我想知道为什么我的 id="subnavigation" 不会垂直居中，我使用的是 top: xxpx; 但由于大多数显示器都不同，所以我有让它在每台显示器的垂直中心。
我尝试使用:
justify-content: center对齐元素:居中行高:正常vertical align-middle& alsotop: 50%,
但它不会移动到正确的位置，有什么建议吗？
HTML:
<!DOCTYPE html>
<html>
<head>
<title>FootDiver!</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="style/style.css" type="text/css" rel="stylesheet">
<link href="https://fonts.googleapis.com/css?family=Source+Sans+Pro"
rel="stylesheet">
<link href="https://fonts.googleapis.com/css?family=Shadows+Into+Light"
rel="stylesheet">
</head>
<body>
<header>
<nav id="mainnavigation">
<ul>
<li><a href="">Startseite</a></li>
<li><a href="">Über uns</a></li>
<li><a href="">Join Us!</a>
<ul>
<li><a href="">LogIn</a></li>
<li><a href="">Registrierung</a></li>
</ul>
</li>
<li><a href="">Forum</a></li>
<li><a href="">FAQ</a></li>
<li><a href="">Newsletter</a></li>
</ul>
</nav>
</header>
<div id="subnavigation">
<nav id="sub">
<ul>
<li><a href="">Olympia</a></li>
<li><a href="">Beef&Beats</a></li>
<li><a href="">Gantero</a></li>
<li><a href="">La Roma</a></li>
<li><a href="">Wok Paradis</a></li>
</ul>
</nav>
</div>
<footer>
<nav id="foot">
<ul>
<li><a href="">Impressum</a></li>
<li><a href="">Datenschutz</a></li>
<li><a href="">AGB</a></li>
<li><a href="">Kontakt</a></li>
<li><a href="">Social Media</a></li>
<li><a href="">Intern</a></li>
</ul>
</nav>
</footer>
<div id="main">
<h1>Herzlich Wilkommen!</h1>
</div>
</body>
</html>
CSS:(从第 95 行到第 116 行)
body, html {
background: #F4A460;
margin: 0;
padding: 0;
font-size: 62.5%;
}
@media screen and (min-width: 1200px) {
html {
font-size: 63%;
}
}
header {
background: #8A4B08;
position: fixed;
top: 0;
width: 100%;
text-align: center;
transition: 200ms all;
height: 7rem;
}
header nav#normal {
color: #000000;
display: inline-block;
}
header nav#normal ul {
margin: 0;
padding: 0;
float: left;
list-style: none;
position: relative;
transition: all 300ms;
}
header nav#normal ul li {
margin: 0;
padding: 0;
float: left;
list-style: none;
position: relative;
transition: all 300ms;
}
header nav#normal ul li a {
display: inline-block;
padding: 2.17rem;
float: left;
min-width: 12rem;
text-align: center;
font-size: 2rem;
color: #000000;
margin: 0 1px 0 0;
text-decoration: none;
background: #deb887;
font-weight: 300;
transition: all 300ms;
font-family: 'Source Sans Pro', sans-serif;
}
header nav#normal ul li:hover > a {
background: #FFD39B;
}
header nav#normal ul li ul {
overflow: hidden;
position: absolute;
top: 100%;
left: 0;
width: 100%;
transition: 300ms all;
max-height: 0;
}
header nav#normal ul li:hover > ul {
max-height: 900px;
}
header nav#normal ul li ul li {
border-bottom: 1px solid #8A4B08;
}
div#subnavigation {
background: #8A4B08;
position: fixed;
top: 0;
width: 166px;
text-align: center;
transition: 200ms all;
height: 1200px;
}
div#subnavigation nav#sub {
display: inline-block;
}
div#subnavigation nav#sub ul {
margin: auto;
padding: 0;
float: left;
list-style: none;
position: relative;
top: 375px;
transition: all 300ms;
}
div#subnavigation nav#sub ul li {
margin: 0;
padding: 0;
float: left;
list-style: none;
position: relative;
transition: all 300ms;
}
div#subnavigation nav#sub ul li a {
display: inline-block;
padding: 2.17rem;
float: left;
min-width: 12rem;
text-align: center;
font-size: 2rem;
color: #000000;
margin: 0 1px 0 0;
text-decoration: none;
background: #deb887;
font-weight: 300;
transition: all 300ms;
font-family: 'Source Sans Pro', sans-serif;
border-bottom: 1px solid #8A4B08;
vertical-align: middle;
}
div#subnavigation nav#sub ul li:hover > a {
background: #FFD39B;
}
footer {
position: fixed;
right: 0;
bottom: 0;
left: 0;
height: 7rem;
background-color: #8A4B08;
text-align: center;
}
footer nav#foot {
color: #000000;
display: inline-block;
}
footer nav#foot ul {
margin: 0;
padding: 0;
float: left;
list-style: none;
position: relative;
transition: all 300ms;
}
footer nav#foot ul li {
margin: 0;
padding: 0;
float: left;
list-style: none;
position: relative;
transition: all 300ms;
}
footer nav#foot ul li a {
display: inline-block;
padding: 2.17rem;
float: left;
min-width: 12rem;
text-align: center;
font-size: 2rem;
color: #000000;
margin: 0 1px 0 0;
text-decoration: none;
background: #deb887;
font-weight: 300;
transition: all 300ms;
font-family: 'Source Sans Pro', sans-serif;
}
footer nav#foot ul li:hover > a {
background: #FFD39B;
}
div#main {
text-align: left;
margin-left: 25rem;
margin-top: 15rem;
}
div#main h1 {
font-size: 6rem;
font-family: 'Shadows Into Light', cursive;
}
最佳答案
尝试添加
display: flex;
align-items: center;
到要垂直居中的元素的父元素。 justify-content: center 仅在您使用 flex
关于html - CSS 垂直居中与 ul/li，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/47618573/