<!DOCTYPE html>
<html>
<head>
<meta charset=”UTF-8″>
<title></title>
<style type=”text/css”>
body,div,span{
margin:0px;
padding:0px;
}
#thewhole{
display:flex;
display: -webkit-flex;
width:99%;
height:99%;
align-items:center;
justify-content:center;
border: 1px solid red;
position:absolute;
}
#box{
display: flex;
display: -webkit-flex;
border: 1px solid #0000FF;
height: 200px;
width: 400px;
align-items:center;
justify-content:center;
}
.item{
width: 50px;
height: 40px;
border: 1px solid #00C1B3;
}
</style>
</head>
<body>
<div id=”thewhole”>
<div>
<div id=”box”>
<div class=”item”>1</div>
<div class=”item”>2</div>
<div class=”item”>3</div>
<div class=”item”>4</div>
<div class=”item”>5</div>
<div class=”item”>加了position：absolute才能垂直居中</div>
</div>
<div id=”div2″>使用了flex就不是独占了，如果想box独占，则在box外面在扩一个div，这样box和div2都可以占一行了，否则就会造成这两个div四1行</div>
</div>
</div>
</body>
</html>