代码实现:

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        body {
            background-color: #1cee89;
        }
        
        div {
            position: absolute;
            left: 0;
            width: 100px;
            height: 100px;
            background-color: #8294ff;
            border-radius: 20px;
        }
    </style>
</head>

<body>
    <div></div>
    <script>
        var div = document.querySelector(\'div\');
        var startX = 0; // 获取手指初始坐标
        var startY = 0;
        var x = 0; // 获得盒子原来的位置
        var y = 0;
        // 手指触摸
        div.addEventListener(\'touchstart\', function(e) {
            //  获取手指初始坐标
            startX = e.targetTouches[0].pageX;
            startY = e.targetTouches[0].pageY;
            x = this.offsetLeft;
            y = this.offsetTop;
            this.style.boxShadow = \'0 0 15px rgba(0, 0, 0, .6)\';
        });
        // 手指离开
        div.addEventListener(\'touchend\', function(e) {
            this.style.boxShadow = \'\';
        });

        // 手指按住移动
        div.addEventListener(\'touchmove\', function(e) {
            //  计算手指的移动距离:手指移动之后的坐标减去手指初始的坐标
            var moveX = e.targetTouches[0].pageX - startX;
            var moveY = e.targetTouches[0].pageY - startY;
            // 移动盒子 盒子原来的位置 + 手指移动的距离
            this.style.left = x + moveX + \'px\';
            this.style.top = y + moveY + \'px\';
            e.preventDefault(); // 阻止屏幕滚动的默认行为
        });
    </script>
</body>

</html>

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本文链接:https://www.cnblogs.com/jacklzx/p/13810732.html