vue实现移动端悬浮窗效果

<template>
 <div id=\"webId\">
 ...
 <div>你的web页面</div>
 <!-- 如果碰到滑动问题，1.1 请检查这里是否属于同一点。 -->
 <!-- 悬浮的HTML -->
 <div v-if=\"!isShow\" class=\"xuanfu\" id=\"moveDiv\"
  @mousedown=\"down\" @touchstart=\"down\"
  @mousemove=\"move\" @touchmove=\"move\"
  @mouseup=\"end\" @touchend=\"end\"
 >
  <div class=\"yuanqiu\">
  {{pageInfo.totalPage}}
  </div>
 </div>
 ...
 </div>
</template>

< >
data() {
 return {
 flags: false,
 position: { x: 0, y: 0 },
 nx: \'\', ny: \'\', dx: \'\', dy: \'\', xPum: \'\', yPum: \'\',
 }
}

methods: {
 // 实现移动端拖拽
 down(){
 this.flags = true;
 var touch;
 if(event.touches){
  touch = event.touches[0];
 }else {
  touch = event;
 }
 this.position.x = touch.clientX;
 this.position.y = touch.clientY;
 this.dx = moveDiv.offsetLeft;
 this.dy = moveDiv.offsetTop;
 },
 move(){
 if(this.flags){
  var touch ;
  if(event.touches){
   touch = event.touches[0];
  }else {
   touch = event;
  }
  this.nx = touch.clientX - this.position.x;
  this.ny = touch.clientY - this.position.y;
  this.xPum = this.dx+this.nx;
  this.yPum = this.dy+this.ny;
  moveDiv.style.left = this.xPum+\"px\";
  moveDiv.style.top = this.yPum +\"px\";
  //阻止页面的滑动默认事件；如果碰到滑动问题，1.2 请注意是否获取到 touchmove
  document.addEventListener(\"touchmove\",function(){
   event.preventDefault();
  },false);
 }
 },
//鼠标释放时候的函数
 end(){
 this.flags = false;
 },
}
</ >

<style>
 .xuanfu {
 height: 4.5rem;
 width: 4.5rem;
 /* 如果碰到滑动问题，1.3 请检查 z-index。z-index需比web大一级*/
 z-index: 999;
 position: fixed;
 top: 4.2rem;
 right: 3.2rem;
 border-radius: 0.8rem;
 background-color: rgba(0, 0, 0, 0.55);
 }
 .yuanqiu {
 height: 2.7rem;
 width: 2.7rem;
 border: 0.3rem solid rgba(140, 136, 136, 0.5);
 margin: 0.65rem auto;
 color: #000000;
 font-size: 1.6rem;
 line-height: 2.7rem;
 text-align: center;
 border-radius: 100%;
 background-color: #ffffff;
 }
</style>