app/pages/home/location/index.js

// pages/home/pages/location/index.js
var ampFile = require("../../../utils/amap-wx.js");
var app = getApp();
var util = require("../../../utils/util.js")

Page({

  /**
   * 页面的初始数据
   */
  data: {
    city: [],//热门城市
    currentCity: '武汉市',//当前城市
    search: '',
    list:[],// city list

  },

  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function (options) {
    let _this = this;
  },
  onReady: function () {
    this.loadData();
  },
  //选择城市
  bindtap(e) {
    let cityName = e.currentTarget.dataset.detail.name ? e.currentTarget.dataset.detail.name : ''
    let cityId = e.currentTarget.dataset.id
    // console.log(e.target.dataset.detail.name)
    // console.log(e)
    wx.reLaunch({
      url: `/pages/home/index/index?cityName=${cityName}&cityId=${cityId}`,
      // url: '/pages/home/index/index?id=' + e.currentTarget.dataset.id,
    })
  },
  loadData: function () {
    app._post_form('two/citylist', '', null,  (res)=> {
      // console.log(res)
      if(res && res.msg === 'success') {
        let citys = res.city, hotCitys = res.hot;
        // fommat city data
        this.handleFormatCityData({array: hotCitys, type: 'hot'})
        this.handleFormatCityData({ array: citys, type: 'normal' })
      }
    })
  },
 
  /**
   * format city data
   * @params array [array] 城市数组
   * @params type [string] 城市类型（热门 | 普通）
   */
  handleFormatCityData({array,type}) {
    if(!array.length) return 
    switch(type) {
      case 'hot':
        let arrayItem = {
          title: '热门城市',
          type,
          item: []
        },
        subItems = [];

        array.forEach(item=>{
          let subItem = {};
          subItem.key = '热门'
          subItem.name = item.name
          subItem.id=item.id
          subItems.push(subItem)
        })
        arrayItem.item = subItems
        // console.log(arrayItem)
        this.setData({
          list: [arrayItem]
        })
        break;
      default:
        let _array = [];
        array.forEach(item => {
          let _arrayItem = {}
          _arrayItem.title = item.letter
          let arrayItem = []
          try {
            item.city.forEach(ite=>{
              let subItem = {};
              subItem.key = item.letter
              subItem.name = ite.name
              subItem.id=ite.id
              arrayItem.push(subItem)
            })
            _arrayItem.item = arrayItem
            // console.log(_arrayItem)
          }
        
          catch(e) {
            // console.log(e)
          }
          _array.push(_arrayItem)
        })
        this.setData({
          list: [...this.data.list, ..._array]
        })
        break;
    }
    
    
  },
  //重新定位
  relocation() {

  }
})