css让一个div水平垂直居中方法大全

方法一：position加margin

class="wrap">
    <div class="center">div>
</div>

/**css**/
.wrap {
    width: 200px;
    height: 200px;
    background: yellow;
    position: relative;
}
.wrap .center {
    width: 100px;
    height: 100px;
    background: green;
    margin: auto;
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
}

兼容性：主流浏览器均支持，IE6不支持

方法二： diaplay:table-cell

<div class="wrap">
     <div class="center">div>
div>

/*css*/
.wrap{
    width: 200px;
    height: 200px;
    background: yellow;
    display: table-cell;
    vertical-align: middle;
    text-align: center;
}
.center{
    display: inline-block;
    vertical-align: middle;
    width: 100px;
    height: 100px;
    background: green;
}

兼容性：由于display:table-cell的原因，IE6\7不兼容

方法三：position加 transform

<div class="wrap">
    <div class="center">div>
div>

/* css */
.wrap {
    position: relative;
    background: yellow;
    width: 200px;
    height: 200px;}
 
.center {
    position: absolute;
    background: green;
    top:50%;
    left:50%;
    -webkit-transform:translate(-50%,-50%);
    transform:translate(-50%,-50%);
    width: 100px;
    height: 100px;
}

兼容性：ie9以下不支持 transform，手机端表现的比较好。

方法四：flex;align-items: center;justify-content: center

<div class="wrap">
    <div class="center">div>
div>

/* css */
.wrap {
    background: yellow;
    width: 200px;
    height: 200px;
    display: flex; 
    align-items: center; 
    justify-content: center;
}
 
.center {
    background: green;
    width: 100px;
    height: 100px;
}

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方法五：display:flex;margin:auto

<div class="wrap">
    <div class="center">div>
div>

/* css */
.wrap {
    background: yellow;
    width: 200px;
    height: 200px;
    display: flex; 
}
 
.center {
    background: green;
    width: 100px;
    height: 100px;
    margin: auto;
}

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方法六：纯position

<div class="wrap">
    <div class="center">div>
div>

/* css */
.wrap {
    background: yellow;
    width: 200px;
    height: 200px;
    position: relative;
}
/**方法一**/
.center {
    background: green;
    position: absolute;
    width: 100px;
    height: 100px;
    left: 50px;
    top: 50px; 
  
}
/**方法二**/
.center {
    background: green;
    position: absolute;
    width: 100px;
    height: 100px;
    left: 50%;
    top: 50%;
  margin-left:-50px;
  margin-top:-50px;
}

兼容性：适用于所有浏览器

方法七：兼容低版本浏览器，不固定宽高

<div class="table">
    <div class="tableCell">
        <div class="content">不固定宽高，自适应div>
    div>
div>

/*css*/
.table {
    height: 200px;/*高度值不能少*/
    width: 200px;/*宽度值不能少*/
    display: table;
    position: relative;
    float:left;
    background: yellow;
}      
 
.tableCell {
    display: table-cell;
    vertical-align: middle;
    text-align: center;        
    *position: absolute;
    padding: 10px;
    *top: 50%;
    *left: 50%;
}
.content {
    *position:relative;
    *top: -50%;
    *left: -50%;
     background: green;
}