css如何让子元素在父元素中水平垂直居中

方法一： display:flex

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="../css_com/reset.css">
    <style>
        .parents{
            /*添加部分*/
            display: flex;
            align-items: center;
            justify-content: center;
            
            margin:0 auto;
            width: 600px;
            height: 600px;
            background-color: #4eff5e;
        }
        .son{
            width: 300px;
            height: 300px;
            background-color: #ff4236;
        }
    </style>
</head>
<body>
    <div class="parents">
        <div class="son"></div>
    </div>
</body>
</html>

方法二：display:table-cel

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="../css_com/reset.css">
    <style>
        .parents{
            /*添加部分*/
            display: table-cell;
            vertical-align: middle;

            margin:0 auto;
            width: 600px;
            height: 600px;
            background-color: #4eff5e;
        }
        .son{
            /*添加部分*/
            margin: auto;
            
            width: 300px;
            height: 300px;
            background-color: #ff4236;
        }
    </style>
</head>
<body>
    <div class="parents">
        <div class="son"></div>
    </div>
</body>
</html>

方法三：绝对定位和0

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="../css_com/reset.css">
    <style>
        .parents{
            /*添加部分*/
            position: relative;

            margin:0 auto;
            width: 600px;
            height: 600px;
            background-color: #4eff5e;
        }
        .son{
            /*添加部分*/
            margin: auto;
            position: absolute;
            top: 0;
            left: 0;
            bottom: 0;
            right: 0;

            width: 300px;
            height: 300px;
            background-color: #ff4236;
        }
    </style>
</head>
<body>
    <div class="parents">
        <div class="son"></div>
    </div>
</body>
</html>

方法四：负边距

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="../css_com/reset.css">
    <style>
        .parents{
            /*添加部分*/
            position: relative;

            margin:0 auto;
            width: 600px;
            height: 600px;
            background-color: #4eff5e;
        }
        .son{
            /*添加部分*/
            position: absolute;
            top: 50%;
            left: 50%;
            margin-left: -150px;
            margin-top: -150px;

            width: 300px;
            height: 300px;
            background-color: #ff4236;
        }
    </style>
</head>
<body>
    <div class="parents">
        <div class="son"></div>
    </div>
</body>
</html>

方法四：css3属性中的平移

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="../css_com/reset.css">
    <style>
        .parents{
            /*添加部分*/
            position: relative;

            margin:0 auto;
            width: 600px;
            height: 600px;
            background-color: #4eff5e;
        }
        .son{
            /*添加部分*/
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%,-50%);

            width: 300px;
            height: 300px;
            background-color: #ff4236;
        }
    </style>
</head>
<body>
    <div class="parents">
        <div class="son"></div>
    </div>
</body>
</html>

目前总结这四种方法，实际使用的时候根据实际情况选取不同的方法

原文出处：https://www.cnblogs.com/SpringAndMoon/p/12105674.html

来源：oschina

链接：https://my.oschina.net/u/4360182/blog/3243585

标签

FLEX