微信小程序省市区三级联动

<view>
  <picker mode="region" bindchange="bindRegionChange" value="{{region}}">
      <text wx:if="{{region==''}}">请选择省市区</text>
      <text wx:if="{{region!=''}}">{{region[0]}}、{{region[1]}}、{{region[2]}}</text>
  </picker>
</view>

Page({
    data: {
      region: [],// 选中的数据
    },
    //点击确定按钮
    bindRegionChange: function (e) {
      console.log(e.detail.value)
      console.log(e.detail.code)
      this.setData({
        region: e.detail.value
      })
    }
  })