css设置元素垂直水平居中的方法

    <!--html结构-->
    <div class="box1">文本垂直水平居中</div>
    <div class="father">
        <div class="son"></div>
    </div>

方法一：

        .box1{
            width: 100%;
            height: 100px;
            background-color: #f00;
            text-align: center;
            line-height: 100px;
        }

方法二：

        .father{
            position: relative;
            width: 200px;
            height: 200px;
            background-color: #00f;
        }
        .son{
            position: absolute;
            top: 50%;
            left: 50%;
            margin-top: -25px;
            margin-left: -25px;
            width: 50px;
            height: 50px;
            background-color: #0f0;
        }

方法三：

        .father {
            position: relative;
            width: 200px;
            height: 200px;
            background-color: #f00;
        }

        .son {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%,-50%);
            width: 50%;
            height: 50%;
            background-color: yellow;
        }

方法四：

        .father {
            position: relative;
            width: 200px;
            height: 200px;
            background-color: #f00;
            display: flex;
        }

        .son {
            margin: auto;
            width: 50%;
            height: 50%;
            background-color: yellow;
        }

方法五：

        .father {
            position: relative;
            width: 200px;
            height: 200px;
            background-color: #00f;
        }

        .son {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            margin: auto;
            width: 50%;
            height: 50%;
            background-color: #0f0;
        }

方法六：

        .father {
            position: relative;
            width: 200px;
            height: 200px;
            background-color: #f00;
            display: flex;
            justify-content:center;
            align-items: center;
        }

        .son {
            width: 50%;
            height: 50%;
            background-color: yellow;
        }