slider标签中的bindchange和bindchanging同时使用时只能触发bindchange  这个算是BUG吗 还是说官方就只能触发bindchange  

<slider style='width:95%;height:30rpx;margin:0rpx;' step='{{0.1}}' block-size='20'

bindchanging="intervalChange"

bindchange="intervalChange1" min="8.21" max="10.52" value='{{value}}'/>

intervalChange(e){

   var that=this;

   console.log(e.detail.value)

 },

 intervalChange1(e) {

   var that = this;

   console.log(e.detail.value)

   if (e.detail.value != 9) {

     that.setData({

       value: 9

     })

   }

 },

需求是滑动时计算数据  松开后将数据还原