使用self.setData() 报错 Converting circular structure to JSON，有的页面是好的，有的报错

wxml

  <picker class="screenPicker" b  <picker class="screenPicker" bindchange="regionChange" value="{{regionIndex}}" mode="selector" range-key="value" range="{{regionList}}">

            <view class="picker">

              <view  class="storeName">{{regionList[regionIndex].value}}</view>

            <image mode="widthFix" class="xImage"  src="../../static/image/x.png"></image>

            </view>

js

   regionChange(event)  regionChange(event){

    let self = this

debugger

    console.log(event.detail.value,self.data.regionList)

self.setData()

}