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>