元素水平垂直居中(css/css3)

一、css实现

1、margin

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        .div1{
            height: 500px;
            background: #ff0000;
            overflow: hidden;/*解决外边距合并*/
        }
        .div2{
            width: 200px;
            height: 200px;
            background: #ffff00;
            margin:150px auto;/*设置宽才有用*/
        }
    </style>
</head>
<body>
    <div class="div1">
        <div class="div2"></div>
    </div>
</body>
</html>

2、定位+margin/translate(x,y)

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        .div1{
            height: 500px;
            background: #ff0000;
            position: relative;
        }
        .div2{
            width: 200px;
            height: 200px;
            background: #ffff00;
            position: absolute;
            left:50%;/**/
            top:50%;
            /*margin-left:-100px;*/
            /*margin-top:-100px;*/
            /*知道宽高  配合position:absolute;left:50%;top:50%;使用*/
            transform: translateX(-50%) translateY(-50%) ;
            /*不知道宽高时 配合position:absolute;left:50%;top:50%;使用*/
        }
    </style>
</head>
<body>
    <div class="div1">
        <div class="div2"></div>
    </div>
</body>
</html>

二、css3弹性盒模型实现

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <style>
        .parent{
            width: 500px;
            height: 500px;
            background: #ff0000;
            display: -webkit-flex;/*配合使用*/
            /*子元素水平对齐*/
            -webkit-justify-content: center;
            /*子元素垂直对齐*/
            -webkit-align-items: center;
        }
        .child{
            width: 100px;
            height: 100px;
            background: #0f0;
        }
    </style>
</head>
<body>
<div class="parent">
    <div class="child"></div>
</div>
</body>
</html>

猜你喜欢

转载自blog.csdn.net/qq_38912819/article/details/80596493
今日推荐