CSS 居中

一、position元素

第一种:通过 position + translateY

 a:水平及垂直同时居中

 1 .wrapper {
 2     position: relative;
 3     width: 300px;
 4     height: 300px;
 5     border: solid 2px red;
 6     border-radius: 5px;
 7 }
 8 
 9 .wrapper .content{
10     position: absolute;
11     top: 50%;
12     left: 50%;
13     transform: translateX(-50%) translateY(-50%);
14     height: 100px;
15     width: 100px;
16     border: solid 2px blue;
17     border-radius: 5px;
18 }

 b:水平居中

 1 .wrapper {
 2     position: relative;
 3     width: 300px;
 4     height: 300px;
 5     border: solid 2px red;
 6     border-radius: 5px;
 7 }
 8 
 9 .wrapper .content{
10     position: absolute;
11     left: 50%;
12     transform: translateX(-50%);
13     height: 100px;
14     width: 100px;
15     border: solid 2px blue;
16     border-radius: 5px;
17 }

c:垂直居中

 1 .wrapper {
 2     position: relative;
 3     width: 300px;
 4     height: 300px;
 5     border: solid 2px red;
 6     border-radius: 5px;
 7 }
 8 
 9 .wrapper .content{
10     position: absolute;
11     top: 50%;
12     transform: translateY(-50%);
13     height: 100px;
14     width: 100px;
15     border: solid 2px blue;
16     border-radius: 5px;
17 }

 

 第二种:通过 position + margin

a:水平及垂直同时居中

 1 .wrapper {
 2     position: relative;
 3     width: 300px;
 4     height: 300px;
 5     border: solid 2px red;
 6     border-radius: 5px;
 7 }
 8 
 9 .wrapper .content{
10     position: absolute;
11     top: 50%;
12     margin-top: -50px;
13     left: 50%;
14     margin-left: -50px;
15     height: 100px;
16     width: 100px;
17     border: solid 2px blue;
18     border-radius: 5px;
19 }

 b:水平居中 

 1 .wrapper {
 2     position: relative;
 3     width: 300px;
 4     height: 300px;
 5     border: solid 2px red;
 6     border-radius: 5px;
 7 }
 8 
 9 .wrapper .content{
10     position: absolute;
11     left: 50%;
12 margin-left: -50px; 13 height: 100px; 14 width: 100px; 15 border: solid 2px blue; 16 border-radius: 5px; 17 }

c:垂直居中

 1 .wrapper {
 2     position: relative;
 3     width: 300px;
 4     height: 300px;
 5     border: solid 2px red;
 6     border-radius: 5px;
 7 }
 8 
 9 .wrapper .content{
10     position: absolute;
11     top: 50%;
12     margin-top: -50px;
13     height: 100px;
14     width: 100px;
15     border: solid 2px blue;
16     border-radius: 5px;
17 }

 

二、元素内部信息

第一种:元素内容没有标签,只有内容,这样垂直设置height和line-height一样就可以了,水平设置text-align:center就可以

1  .wrapper{
2     height: 50px;
3     line-height: 50px;
4     text-align: center;     
5  }

 

第二种:元素内部元素居中,设置如下:

.wrapper-table{
    display: table-cell;
    height: 100px;
    width: 100px;
    vertical-align: middle;
    text-align: center;
    border: solid 2px yellow;
}

.wrapper-table .wrapper-table-cell{
    border: solid 2px #009900;
}

 

 

 

posted @ 2018-01-29 22:21  宙冰  阅读(94)  评论(0编辑  收藏  举报