触摸参数：

touchstart：触摸开始

touchmove：接触点改变，滑动时

touchend：触摸结束，手指离开屏幕时

touches:当前位于屏幕上所有手指的列表

代码部分：

html:

  <div class="all" @touchstart = "touchstart" @touchmove = 'touchmove'></div>

js：

    touchstart(e){
      this.startX = e.touches[0].clientX
      this.startY = e.touches[0].clientY
    },
    touchmove(e){
      this.moveX = e.touches[0].clientX
      this.moveY = e.touches[0].clientY

      let x = this.moveX - this.startX
      let y = this.moveY - this.startY
      if(x > 20 && Math.abs(x) > Math.abs(y) ){
        this.active = 0 //右滑
      }

      if(x < - 20 && Math.abs(x) > Math.abs(y) ){
        this.active = 1 //左滑
      }

    },