微信小程序开发中怎样做出城市选择

本文实例为大家分享了微信小程序城市选择器，供大家参考，具体内容如下

代码很简单.

var city = require(&＃39;../../utils/city.js&＃39;);
var app = getApp()
Page({
 data: {
 searchLetter: [],
 showLetter: "",
 winHeight: 0,
 // tHeight: 0,
 // bHeight: 0,
 cityList: [],
 isShowLetter: false,
 scrollTop: 0,//置顶高度
 scrollTopId: &＃39;&＃39;,//置顶id
 city: "上海市",
 hotcityList: [{ cityCode: 110000, city: &＃39;北京市&＃39; }, { cityCode: 310000, city: &＃39;上海市&＃39; }, { cityCode: 440100, city: &＃39;广州市&＃39; }, { cityCode: 440300, city: &＃39;深圳市&＃39; }, { cityCode: 330100, city: &＃39;杭州市&＃39; }, { cityCode: 320100, city: &＃39;南京市&＃39; }, { cityCode: 420100, city: &＃39;武汉市&＃39; }, { cityCode: 410100, city: &＃39;郑州市&＃39; }, { cityCode: 120000, city: &＃39;天津市&＃39; }, { cityCode: 610100, city: &＃39;西安市&＃39; }, { cityCode: 510100, city: &＃39;成都市&＃39; }, { cityCode: 500000, city: &＃39;重庆市&＃39; }]
 },
 onLoad: function () {
 // 生命周期函数--监听页面加载
 var searchLetter = city.searchLetter;
 var cityList = city.cityList();
 var sysInfo = wx.getSystemInfoSync();
 var winHeight = sysInfo.windowHeight;
 var itemH = winHeight / searchLetter.length;
 var tempObj = [];
 for (var i = 0; i 
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