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设置其文本的行高line-height与其父容器高度相等即可。如
<style> .test{ background-color: grey; line-height:90px; } </style> <body> <div class="test">文本垂直居中</div> </body>
效果图如下
<style> .container{ width: 500px; height: 500px; position: relative; background-color: red; } .absolute-center{ width: 50%; height: 50%; overflow: auto; margin:auto; position: absolute; top:0; left:0; bottom:0; right:0; background-color: green; } </style> <body> <div class="container"> <div class="absolute-center">垂直居中</div> </div> </body>
效果图如下:
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <style> .container{ width: 500px; height: 500px; position: relative; background-color: red; } .absolute-center{ width:100px; height: 100px; position: absolute; top:50%; margin-top:-50px; left:50%; margin-left:-50px; background-color: green; } </style> </head> <body> <div class="container"> <div class="absolute-center">垂直居中</div> </div> </body> </html>
效果图如下:
如果想让其在可视区内永远居中,则需要设置其定位为position:fixed;z-index:999;
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <style> .parent{ position: relative; height: 300px; background-color: grey; } .child{ position: absolute; top:50%; transform:translateY(-50%); background-color: green; } </style> </head> <body> <div class="parent"> <div class="child">adfadf</div> </div> </body> </html>
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <style> .parent{ display: table-cell; vertical-align: middle; background-color: grey; height: 100px; } .child{ background-color: blue; } </style> </head> <body> <div class="parent"> <div class="child">table-cell实现的居中</div> </div> </body> </html>
如果已经定位或浮动的元素仍然想用此方法来实现垂直居中,需要在其外面再加一个父盒子包起来便可实现。若要IE7支持,则需要改为<table>表格布局。
vertical-align:middle的解释是元素的中垂点与父元素的基线加1/2父元素中字母X的高度对齐。由于字符X在em框中并不是垂直居中的,且各个字体的字符X的高低位置不一致。所以,当字体大小较大时,这种差异就更明显。当font-size为0时,相当于把字符X的字体大小设置为0,于是可以实现完全的垂直居中。如下代码:
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <style> .parent{ line-height: 500px; fon-size:0; background-color: grey; width: 500px; } .child{ vertical-align: middle; } </style> </head> <body> <div class="parent"> <img src="img/shop.png" class="child"/> </div> </body> </html>
效果图如下:
新增元素设置高度为父级高度,宽度为0,且同样设置垂直居中vertical-align:middle的inline-block元素。由于两个元素之间空白被解析,所以需要在父级设置font-size:0,在子级再将font-size设置为所需值;若结构要求不严格,则可以将两个元素一行显示,则不需要设置font-size:0。代码如下:
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <style> .parent{ height: 100px; font-size:0; background-color: grey; width: 200px; } .child{ display: inline-block; font-size:20px; vertical-align: middle; background-color: blue; } .childSbling{ display: inline-block; height: 100%; vertical-align: middle; } </style> </head> <body> <div class="parent"> <div class="child">adfadf</div> <i class="childSbling"></i> </div> </body> </html>
效果图如下:
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <style> .parent{ display: flex; align-items: center; background-color: grey; height: 200px; } </style> </head> <body> <div class="parent"> <div class="child">adfadf</div> </div> </body> </html>
效果如下:
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <style> .parent{ display: flex; background-color: grey; height: 200px; } .child{ margin:auto 0; } </style> </head> <body> <div class="parent"> <div class="child">子</div> </div> </body> </html>
效果如下:
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原文地址:http://www.cnblogs.com/haoxl/p/5452236.html