【页面架构】垂直居中

1.display: table-cell + vertical-align: middle

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>垂直居中</title>
<link rel="stylesheet" type="text/css" href="demo.css">
<style type="text/css">
    body{margin:20px;}
    .parent{width:4em;height:500px;}
    .child{width:100%;}
    
    .parent{
        display: table-cell;
        vertical-align: middle;
    }
</style>
</head>
<body>
<div class="parent">
    <div class="child">DEMO</div>
</div>
</body>
</html>

2.position + transform

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>垂直居中</title>
<link rel="stylesheet" type="text/css" href="demo.css">
<style type="text/css">
    body{margin:20px;}
    .parent{width:4em;height:500px;}
    .child{width:100%;}

    .parent{
        position: relative;
    }
    .child{
        position: absolute;
        top: 50%;
        transform: translateY(-50%);
    }
</style>
</head>
<body>
<div class="parent">
    <div class="child">DEMO</div>
</div>
</body>
</html>

3.display: flex + align-items: center

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>垂直居中</title>
<link rel="stylesheet" type="text/css" href="demo.css">
<style type="text/css">
    body{margin:20px;}
    .parent{width:4em;height:500px;}
    .child{width:100%;}

    .parent{
        display: flex;
        align-items: center;
    }
</style>
</head>
<body>
<div class="parent">
    <div class="child">DEMO</div>
</div>
</body>
</html>

 附录：demoe.css

html,body,h1,h2,h3,h4,h5,h6,div,dl,dt,dd,ul,ol,li,p,blockquote,pre,hr,figure,table,caption,th,td,form,fieldset,legend,input,button,textarea,menu{margin:0;padding:0;}
header,footer,section,article,aside,nav,hgroup,address,figure,figcaption,menu,details{display:block;}
table{border-collapse:collapse;border-spacing:0;}
caption,th{text-align:left;font-weight:normal;}
html,body,fieldset,img,iframe,abbr{border:0;}
i,cite,em,var,address,dfn{font-style:normal;}
[hidefocus],summary{outline:0;}
li{list-style:none;}
h1,h2,h3,h4,h5,h6,small{font-size:100%;}
sup,sub{font-size:83%;}
pre,code,kbd,samp{font-family:inherit;}
q:before,q:after{content:none;}
textarea{overflow:auto;resize:none;}
label,summary{cursor:default;}
a,button{cursor:pointer;}
h1,h2,h3,h4,h5,h6,em,strong,b{font-weight:normal;}
del,ins,u,s,a,a:hover{text-decoration:none;}
body,textarea,input,button,select,keygen,legend{font:30px/1.5 'microsoft yahei';color:#333;outline:0;}
body{background:#fff;}
a,a:hover{color:#333;}
.parent{background:#ddd;}
.child{background:#666;color:#fff;}

 

posted @ 2016-11-21 09:07  朱两边  阅读(265)  评论(0)  编辑  收藏  举报