2-19 课上代码实现效果，请老师帮忙检查一下有无失误，谢谢

来源：2-19 动画效果实战课

呜蜩的呀

2022-08-01 18:29:40

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>Document</title>

    <style>
        div {
            width: 500px;
            height: 600px;
            border: 1px solid #000;
            margin: 40px auto;
            background-color: rgba(0, 0, 0, 0.265);
            position: relative;
        }

        .box img {
            position: absolute;
        }

        .box img.dengpao {
            width: 193px;
            height: 267px;
            top: 50%;
            margin-top: -133.5px;
            left: 50%;
            margin-left: -96.5px;
        }

        .box img.dengg {
            width: 343px;
            height: 256px;
            top: 100px;
            left: 75px;

            /* 调用动画，infinite表示动画永不停止，alternate表示动画循环进行 */
            animation: twinkle .8s linear 0s infinite alternate;
        }

        /* 问题：当有两个对象时，动画效果应该写在那个对象上面？还是说两个对象都要写上？ */

        /* 定义灯泡闪烁的动画 */
        /* opacity的属性值是只有0或者1吗？透明或者不透明？还是0~1之间的范围值？大于1的数值会是什么反应？ */
        @keyframes twinkle {
            from {
                opacity: 0;
            }

            to {
                opacity: 1;
            }
        }

        /* 火箭宇宙穿梭效果 */
        .huojian {
            width: 250px;
            height: 220px;
            top: 50%;
            margin-top: -110px;
            left: 50%;
            margin-left: -125px;
            opacity: 1;

            /* 调用动画效果并且永不停止循环反复 */
            animation: move .8s linear 0s infinite alternate;
        }

        /* 定义背景的线条 */
        .bgline {
            width: 2px;
            height: 126px;
            background-color: aquamarine;
            border: none;
            transform: rotate(45deg);

            /* opacity: 0; */

            position: absolute;
            top: -100px;
            left: 400px;

            /* 调用线条运动的动画 */
            animation: linemove .925s ease 0s infinite;
        }

        .no1 {
            top: 100px;
            left: 350px;
            animation: linemove .925s ease .3s infinite;
        }

        .no2 {
            top: 160px;
            left: 240px;
            animation: linemove .925s ease .6s infinite;
        }

        .no3 {
            top: 270px;
            left: 440px;
            animation: linemove .925s ease .97s infinite;
        }

        /* /定义背景线条的运动 */
        @keyframes linemove {
            0% {
                transform: rotate(45deg) translateY(-10px);
                opacity: 0;
            }

            50% {
                transform: rotate(45deg) translateY(75px);
                opacity: 1;
            }

            100% {
                transform: rotate(45deg) translateY(200px);
                opacity: 0;
            }
        }

        /* 定义火箭摇摆的动画 */
        @keyframes move {
            from {
                transform: translateX(-100px) translateY(-100px);
            }

            to {
                transform: translateX(100px) translateY(150px);
            }
        }
    </style>
</head>

<body>
    <!-- 发光的灯泡 -->
    <div class="box">
        <img class="dengpao" src="../作业素材/images/dengpao.png" alt="dengpao">
        <img class="dengg" src="../作业素材/images/guang.png" alt="light">
    </div>
    <!-- 宇宙穿梭 -->
    <div class="box">
        <img class="huojian" src="../作业素材/images/huojian.png" alt="huojian">
        <div class="bgline"></div>
        <div class="bgline no1"></div>
        <div class="bgline no2"></div>
        <div class="bgline no3"></div>
    </div>
</body>

</html>

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