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带你玩转CSS垂直水平居中(css实现水平垂直居中的几种方法)

对于前端程序员,你掌握了几种垂直水平居中的方法,现在带你看一看,喜欢的朋友记得点赞加关注,我会定时更新程序员的世界。

1、flex布局

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title></title>
        <meta name="viewport" content="width=device-width, initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no">
    </head>
    <style>
        #container {
            margin: 10px;
            border: 1px solid red;
            height: 100vh;
            display: -webkit-flex;
            display: flex;
            /* 关键属性 */
            align-items: center;
            /* 垂直居中 */
            justify-content: center
                /* 水平居中 */
        }
        .item {
            width: 200px;
            height: 200px;
            border: 1px solid lightpink;
            margin: 0 auto;
        }
        img {
            width: 100%;
            height: 100%;
        }
    </style>
    <body>
        <div id="container">
            <div class="item">
                <img src="img/avter.jpg" />
            </div>
        </div>
    </body>
</html>


2、 margin+ position:absolute布局

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title></title>
        <meta name="viewport" content="width=device-width, initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no">
    </head>
    <style>
        #container {
            border: 1px solid red;
            height: 100vh;
            position: relative;
        }
        .item {
              position: absolute;
              left: 0;
              right: 0;
              top: 0;
              bottom: 0;
              width: 200px;
              height: 200px;
              margin: auto;
              border: 1px solid lightpink;
        }
        img {
            width: 100%;
            height: 100%;
        }
    </style>
    <body>
        <div id="container">
            <div class="item">
                <img src="img/avter.jpg" />
            </div>
        </div>
    </body>
</html>

3.transform + absolute

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title></title>
        <meta name="viewport" content="width=device-width, initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no">
    </head>
    <style>
        #container {
            border: 1px solid red;
            height: 100vh;
            position: relative;
        }
        .item {
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            border: 1px solid lightpink;
        }
        img {
            width: 100%;
            height: 100%;
        }
    </style>
    <body>
        <div id="container">
            <div class="item">
                <img src="img/avter.jpg" />
            </div>
        </div>
    </body>
</html>

4. absolute+margin负值

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title></title>
        <meta name="viewport" content="width=device-width, initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no">
    </head>
    <style>
        #container {
            border: 1px solid red;
            height: 100vh;
            position: relative;
        }
        .item {
            position: absolute;
            left: 50%;
            top: 50%;
            width: 200px;
            height: 200px;
            margin-top: -100px;
            margin-left: -100px;
            border: 1px solid lightpink;
        }
        img {
            width: 100%;
            height: 100%;
        }
    </style>
    <body>
        <div id="container">
            <div class="item">
                <img src="img/avter.jpg" />
            </div>
        </div>
    </body>
</html>

5. absolute + calc

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title></title>
        <meta name="viewport" content="width=device-width, initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no">
    </head>
    <style>
        #container {
            border: 1px solid red;
            height: 100vh;
            position: relative;
            text-align: center;
        }
        .item {
            position: absolute;
            border: 1px solid green;
            width: 200px;
            height: 200px;
            left: calc(50% - 100px);
            top: calc(50% - 100px);
        }
        img {
            width: 100%;
            height: 100%;
        }
    </style>
    <body>
        <div id="container">
            <div class="item">
                <img src="img/avter.jpg" />
            </div>
        </div>
    </body>
</html>

6. line-height + vertical-align

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title></title>
        <meta name="viewport" content="width=device-width, initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no">
    </head>
    <style>
        #container {
            border: 1px solid red;
            height: 100vh;
            text-align: center;
            line-height: 100vh;
        }
        .item {
            display: inline-block;
            line-height: 1.5;
            border: 1px solid green;
            vertical-align: middle;
        }
        img {
            width: 100%;
            height: 100%;
        }
    </style>
    <body>
        <div id="container">
            <div class="item">
                <img src="img/avter.jpg" />
            </div>
        </div>
    </body>
</html>

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