最近群里这个问题比较热门,决定把我收藏的方法分享大家。在开始时,我们先看一下万能的table实现。
<!doctype html> <html lang="en"> <head> <meta charset="utf-8" /> <meta content="IE=8" http-equiv="X-UA-Compatible"/> <title>司徒正美 CSS垂直居中</title> <style type="text/css"> .container{ 500px;/*装饰*/ height:500px; background:#B9D6FF; border: 1px solid #CCC; } </style> </head> <body> <h1>垂直居中(table)</h1> <div class='container'> <table width="100%" height="100%"> <tr> <td align="center" valign="middle"> <img src="http://images.cnblogs.com/cnblogs_com/rubylouvre/205314/r_iebug.jpg" /> </td> </tr> </table> </div> </body> </html>
好了,我们看其CSS实现。凡是table能做到的,CSS都能做的,但各浏览器在CSS的差异比较大,因此要兼容它们难度很大。这涉及许多细节,各种流啊,display的表现效果与CSS hack,IE早些年搞了大堆的私有属性,这也有待我们深一步挖掘。我们先看最简单的实现,背景图片法——
背景图片法
<!doctype html> <html> <head> <title>司徒正美 CSS垂直居中</title> <style type="text/css"> .container { 500px; height:500px; line-height:500px; background:#B9D6FF url(http://images.cnblogs.com/cnblogs_com/rubylouvre/205314/r_iebug.jpg) no-repeat center center; border:1px solid #f00; text-align: center; } </style> </head> <body> <h1>垂直居中(背景图片法)</h1> <div class="container"> </div> </body> </html>
CSS表达式法
<html lang="en"> <head> <meta charset="utf-8" /> <meta content="IE=8" http-equiv="X-UA-Compatible"/> <title>司徒正美 CSS垂直居中</title> <style type="text/css"> .container{ /*IE8与标准游览器垂直对齐*/ display: table-cell; vertical-align:middle; 500px;/*装饰*/ height:500px; background:#B9D6FF; border: 1px solid #CCC; } .container img{ display:block;/*让其具备盒子模型*/ margin:0 auto; text-align:center; margin-top:expression((500 - this.height )/2);/*让IE567垂直对齐 */ } </style> </head> <body> <h1>垂直居中(CSS表达式)</h1> <div class="container"> <img src="http://images.cnblogs.com/cnblogs_com/rubylouvre/205314/r_iebug.jpg" /> </div> </body> </html>
绝对定位法
<!doctype html> <html lang="en"> <head> <meta charset="utf-8" /> <meta content="IE=8" http-equiv="X-UA-Compatible"/> <title>司徒正美 CSS垂直居中</title> <style type="text/css"> div { /*IE8与标准游览器垂直对齐*/ display:table-cell; vertical-align:middle; overflow:hidden; position:relative; text-align:center; 500px;/*装饰*/ height:500px; border:1px solid #ccc; background:#B9D6FF; } div p { +position:absolute; top:50% } img { +position:relative; top:-50%; left:-50%; } </style> </head> <body> <h1>垂直居中(绝对定位)</h1> <div class="container"> <p> <img src="http://images.cnblogs.com/cnblogs_com/rubylouvre/205314/r_iebug.jpg" /> </p> </div> </body> </html>
display:inline-block法
<!doctype html> <html lang="en"> <head> <meta charset="utf-8" /> <meta content="IE=8" http-equiv="X-UA-Compatible"/> <title>司徒正美 CSS垂直居中</title> <style type="text/css"> div { display:table-cell; vertical-align:middle; text-align:center; 500px; height:500px; background:#B9D6FF; border: 1px solid #CCC; } </style> <!--[if IE]> <style type="text/css"> i { display:inline-block; height:100%; vertical-align:middle } img { vertical-align:middle } </style> <![endif]--> </head> <body> <h1>垂直居中(inline-block法)</h1> <div class="container"> <i></i> <img src="http://images.cnblogs.com/cnblogs_com/rubylouvre/205314/r_iebug.jpg" /> </div> </body> </html>
writing-mode法
<!doctype html> <html lang="en"> <head> <meta charset="utf-8" /> <meta content="IE=8" http-equiv="X-UA-Compatible"/> <title>司徒正美 CSS垂直居中</title> <style type="text/css"> div{ 500px; height:500px; line-height:500px; text-align:center; background:#B9D6FF; border:1px solid #f00; } div span{ height:100%\9; writing-mode:tb-rl\9; } div img{ vertical-align:middle } </style> </head> <body> <h1>垂直居中(writing-mode法)</h1> <div class="container"> <span> <img src="http://images.cnblogs.com/cnblogs_com/rubylouvre/205314/r_iebug.jpg" /> </span> </div> </body> </html>
记得淘宝也搞一个font-size法,但我觉得上下差异比较大,就不收录了。怿飞的博客亦提到过一韩国人有个巧妙的实现,但日久链接失效了,谁收藏了也请提供一下。
新发现的逆天方法,使用button 标签做容器