This article mainly introduces in detail the relevant methods of selecting cities based on letters in the WeChat applet. It has certain reference value. Interested friends can refer to it
Develop a small program today , which involves region selection. After reading some versions on the Internet, I feel that the writing is incomplete. Maybe my understanding is not enough. Today I will combine the answers on the Internet and reorganize them according to my own needs. I hope everyone has to help. Let’s take a look at the screenshots first:
Project screenshots
Let’s sort out the code.
1. Create the index.wxml file
In the pages->index folder, create a new index.wxml file with the following code:
class="title">
class="title_list" value="{{cityName}}" placeholder="城市名称" />
确认
scroll-y="true" style="height: {{winHeight}}px;" scroll-into-view="{{scrollTopId}}" class="city_list">
wx:for="{{city}}" wx:for-index="idx" wx:for-item="cityName">
id="{{idx}}" class="list_tit">{{idx}}
wx:for="{{cityName}}">
class="list_con" data-city="{{item.name}}" bindtap="bindCity">{{item.name}}
class="scroll_list"
bindtouchstart="chStart"
bindtouchend="chEnd"
catchtouchmove="chMove"
style="background: rgba(0,0,0,{{trans}});"
>
wx:for="{{city}}" wx:for-index="idx" wx:for-item="cityName">
wx:if="{{idx != '热门城市'}}">
id="{{idx}}" class="scroll_list_chi" style="line-height:{{lineHeight}}px ; height:{{lineHeight}}px ;font-size:{{lineHeight/1.7}}px;" bindtouchstart="getWords" bindtouchend="setWords">{{idx}}
hidden="{{hidden}}" class="showwords">
{{showwords}}2. Create the corresponding CSS
In the pages->index folder, create a new index.wxss file, the code is as follows:
/**index.wxss**/
.title {
position: relative;
padding: 10px 0;
}
.title_list {
display: inline-block;
padding: 0 15px;
height: 20px;
line-height: 20px;
font-size: 16px;
}
.title button {
width: 50px;
height: 30px;
font-size: 16px;
padding: 0;
line-height: 30px;
margin: auto;
position: absolute;
top: 0;
bottom:0;
right: 10px;
background: none;
}
.title button::after {
border: none;
}
.title_list:nth-child(1) {
border-right:1px #ccc solid;
}
/*城市列表*/
.city_list {
position: relative;
}
/*城市选择头部*/
.list_tit {
display: block;
line-height: 40px;
height: 40px;
padding-left: 15px;
font-size: 16ppx;
background: #f5f5f5;
color: #666;
}
.list_con {
height: 40px;
/*border-top: 1px #f5f5f5 solid ;*/
line-height: 40px;
font-size: 16px;
padding-left: 15px;
}
.list_con::before {
content: " ";
height: 1px;
border-top: 1px #f5f5f5 solid;
position: absolute;
width: 100%;
}
.list_con::before:nth-child(1) {
border: none;
}
/*城市选择 右边*/
.scroll_list {
background: rgba(0,0,0,0);
position: absolute;
height: calc(100% - 100px);
width: 25px;
top: 90px;
right: 10px;
}
.scroll_list_chi {
/*border: 1px blue solid;*/
text-align: center;
font-size: 12px;
}
/*显示框*/
.showwords {
width: 80px;
height: 80px;
background: rgba(0,0,0,.3);
border-radius:50%;
line-height: 80px;
text-align: center;
font-size:10vw;
margin: auto;
position: absolute;
top: 0;left: 0;bottom: 0;right: 0;
z-index: 999;
}3. Create a JS file
In the pages->index folder, create a new index.js file, the code is as follows:
//先引用城市数据文件
var city = require('../../utils/city.js')
var lineHeight = 0;
var endWords = "";
var isNum;
Page({
data: {
"hidden": true,
cityName:"", //获取选中的城市名
},
onLoad: function (options) {
// 生命周期函数--监听页面加载
},
onReady: function () {
// 生命周期函数--监听页面初次渲染完成
var cityChild = city.City[0];
var that = this;
wx.getSystemInfo({
success: function (res) {
lineHeight = (res.windowHeight - 100) / 22;
console.log(res.windowHeight - 100)
that.setData({
city: cityChild,
winHeight: res.windowHeight - 40,
lineHeight: lineHeight
})
}
})
},
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
},
//触发全部开始选择
chStart: function () {
this.setData({
trans: ".3",
hidden: false
})
},
//触发结束选择
chEnd: function () {
this.setData({
trans: "0",
hidden: true,
scrollTopId: this.endWords
})
},
//获取文字信息
getWords: function (e) {
var id = e.target.id;
this.endWords = id;
isNum = id;
this.setData({
showwords: this.endWords
})
},
//设置文字信息
setWords: function (e) {
var id = e.target.id;
this.setData({
scrollTopId: id
})
},
// 滑动选择城市
chMove: function (e) {
var y = e.touches[0].clientY;
var offsettop = e.currentTarget.offsetTop;
var height = 0;
var that = this;
;
var cityarr = ["A", "B", "C", "D", "E", "F", "G", "H", "J", "K", "L", "M", "N", "P", "Q", "R", "S", "T", "W", "X", "Y", "Z"]
// 获取y轴最大值
wx.getSystemInfo({
success: function (res) {
height = res.windowHeight - 10;
}
});
//判断选择区域,只有在选择区才会生效
if (y > offsettop && y < height) {
// console.log((y-offsettop)/lineHeight)
var num = parseInt((y - offsettop) / lineHeight);
endWords = cityarr[num];
// 这里 把endWords 绑定到this 上，是为了手指离开事件获取值
that.endWords = endWords;
};
//去除重复，为了防止每次移动都赋值 ,这里限制值有变化后才会有赋值操作，
//DOTO 这里暂时还有问题，还是比较卡，待优化
if (isNum != num) {
// console.log(isNum);
isNum = num;
that.setData({
showwords: that.endWords
})
}
},
//选择城市，并让选中的值显示在文本框里
bindCity: function(e) {
console.log(e);
var cityName = e.currentTarget.dataset.city;
this.setData({ cityName: cityName })
}
})4. Create city file
Create city.js in the utils folder file, the specific code is as follows:
var city = {
"City": [
{
"热门城市": [
{
"name": "北京",
"key": "热门"
},
{
"name": "上海",
"key": "热门"
},
{
"name": "广州",
"key": "热门"
},
{
"name": "深圳",
"key": "热门"
},
{
"name": "成都",
"key": "热门"
},
{
"name": "重庆",
"key": "热门"
},
{
"name": "天津",
"key": "热门"
},
{
"name": "杭州",
"key": "热门"
},
{
"name": "南京",
"key": "热门"
},
{
"name": "苏州",
"key": "热门"
},
{
"name": "武汉",
"key": "热门"
},
{
"name": "西安",
"key": "热门"
}
],
"A": [
{
"name": "阿坝",
"key": "A"
},
{
"name": "阿拉善",
"key": "A"
},
{
"name": "阿里",
"key": "A"
},
{
"name": "安康",
"key": "A"
},
{
"name": "安庆",
"key": "A"
},
{
"name": "鞍山",
"key": "A"
}
,
{
"name": "安顺",
"key": "A"
}
,
{
"name": "安阳",
"key": "A"
}
,
{
"name": "澳门",
"key": "A"
}
],
"B": [
{
"name": "北京",
"key": "B"
},
{
"name": "白银",
"key": "B"
},
{
"name": "保定",
"key": "B"
},
{
"name": "宝鸡",
"key": "B"
},
{
"name": "保山",
"key": "B"
},
{
"name": "包头",
"key": "B"
},
{
"name": "巴中",
"key": "B"
}
,
{
"name": "北海",
"key": "B"
}
,
{
"name": "蚌埠",
"key": "B"
}
,
{
"name": "本溪",
"key": "B"
}
,
{
"name": "毕节",
"key": "B"
}
,
{
"name": "滨州",
"key": "B"
}
,
{
"name": "百色",
"key": "B"
}
,
{
"name": "亳州",
"key": "B"
}
],
"C": [
{
"name": "重庆",
"key": "C"
},
{
"name": "成都",
"key": "C"
},
{
"name": "长沙",
"key": "C"
},
{
"name": "长春",
"key": "C"
},
{
"name": "沧州",
"key": "C"
},
{
"name": "常德",
"key": "C"
},
{
"name": "昌都",
"key": "C"
}
,
{
"name": "长治",
"key": "C"
}
,
{
"name": "常州",
"key": "C"
}
,
{
"name": "巢湖",
"key": "C"
}
,
{
"name": "潮州",
"key": "C"
}
,
{
"name": "承德",
"key": "C"
}
,
{
"name": "郴州",
"key": "C"
}
,
{
"name": "赤峰",
"key": "C"
}
,
{
"name": "池州",
"key": "C"
}
,
{
"name": "崇左",
"key": "C"
}
,
{
"name": "楚雄",
"key": "C"
}
,
{
"name": "滁州",
"key": "C"
}
,
{
"name": "朝阳",
"key": "C"
}
],
"D": [
{
"name": "大连",
"key": "D"
},
{
"name": "东莞",
"key": "D"
},
{
"name": "大理",
"key": "D"
},
{
"name": "丹东",
"key": "D"
},
{
"name": "大庆",
"key": "D"
},
{
"name": "大同",
"key": "D"
},
{
"name": "大兴安岭",
"key": "D"
}
,
{
"name": "德宏",
"key": "D"
}
,
{
"name": "德阳",
"key": "D"
}
,
{
"name": "德州",
"key": "D"
}
,
{
"name": "定西",
"key": "D"
}
,
{
"name": "迪庆",
"key": "D"
}
,
{
"name": "东营",
"key": "D"
}
],
"E": [
{
"name": "鄂尔多斯",
"key": "E"
}
,
{
"name": "恩施",
"key": "E"
}
,
{
"name": "鄂州",
"key": "E"
}
],
"F": [
{
"name": "福州",
"key": "F"
}
,
{
"name": "防城港",
"key": "F"
}
,
{
"name": "佛山",
"key": "F"
}
,
{
"name": "抚顺",
"key": "F"
}
,
{
"name": "抚州",
"key": "F"
}
,
{
"name": "阜新",
"key": "F"
}
,
{
"name": "阜阳",
"key": "F"
}
]
,
"G": [
{
"name": "广州",
"key": "G"
},
{
"name": "赣州",
"key": "G"
},
{
"name": "桂林",
"key": "G"
},
{
"name": "贵阳",
"key": "G"
},
{
"name": "甘南",
"key": "G"
},
{
"name": "甘孜",
"key": "G"
},
{
"name": "广安",
"key": "G"
}
,
{
"name": "广元",
"key": "G"
}
,
{
"name": "果洛",
"key": "G"
}
,
{
"name": "贵港",
"key": "G"
}
],
"H": [
{
"name": "杭州",
"key": "H"
},
{
"name": "哈尔滨",
"key": "H"
},
{
"name": "合肥",
"key": "H"
},
{
"name": "海口",
"key": "H"
},
{
"name": "海东",
"key": "H"
},
{
"name": "海北",
"key": "H"
},
{
"name": "海南",
"key": "H"
}
,
{
"name": "海西",
"key": "H"
}
,
{
"name": "邯郸",
"key": "H"
}
,
{
"name": "汉中",
"key": "H"
}
,
{
"name": "鹤壁",
"key": "H"
}
,
{
"name": "河池",
"key": "H"
}
,
{
"name": "鹤岗",
"key": "H"
}
,
{
"name": "黑河",
"key": "H"
}
,
{
"name": "衡水",
"key": "H"
}
,
{
"name": "衡阳",
"key": "H"
}
,
{
"name": "河源",
"key": "H"
}
,
{
"name": "贺州",
"key": "H"
}
,
{
"name": "红河",
"key": "H"
}
,
{
"name": "淮安",
"key": "H"
}
,
{
"name": "淮北",
"key": "H"
}
,
{
"name": "怀化",
"key": "H"
}
,
{
"name": "淮南",
"key": "H"
}
,
{
"name": "黄冈",
"key": "H"
}
,
{
"name": "黄南",
"key": "H"
}
,
{
"name": "黄山",
"key": "H"
},
{
"name": "黄石",
"key": "H"
},
{
"name": "惠州",
"key": "H"
},
{
"name": "葫芦岛",
"key": "H"
},
{
"name": "呼伦贝尔",
"key": "H"
},
{
"name": "湖州",
"key": "H"
}
,
{
"name": "菏泽",
"key": "H"
}
],
"J": [
{
"name": "济南",
"key": "J"
},
{
"name": "佳木斯",
"key": "J"
},
{
"name": "吉安",
"key": "J"
},
{
"name": "江门",
"key": "J"
},
{
"name": "焦作",
"key": "J"
},
{
"name": "嘉兴",
"key": "J"
},
{
"name": "嘉峪关",
"key": "J"
}
,
{
"name": "揭阳",
"key": "J"
}
,
{
"name": "吉林",
"key": "J"
}
,
{
"name": "金昌",
"key": "J"
}
,
{
"name": "晋城",
"key": "J"
}
,
{
"name": "景德镇",
"key": "J"
}
,
{
"name": "荆门",
"key": "J"
}
,
{
"name": "荆州",
"key": "J"
}
,
{
"name": "金华",
"key": "J"
}
,
{
"name": "济宁",
"key": "J"
}
,
{
"name": "晋中",
"key": "J"
}
,
{
"name": "锦州",
"key": "J"
}
,
{
"name": "九江",
"key": "J"
}
,
{
"name": "酒泉",
"key": "J"
}
]
,
"K": [
{
"name": "昆明",
"key": "K"
}
,
{
"name": "开封",
"key": "K"
}
]
,
"L": [
{
"name": "兰州",
"key": "L"
},
{
"name": "拉萨",
"key": "L"
},
{
"name": "来宾",
"key": "L"
},
{
"name": "莱芜",
"key": "L"
},
{
"name": "廊坊",
"key": "L"
},
{
"name": "乐山",
"key": "L"
},
{
"name": "凉山",
"key": "L"
}
,
{
"name": "连云港",
"key": "L"
}
,
{
"name": "聊城",
"key": "L"
}
,
{
"name": "辽阳",
"key": "L"
}
,
{
"name": "辽源",
"key": "L"
}
,
{
"name": "丽江",
"key": "L"
}
,
{
"name": "临沧",
"key": "L"
}
,
{
"name": "临汾",
"key": "L"
}
,
{
"name": "临夏",
"key": "L"
}
,
{
"name": "临沂",
"key": "L"
}
,
{
"name": "林芝",
"key": "L"
}
,
{
"name": "丽水",
"key": "L"
}
,
{
"name": "六安",
"key": "L"
}
,
{
"name": "六盘水",
"key": "L"
}
,
{
"name": "柳州",
"key": "L"
}
,
{
"name": "陇南",
"key": "L"
}
,
{
"name": "龙岩",
"key": "L"
}
,
{
"name": "娄底",
"key": "L"
}
,
{
"name": "漯河",
"key": "L"
}
,
{
"name": "洛阳",
"key": "L"
},
{
"name": "泸州",
"key": "L"
},
{
"name": "吕梁",
"key": "L"
}
],
"M": [
{
"name": "马鞍山",
"key": "M"
}
,
{
"name": "茂名",
"key": "M"
}
,
{
"name": "眉山",
"key": "M"
}
,
{
"name": "梅州",
"key": "M"
}
,
{
"name": "绵阳",
"key": "M"
}
,
{
"name": "牡丹江",
"key": "M"
}
],
"N": [
{
"name": "南京",
"key": "N"
},
{
"name": "南昌",
"key": "N"
},
{
"name": "南宁",
"key": "N"
},
{
"name": "南充",
"key": "N"
},
{
"name": "南平",
"key": "N"
},
{
"name": "南通",
"key": "N"
},
{
"name": "南阳",
"key": "N"
}
,
{
"name": "那曲",
"key": "N"
}
,
{
"name": "内江",
"key": "N"
}
,
{
"name": "宁德",
"key": "N"
}
,
{
"name": "怒江",
"key": "N"
}
],
"P": [
{
"name": "盘锦",
"key": "P"
}
,
{
"name": "攀枝花",
"key": "P"
}
,
{
"name": "平顶山",
"key": "P"
}
,
{
"name": "平凉",
"key": "P"
}
,
{
"name": "萍乡",
"key": "P"
}
,
{
"name": "莆田",
"key": "P"
}
,
{
"name": "濮阳",
"key": "P"
}
],
"Q": [
{
"name": "青岛",
"key": "Q"
},
{
"name": "黔东南",
"key": "Q"
},
{
"name": "黔南",
"key": "Q"
},
{
"name": "黔西南",
"key": "Q"
},
{
"name": "庆阳",
"key": "Q"
},
{
"name": "清远",
"key": "Q"
},
{
"name": "秦皇岛",
"key": "Q"
}
,
{
"name": "钦州",
"key": "Q"
}
,
{
"name": "齐齐哈尔",
"key": "Q"
}
,
{
"name": "泉州",
"key": "Q"
}
,
{
"name": "曲靖",
"key": "Q"
}
,
{
"name": "衢州",
"key": "Q"
}
],
"R": [
{
"name": "日喀则",
"key": "R"
},
{
"name": "日照",
"key": "R"
}
]
,
"S": [
{
"name": "上海",
"key": "S"
},
{
"name": "深圳",
"key": "S"
},
{
"name": "苏州",
"key": "S"
},
{
"name": "沈阳",
"key": "S"
},
{
"name": "石家庄",
"key": "S"
},
{
"name": "三门峡",
"key": "S"
},
{
"name": "三明",
"key": "S"
}
,
{
"name": "三亚",
"key": "S"
}
,
{
"name": "商洛",
"key": "S"
}
,
{
"name": "商丘",
"key": "S"
}
,
{
"name": "上饶",
"key": "S"
}
,
{
"name": "山南",
"key": "S"
}
,
{
"name": "汕头",
"key": "S"
}
,
{
"name": "汕尾",
"key": "S"
}
,
{
"name": "韶关",
"key": "S"
}
,
{
"name": "绍兴",
"key": "S"
}
,
{
"name": "邵阳",
"key": "S"
}
,
{
"name": "十堰",
"key": "S"
}
,
{
"name": "朔州",
"key": "S"
}
,
{
"name": "四平",
"key": "S"
}
,
{
"name": "绥化",
"key": "S"
}
,
{
"name": "遂宁",
"key": "S"
}
,
{
"name": "随州",
"key": "S"
}
,
{
"name": "娄底",
"key": "S"
}
,
{
"name": "宿迁",
"key": "S"
}
,
{
"name": "宿州",
"key": "S"
}
],
"T": [
{
"name": "天津",
"key": "T"
},
{
"name": "太原",
"key": "T"
},
{
"name": "泰安",
"key": "T"
},
{
"name": "泰州",
"key": "T"
},
{
"name": "唐山",
"key": "T"
},
{
"name": "天水",
"key": "T"
},
{
"name": "铁岭",
"key": "T"
}
,
{
"name": "铜川",
"key": "T"
}
,
{
"name": "通化",
"key": "T"
}
,
{
"name": "通辽",
"key": "T"
}
,
{
"name": "铜陵",
"key": "T"
}
,
{
"name": "铜仁",
"key": "T"
}
,
{
"name": "台湾",
"key": "T"
}
]
,
"W": [
{
"name": "武汉",
"key": "W"
},
{
"name": "乌鲁木齐",
"key": "W"
},
{
"name": "无锡",
"key": "W"
},
{
"name": "威海",
"key": "W"
},
{
"name": "潍坊",
"key": "W"
},
{
"name": "文山",
"key": "W"
},
{
"name": "温州",
"key": "W"
}
,
{
"name": "乌海",
"key": "W"
}
,
{
"name": "芜湖",
"key": "W"
}
,
{
"name": "乌兰察布",
"key": "W"
}
,
{
"name": "武威",
"key": "W"
}
,
{
"name": "梧州",
"key": "W"
}
],
"X": [
{
"name": "厦门",
"key": "X"
},
{
"name": "西安",
"key": "X"
},
{
"name": "西宁",
"key": "X"
},
{
"name": "襄樊",
"key": "X"
},
{
"name": "湘潭",
"key": "X"
},
{
"name": "湘西",
"key": "X"
},
{
"name": "咸宁",
"key": "X"
}
,
{
"name": "咸阳",
"key": "X"
}
,
{
"name": "孝感",
"key": "X"
}
,
{
"name": "邢台",
"key": "X"
}
,
{
"name": "新乡",
"key": "X"
}
,
{
"name": "信阳",
"key": "X"
}
,
{
"name": "新余",
"key": "X"
}
,
{
"name": "忻州",
"key": "X"
}
,
{
"name": "西双版纳",
"key": "X"
}
,
{
"name": "宣城",
"key": "X"
}
,
{
"name": "许昌",
"key": "X"
}
,
{
"name": "徐州",
"key": "X"
}
,
{
"name": "香港",
"key": "X"
}
,
{
"name": "锡林郭勒",
"key": "X"
}
,
{
"name": "兴安",
"key": "X"
}
]
,
"Y": [
{
"name": "银川",
"key": "Y"
},
{
"name": "雅安",
"key": "Y"
},
{
"name": "延安",
"key": "Y"
},
{
"name": "延边",
"key": "Y"
},
{
"name": "盐城",
"key": "Y"
},
{
"name": "阳江",
"key": "Y"
},
{
"name": "阳泉",
"key": "Y"
}
,
{
"name": "扬州",
"key": "Y"
}
,
{
"name": "烟台",
"key": "Y"
}
,
{
"name": "宜宾",
"key": "Y"
}
,
{
"name": "宜昌",
"key": "Y"
}
,
{
"name": "宜春",
"key": "Y"
}
,
{
"name": "营口",
"key": "Y"
}
,
{
"name": "益阳",
"key": "Y"
}
,
{
"name": "永州",
"key": "Y"
}
,
{
"name": "岳阳",
"key": "Y"
}
,
{
"name": "榆林",
"key": "Y"
}
,
{
"name": "运城",
"key": "Y"
}
,
{
"name": "云浮",
"key": "Y"
}
,
{
"name": "玉树",
"key": "Y"
}
,
{
"name": "玉溪",
"key": "Y"
}
,
{
"name": "玉林",
"key": "Y"
}
],
"Z": [
{
"name": "杂多县",
"key": "Z"
},
{
"name": "赞皇县",
"key": "Z"
},
{
"name": "枣强县",
"key": "Z"
},
{
"name": "枣阳市",
"key": "Z"
},
{
"name": "枣庄",
"key": "Z"
},
{
"name": "泽库县",
"key": "Z"
},
{
"name": "增城市",
"key": "Z"
}
,
{
"name": "曾都区",
"key": "Z"
}
,
{
"name": "泽普县",
"key": "Z"
}
,
{
"name": "泽州县",
"key": "Z"
}
,
{
"name": "札达县",
"key": "Z"
}
,
{
"name": "扎赉特旗",
"key": "Z"
}
,
{
"name": "扎兰屯市",
"key": "Z"
}
,
{
"name": "扎鲁特旗",
"key": "Z"
}
,
{
"name": "扎囊县",
"key": "Z"
}
,
{
"name": "张北县",
"key": "Z"
}
,
{
"name": "张店区",
"key": "Z"
}
,
{
"name": "章贡区",
"key": "Z"
}
,
{
"name": "张家港",
"key": "Z"
}
,
{
"name": "张家界",
"key": "Z"
}
,
{
"name": "张家口",
"key": "Z"
}
,
{
"name": "漳平市",
"key": "Z"
}
,
{
"name": "漳浦县",
"key": "Z"
}
,
{
"name": "章丘市",
"key": "Z"
}
,
{
"name": "樟树市",
"key": "Z"
}
,
{
"name": "张湾区",
"key": "Z"
},
{
"name": "彰武县",
"key": "Z"
},
{
"name": "漳县",
"key": "Z"
},
{
"name": "张掖",
"key": "Z"
},
{
"name": "漳州",
"key": "Z"
},
{
"name": "长子县",
"key": "Z"
}
,
{
"name": "湛河区",
"key": "Z"
}
,
{
"name": "湛江",
"key": "Z"
}
,
{
"name": "站前区",
"key": "Z"
}
,
{
"name": "沾益县",
"key": "Z"
}
,
{
"name": "诏安县",
"key": "Z"
},
{
"name": "召陵区",
"key": "Z"
},
{
"name": "昭平县",
"key": "Z"
},
{
"name": "肇庆",
"key": "Z"
},
{
"name": "昭通",
"key": "Z"
},
{
"name": "赵县",
"key": "Z"
}
]
}
]
}
module.exports = city;The above is all the code, you can deploy it in your own project.
The above is the entire content of this article. I hope it will be helpful to everyone's study. For more related content, please pay attention to the PHP Chinese website!
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