <a href="#">ity</a>
  <a href="#">element</a>
</nav>

Answer 4

如果您有块的静态高度，则可以将带有无包装容器的元素居中，垂直居中对齐 inline[-block] 元素。

.vertical-container {
  height: 80px;
  border: 1px solid black;
  white-space: nowrap;
  /* this prevents vertical block to "fall out" of container */
}

.vertical-aligner {
  display: inline-block;
  vertical-align: middle;
  height: 100%;
  width: 0;
}

.vertical-content {
  display: inline-block;
  vertical-align: middle;
  border: 1px solid red;
  white-space: normal;
  /* reset white-space for content */
}

<div class="vertical-container"><span class="vertical-aligner"></span><span class="vertical-content">Text that should be vertically middle of container</span></div>

我已经相应地更新了你的小提琴：https://jsfiddle.net/w3s8cj92/2/

附：我想提供更多信息，但稍后

Answer 5

CSS替换

header {
    height: 80px;
    position: fixed;
    top: 0;
    transition: top 0.2s ease-in-out;
    width: 100%;
    display: table;
}

footer { background: #ddd;}
* { color: transparent}
nav {
    height: 100%;
  width: 100%;
  background-color: bisque;
}
nav ul {
    margin: 0;
    padding: 0;
    display: table-cell;
    vertical-align: middle;
    height: 80px;
}
nav ul li {
  display: inline-block;
    float: left;
}
nav ul li a {
  display: block;
  padding: 15px;
  text-decoration: none;
  color: #aaa;
  font-weight: 800;
  text-transform: uppercase;
  margin: 0 10px;
}