利用CSS进行元素的水平居中,比较简单,行级元素设置其父元素的text-align center,块级元素设置其本身的left 和 right margins为auto即可。本文收集了六种利用css进行元素的垂直居中的方法,每一种适用于不同的情况,在实际的使用过程中选择某一种方法即可。
Line-Height Method
试用:单行文本垂直居中,demo
代码:
html
1 2 3 | <div id="parent"> <div id="child">Text here</div> </div> |
<div id="parent"> <div id="child">Text here</div> </div>
css
1 2 3 | #child { line-height: 200px; } |
#child { line-height: 200px; }
垂直居中一张图片,代码如下
html
1 2 3 | <div id="parent"> <img src="image.png" alt="" /> </div> |
<div id="parent"> <img src="image.png" alt="" /> </div>
css
1 2 3 4 5 6 | #parent { line-height: 200px; } #parent img { vertical-align: middle; } |
#parent { line-height: 200px; } #parent img { vertical-align: middle; }
CSS Table Method
适用:通用,demo
代码:
html
1 2 3 | <div id="parent"> <div id="child">Content here</div> </div> |
<div id="parent"> <div id="child">Content here</div> </div>
css
1 2 3 4 5 | #parent {display: table;} #child { display: table-cell; vertical-align: middle; } |
#parent {display: table;} #child { display: table-cell; vertical-align: middle; }
低版本 IE fix bug:
1 2 3 | #child { display: inline-block; } |
#child { display: inline-block; }
Absolute Positioning and Negative Margin
适用:块级元素,demo
代码:
html
1 2 3 | <div id="parent"> <div id="child">Content here</div> </div> |
<div id="parent"> <div id="child">Content here</div> </div>
css
1 2 3 4 5 6 7 8 9 | #parent {position: relative;} #child { position: absolute; top: 50%; left: 50%; height: 30%; width: 50%; margin: -15% 0 0 -25%; } |
#parent {position: relative;} #child { position: absolute; top: 50%; left: 50%; height: 30%; width: 50%; margin: -15% 0 0 -25%; }
Absolute Positioning and Stretching
适用:通用,但在IE版本低于7时不能正常工作,demo
代码:
html
1 2 3 | <div id="parent"> <div id="child">Content here</div> </div> |
<div id="parent"> <div id="child">Content here</div> </div>
css
1 2 3 4 5 6 7 8 9 10 11 | #parent {position: relative;} #child { position: absolute; top: 0; bottom: 0; left: 0; right: 0; width: 50%; height: 30%; margin: auto; } |
#parent {position: relative;} #child { position: absolute; top: 0; bottom: 0; left: 0; right: 0; width: 50%; height: 30%; margin: auto; }
Equal Top and Bottom Padding
适用:通用,demo
代码:
html
1 2 3 | <div id="parent"> <div id="child">Content here</div> </div> |
<div id="parent"> <div id="child">Content here</div> </div>
css
1 2 3 4 5 6 | #parent { padding: 5% 0; } #child { padding: 10% 0; } |
#parent { padding: 5% 0; } #child { padding: 10% 0; }
Floater Div
适用:通用,demo
代码:
html
1 2 3 4 | <div id="parent"> <div id="floater"></div> <div id="child">Content here</div> </div> |
<div id="parent"> <div id="floater"></div> <div id="child">Content here</div> </div>
css
1 2 3 4 5 6 7 8 9 10 11 | #parent {height: 250px;} #floater { float: left; height: 50%; width: 100%; margin-bottom: -50px; } #child { clear: both; height: 100px; } |
#parent {height: 250px;} #floater { float: left; height: 50%; width: 100%; margin-bottom: -50px; } #child { clear: both; height: 100px; }
以上就是六种方法,可以在实际的使用过程中合理选择,参考文章《vertical-centering》。