实现微信小程序picker 省市区 自定义数据 支持三级联动

    <view class=" h-100 b-b l-h-100">
        <picker mode="multiSelector" bindchange="bindMultiPickerChange" bindcolumnchange="bindMultiPickerColumnChange" range-key="name" value="{{multiIndex}}" range="{{multiArray}}">
          <view class="picker flex-r">
            <view class="bold"><text class="c-f00">*</text>地区</view> <text> {{multiArray[0][multiIndex[0]].name}}{{multiArray[1][multiIndex[1]].name}}{{multiArray[2][multiIndex[2]].name}} </text>
          </view>
        </picker>
      </view>

data:{
      multiArray: [],//地区
      multiIndex: [0, 0, 0],
      type:0,
}

// POST 开发完成 
  // 获取省市区
   首次调用 type传0
  code 为查询下级的id  code 为空时则查询省
  getcitycode(type，code){
    var self=this
    var {multiArray,multiIndex,code,street}=this.data
    app.ajax({
      code,
      url: '/shenshiqu',
    }, function (result) {
      multiArray[type]=result.data.data
      if(type<2)self.getcitycode(type+1,result.data.data[index].taobaoid)
    })
  },

// 选择省市区
  bindMultiPickerChange: function (e) {
    console.log('picker发送选择改变，携带值为', e.detail.value)
    this.setData({multiIndex: e.detail.value})
  },
  // 选择省市区
  bindMultiPickerColumnChange: function (e) {
    console.log('修改的列为', e.detail.column, '，值为', e.detail.value);
    var data = {
      multiArray: this.data.multiArray,
      multiIndex: this.data.multiIndex
    };
    data.multiIndex[e.detail.column] = e.detail.value;
    switch (e.detail.column) {
      case 0:
        console.log(data.multiArray[e.detail.column][e.detail.value].taobaoid)
        this.getcitycode(1,data.multiArray[e.detail.column][e.detail.value].taobaoid)
        break;
      case 1:
          console.log(data.multiArray[e.detail.column][e.detail.value].taobaoid)
          this.getcitycode(2,data.multiArray[e.detail.column][e.detail.value].taobaoid)
          break;
    }
    this.setData(data);
  },