ClassContent/历届学生/font-end-nine/项目练习/学生项目/刘正阳/每日作业/6.19 作业/下拉滑动.html

<!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>下拉滑动</title>
    <style>
        body,
        ul,
        li {
            margin: 0;
            padding: 0;
        }

        .main {
            position: relative;
        }

        .main ul {
            overflow: hidden;
            margin-top: 45px;
        }

        .main ul li {
            display: flex;
            height: 45px;
            align-items: center;
            position: relative;
            padding: 0 15px;
            border-bottom: 1px solid #f4f0f0;
            transition-duration: 0.3s;
        }

        .main .item {
            width: 100%;
        }

        .main .action {
            display: flex;
            align-items: center;
            height: 100%;
            position: absolute;
            right: -180px;
        }

        .main .action .item {
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 0 14px;
            color: #fff;
        }

        .head {
            z-index: 999;
        }

        .head ul {
            height: 45px;
            line-height: 45px;
            position: fixed;
            top: 0;
            left: 0;
        }

        .head ul li {
            display: inline-block !important;
            float: left;
            margin-left: 20px;
        }

        .shuaxin {
            width: 30px;
            height: 30px;
            position: absolute;
            top: -30px;
            right: 50%;
            z-index: 2;
        }
    </style>
</head>

<body>
    <div class="head">
        <ul>
            <li>
                推荐
            </li>
            <li>
                热门
            </li>
            <li>
                动画
            </li>
            <li>
                影视
            </li>
        </ul>
    </div>
    <div class="main">
        <img src="./img/shuaxin.png" alt="" height="30px" width="30px" class="shuaxin">
        <ul>
            <li>
                <div class="item">内容1</div>
            </li>
            <li>
                <div class="item">内容2</div>
            </li>
            <li>
                <div class="item">内容3</div>
            </li>
        </ul>
    </div>
</body>
<script>
    var startY = 0;
    _(".shuaxin").forEach((v, i) => {

        _(".shuaxin").forEach((v, i) => {
            v.open = false
            v.addEventListener('touchstart', (e) => {
                startY = e.targetTouches[0].screenY;

                _(".shuaxin").forEach((j, index) => {
                    if (index != i) {
                        j.style.transform = `translateY(-30px)`;
                    }
                })
                console.log("startY: ", startY);
            })

            v.addEventListener('touchmove', (e) => {
                var moveY = e.targetTouches[0].screenY
                if (!v.open) {
                    var y = moveY - startY
                    console.log("下滑：",);
                    v.style.transform = `translateY(${
                        y < 50 ? y : 50}px)`
                        v.open=true
                }
                else {
                    if (v.open) {
                        var newY = -50 + (moveY - startY)
                        v.style.transform = `translateY(${newY <= 0 ? 0 : newY}px)`;
                    }
                }
            })
        })
        v.addEventListener('touchend', (e) => {
            var endY = e.changedTouches[0].screenY;
            var ox = endY -startY

            if (startY < endY) {
                if (ox < 250) {
                    v.style.transform = `translateY(0px)`
                    v.open = false
                }
                else {
                    v.style.transform = `translateY(250px)`
                    setTimeout(function(){
                        v.style.transform = `translateY(0px)`},3000);
                }
            }
        })
    })
    function $(className) {
        return document.querySelector(className)
    }
    function _(className) {
        return document.querySelectorAll(className)
    }
</script>

</html>