How does the applet implement and call the region selector?-Mini Program Development-php.cn

The content of this article is about how to implement and call the region selector in the applet. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

region-widget.js

var api = require(&#39;../../../utils/api/index.js&#39;);var constants = require(&#39;../../../utils/api/lib/constants&#39;);var raw = require(&#39;../../../utils/citys&#39;);

Component({
  options: {
    multipleSlots: true
  },
  data: {
    select:[0,0],
    region: [Object.keys(raw), raw[Object.keys(raw)[0]]],
    province:"",
    city:""
  },
  properties: {
    target: {
      type: Array,
      value: [],
      observer: &#39;update&#39;
    }
  },
  methods: {
    update: function (newVal, oldVal) {
      if(!newVal || newVal.length < 2)return;      var province = newVal[0];      var city = newVal[1];      var region = this.data.region;      //update province
      var pro_index = region[0].indexOf(province);      if (pro_index < 0)return;
      region = [region[0], raw[province]];      //update city
      var city_index = region[1].indexOf(city);      if (city_index < 0) return;      this.setData({
        select: [pro_index,city_index],
        region: region,
        province: province,
        city: city
      })
    },
    bindChange: function (e) {
      if (!e.detail.value || e.detail.value.length <2)return;      var region = this.data.region;      var pro_index = e.detail.value[0];      var city_index = e.detail.value[1];      this.setData({
        province: region[0][pro_index],
        city: region[1][city_index]
      })      this.notify();
    },
    bindColumnChange: function (e) {
      if (e.detail.column === 0) {        var region = this.data.region;        var province = region[0][e.detail.value];        this.setData({ 
          region: [region[0], raw[province]] 
        });
      }
    },
    notify() {      this.triggerEvent(&#39;regionChange&#39;, { province: this.data.province, city: this.data.city }, {})
    }
  }
})

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region-widget.wxml

<picker 
  mode="multiSelector" 
  value="{{select}}" 
  range="{{region}}"
  bindchange="bindChange" 
  bindcolumnchange="bindColumnChange">
  <slot></slot></picker>

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city.js

var citys = {  &#39;北京市&#39;: [&#39;市辖区&#39;],  &#39;天津市&#39;: [&#39;市辖区&#39;],
  &#39;河北省&#39;: [&#39;石家庄市&#39;, &#39;唐山市&#39;, &#39;秦皇岛市&#39;, &#39;邯郸市&#39;, &#39;邢台市&#39;, &#39;保定市&#39;, &#39;张家口市&#39;, &#39;承德市&#39;, &#39;沧州市&#39;, 
          &#39;廊坊市&#39;, &#39;衡水市&#39;, &#39;省直辖县级行政区划&#39;], 
 &#39;山西省&#39;: [&#39;太原市&#39;, &#39;大同市&#39;, &#39;阳泉市&#39;, &#39;长治市&#39;, &#39;晋城市&#39;, &#39;朔州市&#39;, &#39;晋中市&#39;,
           &#39;运城市&#39;, &#39;忻州市&#39;, &#39;临汾市&#39;, &#39;吕梁市&#39;],
 &#39;内蒙古自治区&#39;: [&#39;呼和浩特市&#39;, &#39;包头市&#39;, &#39;乌海市&#39;, &#39;赤峰市&#39;, &#39;通辽市&#39;, &#39;鄂尔多斯市&#39;, &#39;呼伦贝尔市&#39;,
                &#39;巴彦淖尔市&#39;, &#39;乌兰察布市&#39;, &#39;兴安盟&#39;, &#39;锡林郭勒盟&#39;, &#39;阿拉善盟&#39;],  
 &#39;辽宁省&#39;: [&#39;沈阳市&#39;, &#39;大连市&#39;, &#39;鞍山市&#39;, &#39;抚顺市&#39;, &#39;本溪市&#39;, &#39;丹东市&#39;, &#39;锦州市&#39;, &#39;营口市&#39;, &#39;阜新市&#39;, &#39;辽阳市&#39;,
             &#39;盘锦市&#39;, &#39;铁岭市&#39;, &#39;朝阳市&#39;, &#39;葫芦岛市&#39;],  
  &#39;吉林省&#39;: [&#39;长春市&#39;, &#39;吉林市&#39;, &#39;四平市&#39;, &#39;辽源市&#39;, &#39;通化市&#39;, &#39;白山市&#39;, &#39;松原市&#39;, &#39;白城市&#39;, &#39;延边朝鲜族自治州&#39;], 
 &#39;黑龙江省&#39;: [&#39;哈尔滨市&#39;, &#39;齐齐哈尔市&#39;, &#39;鸡西市&#39;, &#39;鹤岗市&#39;, &#39;双鸭山市&#39;, &#39;大庆市&#39;, &#39;伊春市&#39;, &#39;佳木斯市&#39;,
              &#39;七台河市&#39;, &#39;牡丹江市&#39;, &#39;黑河市&#39;, &#39;绥化市&#39;, &#39;大兴安岭地区&#39;], 
 &#39;上海市&#39;: [&#39;市辖区&#39;],  
 &#39;江苏省&#39;: [&#39;南京市&#39;, &#39;无锡市&#39;, &#39;徐州市&#39;, &#39;常州市&#39;, &#39;苏州市&#39;, &#39;南通市&#39;, &#39;连云港市&#39;, &#39;淮安市&#39;, &#39;盐城市&#39;, &#39;扬州市&#39;, 
           &#39;镇江市&#39;, &#39;泰州市&#39;, &#39;宿迁市&#39;],  
 &#39;浙江省&#39;: [&#39;杭州市&#39;, &#39;宁波市&#39;, &#39;温州市&#39;, &#39;嘉兴市&#39;, &#39;湖州市&#39;, &#39;绍兴市&#39;, &#39;金华市&#39;, &#39;衢州市&#39;, &#39;舟山市&#39;, &#39;台州市&#39;, 
           &#39;丽水市&#39;], 
 &#39;安徽省&#39;: [&#39;合肥市&#39;, &#39;芜湖市&#39;, &#39;蚌埠市&#39;, &#39;淮南市&#39;, &#39;马鞍山市&#39;, &#39;淮北市&#39;, &#39;铜陵市&#39;, &#39;安庆市&#39;, &#39;黄山市&#39;,
            &#39;滁州市&#39;, &#39;阜阳市&#39;, &#39;宿州市&#39;, &#39;六安市&#39;, &#39;亳州市&#39;, &#39;池州市&#39;, &#39;宣城市&#39;], 
 &#39;福建省&#39;: [&#39;福州市&#39;, &#39;厦门市&#39;, &#39;莆田市&#39;, &#39;三明市&#39;, &#39;泉州市&#39;, &#39;漳州市&#39;, &#39;南平市&#39;, &#39;龙岩市&#39;, &#39;宁德市&#39;],  
 &#39;江西省&#39;: [&#39;南昌市&#39;, &#39;景德镇市&#39;, &#39;萍乡市&#39;, &#39;九江市&#39;, &#39;新余市&#39;, &#39;鹰潭市&#39;, &#39;赣州市&#39;, &#39;吉安市&#39;, &#39;宜春市&#39;, &#39;抚州市&#39;,
            &#39;上饶市&#39;], 
   &#39;山东省&#39;: [&#39;济南市&#39;, &#39;青岛市&#39;, &#39;淄博市&#39;, &#39;枣庄市&#39;, &#39;东营市&#39;, &#39;烟台市&#39;, &#39;潍坊市&#39;, &#39;济宁市&#39;,
                 &#39;泰安市&#39;, &#39;威海市&#39;, &#39;日照市&#39;, &#39;莱芜市&#39;, &#39;临沂市&#39;, &#39;德州市&#39;, &#39;聊城市&#39;, &#39;滨州市&#39;, &#39;菏泽市&#39;], 
   &#39;河南省&#39;: [&#39;郑州市&#39;, &#39;开封市&#39;, &#39;洛阳市&#39;, &#39;平顶山市&#39;, &#39;安阳市&#39;, &#39;鹤壁市&#39;, &#39;新乡市&#39;, &#39;焦作市&#39;, &#39;濮阳市&#39;,
              &#39;许昌市&#39;, &#39;漯河市&#39;, &#39;三门峡市&#39;, &#39;南阳市&#39;, &#39;商丘市&#39;, &#39;信阳市&#39;, &#39;周口市&#39;, &#39;驻马店市&#39;, &#39;省直辖县级行政区划&#39;], 
   &#39;湖北省&#39;: [&#39;武汉市&#39;, &#39;黄石市&#39;, &#39;十堰市&#39;, &#39;宜昌市&#39;, &#39;襄阳市&#39;, &#39;鄂州市&#39;, &#39;荆门市&#39;, &#39;孝感市&#39;, &#39;荆州市&#39;, &#39;黄冈市&#39;,
             &#39;咸宁市&#39;, &#39;随州市&#39;, &#39;恩施土家族苗族自治州&#39;, &#39;省直辖县级行政区划&#39;],  
    &#39;湖南省&#39;: [&#39;长沙市&#39;, &#39;株洲市&#39;, &#39;湘潭市&#39;, &#39;衡阳市&#39;, &#39;邵阳市&#39;, &#39;岳阳市&#39;, &#39;常德市&#39;, &#39;张家界市&#39;, &#39;益阳市&#39;, &#39;郴州市&#39;,
               &#39;永州市&#39;, &#39;怀化市&#39;, &#39;娄底市&#39;, &#39;湘西土家族苗族自治州&#39;],  
    &#39;广东省&#39;: [&#39;广州市&#39;, &#39;韶关市&#39;, &#39;深圳市&#39;, &#39;珠海市&#39;, &#39;汕头市&#39;, &#39;佛山市&#39;, &#39;江门市&#39;, &#39;湛江市&#39;, &#39;茂名市&#39;, &#39;肇庆市&#39;,
              &#39;惠州市&#39;, &#39;梅州市&#39;, &#39;汕尾市&#39;, &#39;河源市&#39;, &#39;阳江市&#39;, &#39;清远市&#39;, &#39;东莞市&#39;, &#39;中山市&#39;, &#39;潮州市&#39;, &#39;揭阳市&#39;,
               &#39;云浮市&#39;], 
   &#39;广西壮族自治区&#39;: [&#39;南宁市&#39;, &#39;柳州市&#39;, &#39;桂林市&#39;, &#39;梧州市&#39;, &#39;北海市&#39;, &#39;防城港市&#39;, &#39;钦州市&#39;, &#39;贵港市&#39;, &#39;玉林市&#39;,
             &#39;百色市&#39;, &#39;贺州市&#39;, &#39;河池市&#39;, &#39;来宾市&#39;, &#39;崇左市&#39;], 
  &#39;海南省&#39;: [&#39;海口市&#39;, &#39;三亚市&#39;, &#39;三沙市&#39;, &#39;儋州市&#39;, &#39;省直辖县级行政区划&#39;],  
  &#39;重庆市&#39;: [&#39;市辖区&#39;, &#39;县&#39;],  
  &#39;四川省&#39;: [&#39;成都市&#39;, &#39;自贡市&#39;, &#39;攀枝花市&#39;, &#39;泸州市&#39;, &#39;德阳市&#39;, &#39;绵阳市&#39;, &#39;广元市&#39;, &#39;遂宁市&#39;, &#39;内江市&#39;, &#39;乐山市&#39;,
               &#39;南充市&#39;, &#39;眉山市&#39;, &#39;宜宾市&#39;, &#39;广安市&#39;, &#39;达州市&#39;, &#39;雅安市&#39;, &#39;巴中市&#39;, &#39;资阳市&#39;, &#39;阿坝藏族羌族自治州&#39;, 
               &#39;甘孜藏族自治州&#39;, &#39;凉山彝族自治州&#39;],  
    &#39;贵州省&#39;: [&#39;贵阳市&#39;, &#39;六盘水市&#39;, &#39;遵义市&#39;, &#39;安顺市&#39;, &#39;毕节市&#39;, &#39;铜仁市&#39;, &#39;黔西南布依族苗族自治州&#39;,
             &#39;黔东南苗族侗族自治州&#39;, &#39;黔南布依族苗族自治州&#39;], 
   &#39;云南省&#39;: [&#39;昆明市&#39;, &#39;曲靖市&#39;, &#39;玉溪市&#39;, &#39;保山市&#39;, &#39;昭通市&#39;, &#39;丽江市&#39;, &#39;普洱市&#39;, &#39;临沧市&#39;, &#39;楚雄彝族自治州&#39;,
             &#39;红河哈尼族彝族自治州&#39;, &#39;文山壮族苗族自治州&#39;, &#39;西双版纳傣族自治州&#39;, &#39;大理白族自治州&#39;, 
             &#39;德宏傣族景颇族自治州&#39;, &#39;怒江傈僳族自治州&#39;, &#39;迪庆藏族自治州&#39;],  
  &#39;西藏自治区&#39;: [&#39;拉萨市&#39;, &#39;日喀则市&#39;, &#39;昌都市&#39;, &#39;林芝市&#39;, &#39;山南市&#39;, &#39;那曲地区&#39;, &#39;阿里地区&#39;], 
   &#39;陕西省&#39;: [&#39;西安市&#39;, &#39;铜川市&#39;, &#39;宝鸡市&#39;, &#39;咸阳市&#39;, &#39;渭南市&#39;, &#39;延安市&#39;, &#39;汉中市&#39;, &#39;榆林市&#39;, &#39;安康市&#39;, &#39;商洛市&#39;],
  &#39;甘肃省&#39;: [&#39;兰州市&#39;, &#39;嘉峪关市&#39;, &#39;金昌市&#39;, &#39;白银市&#39;, &#39;天水市&#39;, &#39;武威市&#39;, &#39;张掖市&#39;, &#39;平凉市&#39;, &#39;酒泉市&#39;, &#39;庆阳市&#39;, 
              &#39;定西市&#39;, &#39;陇南市&#39;, &#39;临夏回族自治州&#39;, &#39;甘南藏族自治州&#39;], 
   &#39;青海省&#39;: [&#39;西宁市&#39;, &#39;海东市&#39;, &#39;海北藏族自治州&#39;, &#39;黄南藏族自治州&#39;, &#39;海南藏族自治州&#39;, &#39;果洛藏族自治州&#39;,
             &#39;玉树藏族自治州&#39;, &#39;海西蒙古族藏族自治州&#39;],  
    &#39;宁夏回族自治区&#39;: [&#39;银川市&#39;, &#39;石嘴山市&#39;, &#39;吴忠市&#39;, &#39;固原市&#39;, &#39;中卫市&#39;], 
  &#39;新疆维吾尔自治区&#39;: [&#39;乌鲁木齐市&#39;, &#39;克拉玛依市&#39;, &#39;吐鲁番市&#39;, &#39;哈密市&#39;, &#39;昌吉回族自治州&#39;,
                   &#39;博尔塔拉蒙古自治州&#39;, &#39;巴音郭楞蒙古自治州&#39;, &#39;阿克苏地区&#39;, &#39;克孜勒苏柯尔克孜自治州&#39;,
                    &#39;喀什地区&#39;, &#39;和田地区&#39;, &#39;伊犁哈萨克自治州&#39;, &#39;塔城地区&#39;, &#39;阿勒泰地区&#39;, &#39;自治区直辖县级行政区划&#39;], 
     &#39;台湾省&#39;: [&#39;台湾&#39;], 
      &#39;香港特别行政区&#39;: [&#39;香港&#39;], 
       &#39;澳门特别行政区&#39;: [&#39;澳门&#39;]
}module.exports = citys;

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Use it like this:

<region-widget target="{{select}}" bindregionChange="onRegionChange">
    <text>{{select[0]}}{{select[1]}}</text></region-widget>

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Page({
  data: {
      select:["",""]
  },
  onRegionChange:function(e){
    console.log(e.detail);
    this.setData({select: [e.detail.province, e.detail.city]})
  }  ...}

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