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('../../utils/city.js'); var app = getApp() Page({  data: {  searchLetter: [],  showLetter: "",  winHeight: 0,  // tHeight: 0,  // bHeight: 0,  cityList: [],  isShowLetter: false,  scrollTop: 0,//置顶高度  scrollTopId: '',//置顶id  city: "上海市",  hotcityList: [{ cityCode: 110000, city: '北京市' }, { cityCode: 310000, city: '上海市' }, { cityCode: 440100, city: '广州市' }, { cityCode: 440300, city: '深圳市' }, { cityCode: 330100, city: '杭州市' }, { cityCode: 320100, city: '南京市' }, { cityCode: 420100, city: '武汉市' }, { cityCode: 410100, city: '郑州市' }, { cityCode: 120000, city: '天津市' }, { cityCode: 610100, city: '西安市' }, { cityCode: 510100, city: '成都市' }, { cityCode: 500000, city: '重庆市' }]  },  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 < searchLetter.length; i++) {   var temp = {};   temp.name = searchLetter[i];   temp.tHeight = i * itemH;   temp.bHeight = (i + 1) * itemH;   tempObj.push(temp)  }  this.setData({   winHeight: winHeight,   itemH: itemH,   searchLetter: tempObj,   cityList: cityList  })  },  onReady: function () {  // 生命周期函数--监听页面初次渲染完成  },  onShow: function () {  // 生命周期函数--监听页面显示  },  onHide: function () {  // 生命周期函数--监听页面隐藏  },  onUnload: function () {  // 生命周期函数--监听页面卸载  },  onPullDownRefresh: function () {  // 页面相关事件处理函数--监听用户下拉动作  },  onReachBottom: function () {  // 页面上拉触底事件的处理函数  },  clickLetter: function (e) {  console.log(e.currentTarget.dataset.letter)  var showLetter = e.currentTarget.dataset.letter;  this.setData({   showLetter: showLetter,   isShowLetter: true,   scrollTopId: showLetter,  })  var that = this;  setTimeout(function () {   that.setData({   isShowLetter: false   })  }, 1000)  },  //选择城市  bindCity: function (e) {  console.log("bindCity")  this.setData({ city: e.currentTarget.dataset.city })  },  //选择热门城市  bindHotCity: function (e) {  console.log("bindHotCity")  this.setData({   city: e.currentTarget.dataset.city  })  },  //点击热门城市回到顶部  hotCity: function () {  this.setData({   scrollTop: 0,  })  } })

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