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  • div垂直居中

    转自:https://www.cnblogs.com/mihoutaoguniang/p/6124299.html

    小果今天要实现这样的效果:单纯css样式,实现body下子集的水平垂直居中。

    body内容:

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    <body>
        <div class="div1">
            <div class="div2"></div>
        </div>
    </body>

    效果:

    通过一系列的尝试,实现了四种方法,惊奇的发现,其中三个是用position:absolute实现的:(div大小确定)

    1.原理:position: absolute;top: 50%;left: 50%;margin-top: -50px;margin-left: -50px;

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    <style type="text/css">
      html,body{
        height:100%;
        width:100%;
        backgroundblack;
        }
      .div1{
        height100px;
        width100px;
        positionabsolute;
        top50%;
        left50%;
        margin-top-50px;
        margin-left-50px;
        background: pink;
        }
      .div2{
        height10px;
        width10px;
        margin-top90px;
        background: lightblue;
        }
    </style>

    2.原理:margin: auto;position: absolute;top: 0;right:0;bottom: 0;left: 0;

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    <style type="text/css">
      html,body{
        height:100%;
        width:100%;
        backgroundblack;
        }
      .div1{
        height100px;
        width100px;
        marginauto;
        positionabsolute;
        top0;
        right:0;
        bottom0;
        left0;
        background: pink;
        }
      .div2{
        height10px;
        width10px;
        margin-top90px;
        background: lightblue;
        }
    </style>

    3.原理:transform:translate(-100px,-100px);position: absolute;top: 50%;left: 50%;

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    <style type="text/css">
      html,body{
        height:100%;
        width:100%;
        backgroundblack;
        }
      .div1{
        height100px;
        width100px;
        marginauto;
        positionabsolute;
        top50%;
        left50%;
        background: pink;
        -webkit-transform:translate(-100px,-100px);
        transform:translate(-100px,-100px);
        }
      .div2{
        height10px;
        width10px;
        margin-top90%;
        background: lightblue;
        }
    </style>

    4.原理:display:flex;justify-content:center;align-items:center;

    body是这样子的:

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    <body>
        <div class="div1"></div>
        <div class="div2"></div>
    </body>

    css:

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    <style type="text/css">
      html,body{
        height:100%;
        width:100%;
        backgroundblack;
        display: flex;
        justify-contentcenter;
        align-items: center;
        }
      .div1{
        height100px;
        width100px;
        background: pink;  
        }
      .div2{
        height10px;
        width10px;
        positionabsolute;
        left50%;
        top50%;
        margin-top40px;
        margin-left-50px;
        background: lightblue;
        }
    </style>

    以上是div1的大小确定的居中方法,那如果大小不知道呢?小果使用了paddingO(∩_∩)O

    代码君:(display: table-cell必不可少啊)

     body内容:

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    <body>
        <div class="div1">
            <div class="div2"></div>
        </div>
    </body>

    css内容:

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    <style type="text/css">
      html,body{
        height:100%;
        width:100%;
        backgroundblack;
        }
      .div1{
        padding50px;
        displaytable-cell;
        positionabsolute;
        top50%;
        right:50%;
        bottom50%;
        left50%;
        background: pink;
        marginauto;
        }
      .div2{
        padding10px;
        margin-top30px;
        margin-left-50px;
        background: lightblue;
        }
    </style>

     然而,效果是这样的:

    好了,整理完毕。如果果果大军们有什么意见,或者更好的方法,欢迎交流,随之奉陪哈,谢谢!

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  • 原文地址:https://www.cnblogs.com/baaigeini/p/10030345.html
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