2-8 代码实现效果，请老师帮忙检查一下，谢谢!

来源：2-8 过渡效果实战课（1）

呜蜩的呀

2022-07-30 19:20:45

相关代码：

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>照片下方文字淡入动画添加</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        .box {
            width: 1200px;
            height: 600px;
            border: 1px solid #000;
            margin: 20px auto;
            padding: 20px;
            /* 这里添加overflow：hidden的用处是为了形成BFC吗？ */
            overflow: hidden;
        }

        .box ul {
            list-style: none;
        }

        .box li {
            float: left;
            width: 360px;
            height: 200px;
            /* 子绝父相，定位要添加在子元素和子元素所属于的父元素身上 */
            position: relative;
        }

        .box li img {
            width: 360px;
            height: 200px;
        }

        .box .info {
            width: 340px;
            height: 40px;
            line-height: 40px;
            font-size: 24px;
            padding-left: 20px;
            background: rgba(0,0,0,0.4);
            color: white;
            position: absolute;
            bottom: 10px;
            left: 0px;
            /* 给该盒子设置透明度为0，opacity设置的是整体的透明度;
                不可以用display属性，因为transition属性只能用于数值类型的属性 */
            opacity: 0;

            /* 淡入效果实现 */
            transition: opacity 2s linear 0s;
        }

        /* 此时这样的设置是点击然后全部都淡入，如果使用nth-child就可以实现分别选择然后出现文字效果是吗？ */
        .box:hover .info {
            opacity: 1;
        }
    </style>
</head>

<body>
    <div class="box">
        <ul>
            <li>
                <img src="../作业素材/images/beijing/1.jpg" alt="beijing">
                <div class="info">北京鸟巢</div>
            </li>
            <li>
                <img src="../作业素材/images/beijing/2.jpg" alt="beijing">
                <div class="info">十七拱桥</div>
            </li>
            <li>
                <img src="../作业素材/images/beijing/3.jpg" alt="beijing">
                <div class="info">故宫天坛</div>
            </li>
        </ul>
    </div>
</body>

</html>

写回答

1回答