小程序picker省市区组件

 省市区组件json代码

https://github.com/aliang2418/woshinib/blob/master/fils

小程序组件js代码

var jsonData = require('../json/cityCode.js');
function init(){
  var cityArray = [
    [],
    [],
    [],
  ];
  for (let i = 0, len = jsonData.citylist.length; i < len; i++) {
    //获取省级数据
    let province = jsonData.citylist[i];
    let pObject = {
      id: province.p_code,
      name: province.p_name
    }
    //赋值第一个数组 省级数据
    cityArray[0].push(pObject);
  }
  // 默认北京市 市辖区
  //市级数据
  let city = jsonData.citylist[0].s;
  for (let j = 0; j < city.length; j++) {
    let cObject = {
      id: city[j].s_code,
      name: city[j].s_name
    }
    //赋值第二个数组 市级数据
    cityArray[1].push(cObject);
    //区级数据

  }
  let region = city[0].c;
  for (let k = 0; k < region.length; k++) {
    let rObject = {
      id: region[k].c_code,
      name: region[k].c_name
    }
    // 赋值区级数据
    cityArray[2].push(rObject);
  }
  return cityArray;
}
function changeCloumt(cityArray,index,column,province_index){
    if (column == 0) {
      cityArray[1] = [];
      cityArray[2] = [];
      //第一列切换
      let city = jsonData.citylist[index].s;
      for (let j = 0; j < city.length; j++) {
        let cObject = {
          id: city[j].s_code,
          name: city[j].s_name
        }
        //赋值第二个数组 市级数据
        cityArray[1].push(cObject);
        //区级数据
      }
      let region = city[0].c;
      for (let k = 0; k < region.length; k++) {
        let rObject = {
          id: region[k].c_code,
          name: region[k].c_name
        }
        // 赋值区级数据
        cityArray[2].push(rObject);
      }
      return cityArray;
    }
    if (column == 1) {
      //第二列切换
      cityArray[2] = [];
      let province = cityArray[0][province_index];
      for (let i = 0, len = jsonData.citylist.length; i < len; i++) {
        let p = jsonData.citylist[i];
        if (province.id == p.p_code) {
          province = p;
        }
      }
      //获取已存在的省市区
      let city = province.s;
      let region = city[index].c;
      for (let k = 0; k < region.length; k++) {
        let rObject = {
          id: region[k].c_code,
          name: region[k].c_name
        }
        // 赋值区级数据
        cityArray[2].push(rObject);
      }
     return cityArray;
    }
}
function getCityCode(array){
  let arrayText = [];
  let p = array[0];
  let c = array[1];
  let r = array[2];
  let city;
  for (let i = 0, len = jsonData.citylist.length; i < len; i++) {
    let province = jsonData.citylist[i];
    if (p == province.p_code) {
      city = province.s;
      arrayText[0] = province.p_name;
    }
  }
  let region;
  for(let j = 0;  j < city.length; j++){
    if(c == city[j].s_code){
      region = city[j].c;
      arrayText[1] = city[j].s_name
    }
  }
  for(let k = 0;  k < region.length; k++){
    if(r == region[k].c_code){
      arrayText[2] = region[k].c_name
    }
  }
  return arrayText;
}
function getCityIndex(cityArray,array){
  let arrayText = [];
  let p = array[0];
  let c = array[1];
  let r = array[2];
  arrayText[0] = cityArray[0][p];
  arrayText[1] = cityArray[1][c];
  arrayText[2] = cityArray[2][r];
  return arrayText;
}
module.exports = {
  getCityCode: getCityCode,
  init: init,
  changeCloumt:changeCloumt,
  getCityIndex:getCityIndex
}

其他页面在头部引入

var cityUtil = require("../../utils/city");

 在onload中添加

onLoad: function (options) {
this.setData({
      cityArray:cityUtil.init()
    })
}

其他事件

func_changeCitysChange(e){
    console.log(e);
    let array = cityUtil.getCityIndex(this.data.cityArray,e.detail.value);
    this.setData({
      region:[array[0].name,array[1].name,array[2].name],
      region_code:[array[0].id,array[1].id,array[2].id],
      citysIndex:e.detail.value
    })
  },
  changeCitysChangeColumn(e){
    console.log(e);
    let column = e.detail.column;
    let index = e.detail.value;
    if(column == 0 ){
      this.setData({
        province_index:index,
        cityArray:cityUtil.changeCloumt(this.data.cityArray,index,column)
      })
    }
    if(column == 1){
      this.setData({
        cityArray:cityUtil.changeCloumt(this.data.cityArray,index,column,this.data.province_index)
      })
    }
  },

wxml代码

	
					{{region[0]}}{{region[1]}}{{region[2]}}
					请选择省市区