微信小程序开发中怎样实现地址页面三级联动

let val = e.detail.value,             t = this.data.values,             cityData = this.data.cityData,             index = this.data.id,             list = this.data.addrList;             list[index].area = true;             try {                if (val[0] != t[0]) { //当val是选择省份的时候                 const citys = [];                 const countys = [];                     cityData[val[0]].child.map(item => citys.push({name:item.name,id:item.id}));                     cityData[val[0]].child[0].child.map(item => countys.push({name:item.name,id:item.id}));                     list[index].provinceName = this.data.provinces[val[0]].name;//省份                     list[index].cityName = cityData[val[0]].child[0].name;//城市                     list[index].districtName = cityData[val[0]].child[0].child[0].name;//地区                     list[index].province = this.data.provinces[val[0]].id;//对应的传值ID                     list[index].city = cityData[val[0]].child[0].id;//对应的传值ID                     list[index].district = cityData[val[0]].child[0].child[0].id;//对应的传值ID                 this.setData({                     citys: citys,                     countys: countys,                     values: val,                     value: [val[0], 0, 0],                     addrList: list                 })                    return;                 }                if (val[1] != t[1]) {//当val是选择城市的时候                     const countys = [];                     cityData[val[0]].child[val[1]].child.map(item => countys.push({name:item.name,id:item.id}));                     list[index].cityName = this.data.citys[val[1]].name;// 选择城市                     list[index].city = this.data.citys[val[1]].id;//对应的传值ID                     list[index].districtName = cityData[val[0]].child[val[1]].child[0].name;//选择城市对应的地区                     list[index].district = cityData[val[0]].child[val[1]].child[0].id;//对应的传值ID                     this.setData({                         countys: countys,                         values: val,                         value: [val[0], val[1], 0],                         addrList: list                     })                    return;                 }                if (val[2] != t[2]) {//当val是选择地区的时候                     list[index].districtName = this.data.countys[val[2]].name;//选择地区                     list[index].district = this.data.countys[val[2]].id;//对应的传值ID                     this.setData({                         county: this.data.countys[val[2]].name,                         values: val,                         addrList: list                     })                    return;                 }                  } catch(e) {                 // statements                 console.log(e);             } list里面是有 收货人，电话，等等信息  但是我只操作改变数组里面地址改变的信息，