无固定高度的div垂直居中

比眉伴天荒 2022-07-26 00:24 187阅读 0赞

#### **1、无固定高度的div垂直居中 – CSS** ####

实现效果图如下：

![这里写图片描述][20160405144623489]

代码附上：

<!DOCTYPE html>
    <html>
    
        <head>
            <meta charset="utf-8" />
            <meta name="viewport" content="width=device-width,user-scalable=0">
            <meta name="apple-mobile-web-app-capable" content="yes">
            <meta name="apple-mobile-web-app-status-bar-style" content="black">
        </head>
    
        <body>
            
            <div style="position:relative;width:100%;height:450px;border:1px solid #888">方法1
                <div class="modal">
                    <div class="modal-header">弹出窗标题</div>
                    <div class="modal-body">
                        .modal类中的position: absolute;表示现对于父类元素height:450px;来居中的
                        .modal类中的position: fixed;表示现对于body来居中的
                    </div>
                </div>
            </div>
    
            <style type="text/css"> .modal-header { padding: 10px 20px; text-align: center; background: rgba(0, 0, 0, .25); color: #fff; } .modal-body { padding: 20px; background: #fff; } .modal { overflow-y: auto; max-height: 95%; font-size: 16px; z-index: 103; border-radius: 5px; background: #ffffff; width: 80%; border: 1px solid #e5e5e5; color: #333; display: block; box-shadow: 0 0 3px rgba(0, 0, 0, .1); /**主要代码*/ position: absolute; top: 50%; left: 50%; -webkit-transform: translate(-50%, -50%); transform: translate(-50%, -50%); } </style>
            
        </body>
    
    </html>

--------------------

#### **2、CSS3垂直居中** ####

section {
        display: flex;
        display: -webkit-flex;
        display: -webkit-box;
    }
    
    section div {
        border: 1px solid #dddddd;
        height: 200px;
        margin-right: 20px;
        width: 200px;
        border-radius: 5px;
        cursor: pointer;
        box-shadow: 5px 4px 13px -1px #8e8e8e;
        text-align: center;
    
        display: flex;
        justify-content: center;
        align-items: center;
    
    }
    
    <section>
        <div>1</div>
        <div>2</div>
        <div>3</div>
        <div>4</div>
        <div>5</div>
    </section>

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[20160405144623489]: /images/20220724/70e133949aa843089749cdda8d007fea.png