CSS垂直居中和水平居中方法总结

1、单行垂直居中
 
文字在层中垂直居中vertical-align 属性是做不到的.我们这里有个比较巧妙的方法就是:设置height的高度与line-height的高度相同!
 

<div style="line-height:500px;height:500;"></div>
 

2、层水平居中
 
设置div的宽度小于父div的宽度，设置 margin:0 auto;，即可让div居中。
 

#parentdiv
 {
 width: 500px;
 }
 #childdiv {
 width: 200px;
 margin:0 auto;
 }
 

3、层中的文字水平居中
 
在childdiv的css加上text-align:center;
 

#parentdiv
 {
 width: 500px;
 }
 #childdiv {
 width: 200px;
 margin:0 auto;
 text-align:center;
 }
 

4、div层垂直居中
 

<div style="width:275px;height:375px;border: solid red;">
 <div style=" background:green;height: 375px; width: 275px; position: relative; display: table-cell; vertical-align: middle;">
      <div style=" background:red;position:static;position:absolute\9; top: 50%;">
         <div style=" background:blue;position: relative; top: -50%;">
                      51xuediannao.com         </div>
       </div>
    </div>
 </div>
 

5、div层垂直水平居中，英文超长换行
 

   <div style="float:left;width:275px;height:375px;border: solid red;">
 <div style=" height: 375px; width: 275px; position: relative; display: table-cell; vertical-align: middle;">
           <div style="position:static;position:absolute\9; top: 50%;">
            <div style="position: relative; top: -50%; text-align: center;">
               <div style="width: 85px;WORD-WRAP: break-word;TABLE-LAYOUT: fixed;word-break:break-all;margin:0 auto;">
             www.sj33.cn www.sj33.cn www.sj33.cn www.sj33.cn www.sj33.cn www.sj33.cn           </div>
                     
               </div>
           </div>
          </div>
 </div>
 

6、div垂直滚动
 <div style="width: 160px; height: 260px; overflow-y: scroll; border: 1px solid;">http://www.51xuedeiannao.com </div>
 

7、垂直居中和使用text-align水平居中
 

<div style="float:left;width:275px;height:375px;border: solid red;">
 <div style=" height: 375px; width: 275px; position: relative; display: table-cell; vertical-align: middle;">
           <div style="position:static;position:absolute\9;top: 50%;">
            <div style="position: relative; top: -50%; text-align:center;">
             <div style="width: 275px;">
                       <div style="width: 160px;WORD-WRAP: break-word;TABLE-LAYOUT: fixed;word-break:break-all;text-align:left;">
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               </div>
               </div>
                     
               </div>
           </div>
          </div>
 </div>
 

8、垂直居中和使用margin水平居中
 

    <div style="float:left;width:275px;height:375px;border: solid red;">
 <div style=" height: 375px; width: 275px; position: relative; display: table-cell; vertical-align: middle;">
           <div style="position:static;position:absolute\9; top: 50%;">
            <div style="position: relative; top: -50%; ">
            
                       <div style="margin:0 auto;width: 160px;WORD-WRAP: break-word;TABLE-LAYOUT: fixed;word-break:break-all;">
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               </div>
             
                     
               </div>
           </div>
          </div>
 </div>