vue移动端写的拖拽

总结了一下评论，好像发现大家都碰到了滑动的问题。就在这里提醒一下吧。可将该悬浮 DIV 同你的 scroller web 同级。 

<template>
	<div id="webId">
    	<div>你的web页面</div>
	    <!-- 1.1 如果碰到滑动问题，请检查这里是否属于同一点。 -->
	    <!-- 悬浮的HTML -->
	    <div class="xuanfu" id="moveDiv"
	      @mousedown="down()" @touchstart="down()"
	      @mousemove.prevent.stop="move()"
          @touchmove.prevent.stop="move()"
	      @mouseup="end()" @touchend="end()"
	    >
	      <div class="yuanqiu">11</div>
	    </div>
	</div>
</template>

<script>
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;
    let 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){
      let 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;
      //添加限制：只允许在屏幕内拖动
	  const maxWidth = document.body.clientWidth - 54;//屏幕宽度减去悬浮框宽高
	  const maxHeight = document.body.clientHeight - 54;
	  if (this.xPum < 0) { //屏幕x限制
		this.xPum = 0;
	  } else if (this.xPum>maxWidth) {
	    this.xPum = maxWidth;
	  }
	  if (this.yPum < 0) { //屏幕y限制
		this.yPum = 0;
	  } else if (this.yPum>maxHeight) {
		this.yPum = maxHeight;
	  }
      moveDiv.style.left = this.xPum+"px";
      moveDiv.style.top = this.yPum +"px";
      //阻止页面的滑动默认事件
      document.addEventListener("touchmove",function(){ // 1.2 如果碰到滑动问题，请注意是否获取到 touchmove
          event.preventDefault();//jq 阻止冒泡事件
          // event.stopPropagation(); // 如果没有引入jq 就用 stopPropagation()
      },false);
    }
  },
//鼠标释放时候的函数
  end(){
    this.flags = false;
  },
}
</script>

<style>
  /*css样式可自定义 仅提供参考*/
  #webId { position: relative; }
  .xuanfu {
    height: 54px; /* rem = 12px */
    width: 54px;
    /*1.3  如果碰到滑动问题，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>