本文实例为大家分享了Vue实现省市区级联下拉选择框的具体代码，供大家参考，具体内容如下
以（Vue下拉选择框Select组件二）为基础实现省市区级联下拉选择框组件
（业务需要，固定省份选择为贵州，没有此业务，不传disabled属性即可）
效果图如下：
①创建级联下拉选择Cascader.vue组件
<template>
<div class="m-cascader-wrap">
<Select
class="mr10"
:style="`z-index: ${zIndex};`"
mode="region"
:disabled="true"
:selectData="provinceData"
:selValue="address.province"
:width="84"
placeholder="请选择省"
@getValue="getProvinceCode" />
<Select
class="mr10"
:style="`z-index: ${zIndex};`"
mode="region"
:selectData="cityData"
:selValue="address.city"
:width="172"
placeholder="请选择市"
@getValue="getCityCode" />
<Select
mode="region"
:style="`z-index: ${zIndex};`"
:selectData="areaData"
:selValue="address.area"
:width="172"
placeholder="请选择区"
@getValue="getAreaCode" />
</div>
</template>
<script>
import Select from '@/components/Select'
import { dictByType } from '@/api/index'
export default {
name: 'Cascader',
components: {
Select
},
props: {
selectedAddress: { // 省市区初始值
type: Object,
default: () => {
return {}
}
},
zIndex: {
type: Number,
default: 1
}
},
data () {
return {
provinceData: [
{
dictVal: '贵州省',
dictKey: 'P29'
}
],
cityData: [],
areaData: [],
regionParams: {
type: '1',
parentDictKey: ''
},
address: {
province: 'P29',
city: this.selectedAddress.city || '',
area: this.selectedAddress.area || ''
},
addressName: {
provinceName: '贵州省',
cityName: '',
areaName: ''
},
initialCity: true
}
},
created () {
this.getCity('P29')
console.log('address:', this.address)
},
methods: {
getCity (key) { // 获取市数据
this.regionParams.parentDictKey = key
dictByType(this.regionParams).then(res => {
console.log('city-res:', res)
if (res.message.code === 0) {
if (res.data.dataList) {
this.cityData = res.data.dataList
if (this.initialCity && this.address.city) {
this.initialCity = false
this.cityData.forEach(item => {
if (item.dictKey === this.address.city) {
this.getArea(item.dictKey)
}
})
}
console.log('cityData:', this.cityData)
}
}
})
},
getArea (key) { // 获取区数据
this.regionParams.parentDictKey = key
dictByType(this.regionParams).then(res => {
console.log('area-res:', res)
if (res.message.code === 0) {
if (res.data.dataList) {
this.areaData = res.data.dataList
console.log('areaData:', this.areaData)
}
}
})
},
getProvinceCode (name, key) {
console.log('province:', name, key)
},
getCityCode (name, key) {
console.log('city:', name, key)
this.address.city = key
this.addressName.cityName = name
this.$emit('getAddress', {}, {})
// 获取区下拉列表
this.getArea(key)
},
getAreaCode (name, key) {
console.log('area:', name, key)
this.address.area = key
this.addressName.areaName = name
this.$emit('getAddress', this.address, this.addressName)
}
}
}
</script>
<style lang="less" scoped>
.m-cascader-wrap {
display: inline-block;
width: 449px;
height: 40px;
line-height: 40px;
}
</style>②在要使用的页面引入：
<Cascader
:selectedAddress="register"
mode="region"
:zIndex="997"
@getAddress="getRegisterAddress" />
import Cascader from '@/components/Cascader'
components: {
Cascader
},
data () {
return {
register: {
province: this.data.registerProvinceCode,
city: this.data.registerCityCode,
area: this.data.registerAreaCode
} || {},
}
}
methods: {
getRegisterAddress (address, addressName) {
console.log('register-address:', address)
this.register = address
if (JSON.stringify(addressName) !== '{}') { // 用于提交表单
this.addParams.registerProvinceName = addressName.provinceName
this.addParams.registerCityName = addressName.cityName
this.addParams.registerAreaName = addressName.areaName
}
if (JSON.stringify(address) !== '{}') { // 用于校验下拉表单是否未选择
this.checkFocus('register')
}
}
}以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持Devmax。