版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/weixin_38704338/article/details/84619433
function moveanyway () {
// 获取节点
var block = document.getElementById('myCoups')
if (block) {
var oW, oH
// 绑定touchstart事件
block.addEventListener('touchstart', function (e) {
var touches = e.touches[0]
oW = touches.clientX - block.offsetLeft
oH = touches.clientY - block.offsetTop
// 阻止页面的滑动默认事件
document.addEventListener('touchmove', defaultEvent, { passive: false })
}, false)
block.addEventListener('touchmove', function (e) {
var touches = e.touches[0]
var oLeft = touches.clientX - oW
var oTop = touches.clientY - oH
if (oLeft < 10) {
oLeft = 10
if (oTop <= 10) {
oTop = 10
} else if (oTop >= document.documentElement.clientHeight - block.offsetHeight - 10) {
oTop = document.documentElement.clientHeight - block.offsetHeight - 10
}
} else if (oLeft > document.documentElement.clientWidth - block.offsetWidth - 10) {
oLeft = (document.documentElement.clientWidth - block.offsetWidth - 10)
if (oTop <= 10) {
oTop = 10
} else if (oTop >= document.documentElement.clientHeight - block.offsetHeight - 10) {
oTop = document.documentElement.clientHeight - block.offsetHeight - 10
}
} else if (oTop < 10) {
oTop = 10
} else if (oTop > document.documentElement.clientHeight - block.offsetHeight - 10) {
oTop = document.documentElement.clientHeight - block.offsetHeight - 10
}
block.style.left = oLeft + 'px'
block.style.top = oTop + 'px'
}, false)
block.addEventListener('touchend', function () {
document.removeEventListener('touchmove', defaultEvent, { passive: false })
}, false)
}
function defaultEvent (e) {
e.preventDefault()
}