微信小程序城市選擇及搜索功能的方法

// pages/address/address.js
var app = getApp()

Page({
 data: {
 searchLetter: [],
 showLetter: "",
 winHeight: 0,
 cityList: [],
 isShowLetter: false,
 scrollTop: 0,//置頂高度
 scrollTopId: '',//置頂id
 city: "",
 cityList_search:[],
 address_show:false,
 search_city:[],
 is_data:true,
 empty:'',
 },
 onLoad: function (options) {
 console.log(options.currentcity)
 
 // 生命周期函數(shù)--監(jiān)聽頁(yè)面加載
 let that = this;
 that.setData({
 city: options.currentcity
 })
 var searchLetter = ["A", "B", "C", "D", "E", "F", "G", "H", "J", "K", "L", "M", "N", "P", "Q", "R", "S", "T", "W", "X", "Y", "Z"];
 new Promise(function (resolve) {
 that.getCity(function (data) {
 console.log(data)
 let cityObj = data.cityList;
 var tempObj = [];
 for (var i = 0; i < searchLetter.length; i++) {
 var initial = searchLetter[i];
 var cityInfo = [];
 var tempArr = {};
 tempArr.initial = initial;
 for (var j = 0; j < cityObj.length; j++) {
 if (initial == cityObj[j].initial) {
 cityInfo.push(cityObj[j]);
 }
 }
 tempArr.cityInfo = cityInfo;
 tempObj.push(tempArr);
 }
 console.log(tempObj)
 that.setData({
 cityList: tempObj
 })
 resolve(tempObj); 
 })
 
 }).then(function(res){
 console.log(res)
 let cityObj = [];
 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)
 }
 that.setData({
 winHeight: winHeight,
 itemH: itemH,
 searchLetter: tempObj,
 }) 
 })
 },
 getCity: function (callBack){
 let that = this;
 app.commonRequest('wxapp/public/getCityList', 'POST', {}, function (data) {
 console.log(data);
 if (data.status == '200') {
 that.setData({
 cityList: data.datainfo.list,
 // city: data.datainfo.getcode, 
 })
 callBack({
 cityList: data.datainfo.list
 })
 } else {
 callBack({
 cityList: data.datainfo.list
 })
 }
 })
 },
 set_current_city:function(set_city,callBack){
 let that = this;
 app.commonRequest('wxapp/public/getCityList', 'POST', {
 area_name: set_city,
 cityCheckType:1,
 }, function (data) {
 console.log(data)
 if (data.status == "200") {
 callBack({
 data: data
 })
 }else {
 callBack({
 data: data
 })
 }
 }) 
 },
 search_city:function(e){
 let that =this;
 that.setData({
 address_show:true
 })

 },
 cancel_city:function(e){
 let that = this;
 that.setData({
 search_city:[],
 address_show: false,
 empty:'',
 })
 },
 seacrch_city:function(e){
 let that =this;
 let search_val = e.detail.value;
 console.log(search_val);
 app.commonRequest('wxapp/public/getCityList', 'POST', {
 area_name: search_val
 }, function (data) {
 console.log(data)
 if(data.status == "200"){
 if (data.datainfo.list.length >0){
 that.setData({
 search_city: data.datainfo.list,
 is_data: true
 })
 }
 else{
 that.setData({
 search_city: data.datainfo.list,
 is_data:false
 })
 }
 } 
 }) 
 
 },
 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)
 },
 //選擇城市
 bindCity: function (e) {
 let that = this;
 console.log("bindCity");
 that.set_current_city(e.currentTarget.dataset.city,function(data){
 console.log(data)
 });
 wx.setStorageSync('currentcity', e.currentTarget.dataset.city)
 // that.onLoad();
 this.setData({
 city: e.currentTarget.dataset.city,
 // scrollTop: 0, 
 })
　　// 回到首頁(yè)
 wx.switchTab({
 url: '/pages/index/index' 
 })
 },
})

<!--pages/address/address.wxml-->
<view class="searchLetter touchClass">
 <view class="thishotText" bindtap="hotCity">
 <view style="margin-top:0;">當(dāng)前</view>
 <!-- <view style="margin-top:0;">熱門</view> -->
 </view>
 <view wx:for="{{searchLetter}}" style="color:#53985F;font-size:20rpx;" wx:key="index" data-letter="{{item.name}}" catchtouchend="clickLetter" >{{item.name}}</view>
</view>
<block wx:if="{{isShowLetter}}">
 <view class="showSlectedLetter">
 {{showLetter}}
 </view>
</block>
<scroll-view scroll-y="true" style="height:{{winHeight}}px" 
 scroll-into-view="{{scrollTopId}}" scroll-top="{{scrollTop}}">
 <view class='searchbox'>
 <view class='input_box'>
 <image class='search' src='/images/search.png'></image>
 <input placeholder='城市' onchange="seacrch_city" oninput="seacrch_city" onblur="seacrch_city" value='{{empty}}' bindtap='search_city'></input>
 <view class='close' bindtap='cancel_city'>×</view>
 </view>
 <view class='cancel' bindtap='cancel_city'>取消</view>
 </view>
 <view id='address' hidden='{{address_show}}'>
 <view class='current_city li_style'>當(dāng)前：{{city}}</view>
 <view class='all_city'>
 <view class='li_style'>所有城市</view> 
 </view> 
 <view class="selection" wx:for="{{cityList}}" wx:key="{{item.initial}}">
 <view class="item_letter" id="{{item.initial}}">{{item.initial}}</view>
 <view class="item_city" wx:for="{{item.cityInfo}}" wx:for-item="ct" wx:key="{{ct.id}}" data-cityCode="{{ct.area_code}}" data-city="{{ct.area_name}}" bindtap="bindCity">
 {{ct.area_name}}
 </view>
 </view>
 </view>
 <view id='address_search' hidden='{{!address_show}}'> 
 <view>
 <view class="item_city" wx:for="{{search_city}}" wx:for-item="ct" wx:key="{{ct.id}}" data-cityCode="{{ct.area_code}}" data-city="{{ct.area_name}}" bindtap="bindCity">
 {{ct.area_name}}
 </view>
 <view class='noData' hidden='{{is_data}}'>暫無(wú)數(shù)據(jù)</view>
 </view>
 </view>
</scroll-view>

/* pages/address/address.wxss */

.searchbox{
 overflow: hidden;
 margin: 0 20rpx;
}
.search{
 width: 20px;
 height: 20px;
 float: left;
 margin:7rpx 10rpx;
}
.input_box{
 width: 630rpx;
 height: 50rpx;
 background: #efefef;
 border-radius: 30rpx;
 float: left;
}
.input_box input{
 font-size: 25rpx;
 width: 450rpx;
 float: left;
}
.input_box .close{
 width:30rpx;
 height:30rpx;
 background:#aaa;
 color:#fff;
 border-radius:50%;
 float:right;
 margin-right:20rpx;
 margin-top:10rpx;
 line-height:27rpx;
 font-size:30rpx;
 text-align:center;
}
.searchbox .cancel{
 font-size: 25rpx;
 color: #53985F;
 width: 80rpx;
 text-align: right;
 float: right;
 line-height: 50rpx;
}
.current_city{
 border-bottom: 1rpx solid #eee; 
}
.li_style{
 height: 50rpx;
 padding: 20rpx 0;
 width: 710rpx;
 line-height: 50rpx;
 font-size: 29rpx;
 margin:0 20rpx;
}

.searchLetter {
 position: fixed;
 right: 0;
 width: 50rpx;
 text-align: center;
 justify-content: center;
 display: flex;
 flex-direction: column;
 color: #666;
 z-index: 1;
}

.searchLetter view {
 margin-top: 20rpx;
}

.touchClass {
 background-color: #fff;
 color: #fff;
 top: 100rpx;
}

.showSlectedLetter {
 background-color: rgba(0, 0, 0, 0.5);
 color: #fff;
 display: flex;
 justify-content: center;
 align-items: center;
 position: fixed;
 top: 50%;
 left: 50%;
 margin: -100rpx;
 width: 200rpx;
 height: 200rpx;
 border-radius: 20rpx;
 font-size: 52rpx;
 z-index: 1;
}

.selection {
 display: flex;
 width: 100%;
 flex-direction: column;
 margin-top: 10rpx;
}

.item_letter {
 display: flex;
 background-color: #f5f5f5;
 height: 50rpx;
 padding-left: 34rpx;
 align-items: center;
 font-size: 24rpx;
 color: #666;
}

.item_city {
 display: flex;
 background-color: #fff;
 height: 100rpx;
 padding-left: 34rpx;
 align-items: center;
 border-bottom: 1rpx solid #ededed;
 font-size: 24rpx;
 color: #666;
}

.hotcity-common {
 font-size: 24rpx;
 color: #666;
 padding: 0 0 0 30rpx;
}

.thisCity {
 padding-top: 30rpx;
}

.thisCityName {
 display: inline-block;
 border: 1rpx solid #2ab4ff;
 border-radius: 8rpx;
 padding: 10rpx 0;
 font-size: 24rpx;
 color: #2ab4ff;
 text-align: center;
 min-width: 149.5rpx;
 margin: 20rpx 0 20rpx 30rpx;
}

.thishotText {
 color: #53985F;
 font-size: 20rpx;
 margin: 0 !important;
}

.slectCity {
 border-color: #2ab4ff !important;
}

.slectCity view {
 color: #2ab4ff !important;
}

.weui-grid {
 position: relative;
 float: left;
 padding: 10rpx 0;
 width: 149.5rpx;
 box-sizing: border-box;
 border: 1rpx solid #ececec;
 border-radius: 8rpx;
 margin: 10rpx 12rpx;
}

.weui-grid__label {
 display: block;
 text-align: center;
 color: #333;
 font-size: 24rpx;
 white-space: nowrap;
 text-overflow: ellipsis;
 overflow: hidden;
}
.noData{
 text-align: center;
 font-size: 30rpx;
 color: #aaa;
 line-height: 60rpx;
}