解决elementui 的省市区级联选择器数据不回显问题

     上周写了一个省市区三级联动的地址选择组件，今天测试发现了一个大问题，那就是我可以正常提交地址是没错，可是当我后端返回了数据，我要点击编辑的时候，它并不会自动就给我绑定上去。

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    问题：地址选择器数据不回显。

    解决：用一个props，每从外面接收一个address(province,city,area)，让它三个子项对应好三级，一个个绑上去就好啦！~

最终的写法：

一、 封装vue组件

<template>
  <el-form ref="form" :model="form" label-width="120px">
    <el-row>
      <el-select v-model="form.province" placeholder="请选择省" @change="changePro" >
        <el-option v-for="item in addressData" :key="item.code" :label="item.name" :value="item.name">
        el-option>
      el-select>
      <el-select v-model="form.city" placeholder="请选择市" @change="changeCity">
        <el-option v-for="item in cityData" :key="item.code" :label="item.name" :value="item.name">
        el-option>
      el-select>
      <el-select v-model="form.district" placeholder="请选择区" @change="changeArea">
        <el-option v-for="item in areaData" :key="item.code" :label="item.name" :value="item.name">
        el-option>
      el-select>
      <el-input placeholder="详细地址" v-model="form.detail" style="width:200px;" clearable>el-input>
    el-row>
    
  el-form>
template>
 
<script>
import address from "@/utils/address/address.json"; //全国省市区街道数据
export default {
  data() {
    return {
      //  省数据
      addressData: [],
      //  市数据
      cityData: [],
      // 区数据
      areaData: [],
    };
  },
  props: {
    // 街道数据
    form: {
      province: "",
      // 市
      city: "",
      // 区
      district: "",
      //详细地址
      detail: "",
    }
  },
  created() {
    // 省份数据初始化
    this.addressData = address;
    // console.log("this.form",this.form)
 
    if (this.form.province != "") {
      let cityData = this.addressData.filter(item => item.name == this.form.province)
      if (cityData.length) {
        this.cityData = cityData[0].children
 
        let areaData = this.cityData.filter(item => item.name == this.form.city)
        if (areaData.length) {
          this.areaData = areaData[0].children
        }
      }
    }
  },
  computed: {
    //选择结果
    result() {
      if (!this.form.district) {
        return ''
      } else if (this.form.district && this.form.detail) {
        return '' + this.form.province + "," + this.form.city + "," + this.form.district + "," + this.form.detail
      } else {
        return '' + this.form.province + "," + this.form.city + "," + this.form.district
      }
    }
  },
  methods: {
    reset() {
      this.form = {
        // 省
        province: "",
        // 市
        city: "",
        // 区
        district: "",
        //详细地址
        detail: "",
      }
    },
    // 省份更改
    changePro(e) {
      // 从省中过滤出市的数据
      this.cityData = this.addressData.filter((item) => {
        return item.name == e;
      })[0].children;
      // 省发生改变的时候 清空输入框市区街道的内容
 
      this.form.district = "";
      this.form.city = this.cityData[0].name;
      // 省发生更改时 该表空区街道数据的内容
      this.areaData = this.cityData[0].children;
      this.form.district = this.areaData[0].name
    },
    // 市更改
    changeCity(e) {
      // 获取到区的数据
      this.areaData = this.cityData.filter(
        (item) => item.name == e
      )[0].children;
      // 清空数据后面对应数组的数据
      this.form.district = this.areaData[0].name;
    },
    // 区更改
    changeArea(e) {
      let temp = this.areaData.filter((item) => item.name == e);
      // 获取到区的code码
      this.form.regionalNumber = temp[0].code;
      // 获取到街道的数据
      this.jdData = this.areaData.filter((item) => item.name == e)[0].children;
    },
  },
};
script>
 
<style lang="scss" rel="stylesheet/scss" scoped>
.el-row {
  display: inline;
}
 
.el-row {
  display: inline-flex;
  flex: auto;
 
  .el-select {
    margin: 0 20px 0 0;
    width: 122px;
  }
}
style>

二、在页面中引用 

      <el-row>
        <el-col>
          <el-form-item label="联系地址" prop="address" v-model="ruleForm.address">
            <checkAddress v-model="ruleForm.address" :form="ruleForm.address" ref="address"/>
          el-form-item>
        el-col>
      el-row>

      <el-table-column  prop="address" label="联系地址">
          <template slot-scope="scope">
            <span v-for="(item,index) in scope.row.address" :key="index" :label="item">
              <span>
                {{item}}
              span>
            span>
          template>
      el-table-column>

  address: {
                  // 省
                  province: "",
                  // 市
                  city: "",
                  // 区
                  district: "",
                  //详细地址
                  detail:""
                },//联系地址

    watch:{
      ruleForm:{
        // deep:true,
        handler(){
          this.ruleForm.address=this.$refs.address.form
          console.log(this.ruleForm.address)
        }
      }

created(){
        if(this.rowData.contactType=="ADDRESS"){
          this.ruleForm.address.province=this.rowData.address.province
          this.ruleForm.address.city=this.rowData.address.city
          this.ruleForm.address.district=this.rowData.address.district
          this.ruleForm.address.detail=this.rowData.address.detail
        }
}

 三、去网上找个Address.json文件放进去就好了

就这样愉快地解决问题啦！从此点击编辑，相对应的地址数据会回显。

四、如果是多个填写项，需要时让他们一一对应

那么使用代码也需要进行改进

            <el-row>
              <el-col>
                <el-form-item label="联系地址" prop="address"  v-model="item.address">
                  
                  <checkAddress ref="address"  v-model="item.address" :key="index" :form="item.address"/>
                el-form-item>
              el-col>
            el-row>

                address: {
                  // 省
                  province: "",
                  // 市
                  city: "",
                  // 区
                  district: "",
                  //详细地址
                  detail:""
                },//联系地址

            if(item.contactType=="ADDRESS"){
              current.address.province=item.contactTypeFlex1
              current.address.city=item.contactTypeFlex2
              current.address.district=item.contactTypeFlex3
              current.address.detail=item.contactTypeFlex34
            }
            this.tempList.push(current)