Vue動態數據實現 el-select 多級聯動、數據回顯方式
動態數據 el-select 多級聯動、數據回顯
父組件
<ProviderCategory v-model="classificationId"></ProviderCategory>
import ProviderCategory from './ProviderCategory'
<script>
import ProviderCategory from './ProviderCategory'
export default {
components: {
ProviderCategory
},
data() {
return {
classificationId:111
}
},
</script>
子組件
<template>
<div>
<el-select class="form-width-160" v-for="(item,idx) in selectedListArr.length" :key="idx"
v-model="selectedValueArr[idx]"
@change="(value)=>changeSelectData(value, idx )"
value-key="id"
>
<el-option v-for="item of selectedListArr[idx]"
:key="`${item.id}${idx}`" :label="item.categoryName"
:value="item"></el-option>
</el-select>
</div>
</template>
<script>
export default {
data () {
return {
classificationList: [],//一級目錄的數據，其實就是總的數據
selectedListArr: [],//二維數組，每一級目錄的數據存入當前下標
selectedValueArr: [],//一維數組，選中數據組成的數組對象
}
},
props:{
value : ''
},
created () {
console.log(this.value)//父節點傳過來的數據
this.getGoodsCategoryList()//初始化數據獲取所有的數據
},
methods: {
//this.value如果有數據，調用該方法
findId(arr1,id){//數據回顯
var temp = []
var arrId=[];
let newArr=[];
var forFn = function (arr, id) {
for (var i = 0; i < arr.length; i++) {
var item = arr[i]
if (item.id === id) {
newArr.unshift(arr);//二維數組，每一級目錄的數據存入當前下標
temp.unshift(item);//一維數組，選中數據組成的數組對象
arrId.unshift(id);//選中數據的id，包括父id
forFn(arr1, item.pId)
break
} else {
if (item.childNodes) {
forFn(item.childNodes, id)
}
}
}
}
forFn(arr1, id)
this.selectedListArr = newArr;
this.selectedValueArr = temp;
console.log(newArr,"測試數據")
console.log(temp,"數據")
console.log(arrId,"id數據")
// return temp
},
//加載數據
initSelectArr(index){
if(index == 0) {//當下標為0時，其實就是新增的數據
this.selectedListArr = [this.classificationList];
this.selectedValueArr=[''];
}else{//否則對數據進行處理，
this.selectedListArr = this.selectedListArr.slice(0, index+1);
this.selectedValueArr = this.selectedValueArr.slice(0, index+1);
}
},
//選中數據後觸發的方法
changeSelectData(item, idx) {
console.log(item, idx);
this.initSelectArr(idx);
this.selectedValueArr[idx] = item;
if(item.childNodes && item.childNodes.length>0){
this.selectedListArr.push(item.childNodes);
this.selectedValueArr.push('');
}
},
//初始化數據獲取所有的數據
getGoodsCategoryList() {
let childNodes = [];//模擬後端傳過來的數據，在下面
this.classificationList = childNodes;
this.initSelectArr(0);//新增數據，頁面加載
if(this.value && this.value !== ''){
this.findId(this.classificationList , this.value)
}
// this.$http.get('/test/testData', {
// params: {}
// }).then(res => {
// res = res.data
// if (res.code === 200) {
// this.classificationList = res.data.childNodes
// } else {
// this.$message.error(res.msg)
// }
// }).catch(err => {
// console.log(err)
// })
}
}
}
</script>
<style scoped>
</style>
//測試模擬數據
childNodes = [
{
categoryImg: "https://www.baidu.com/img/bd_logo1.png",
categoryName: "上衣",
id:2,
pId: 1,
sort: 1,
childNodes: [
{
categoryImg: "https://www.baidu.com/img/bd_logo1.png",
categoryName: "短袖",
haveGoods: true,
id: 5,
pId: 2,
sort: 1,
childNodes:[
{
id:111,
pId: 5,
sort: 1,
categoryImg: "https://www.baidu.com/img/bd_logo1.png",
categoryName: "短袖褲子",
childNodes: []
},
{
id:122,
pId: 5,
sort: 1,
categoryImg: "https://www.baidu.com/img/bd_logo1.png",
categoryName: "短袖鞋子",
childNodes: []
}
],
},
{
categoryImg: "https://www.baidu.com/img/bd_logo1.png",
categoryName: "西裝",
haveGoods: false,
id: 6,
pId: 2,
sort: 1,
childNodes:[
{
id:112,
pId: 6,
sort: 1,
categoryImg: "https://www.baidu.com/img/bd_logo1.png",
categoryName: "西裝褲子",
childNodes: []
},
{
id:121,
pId: 6,
sort: 1,
categoryImg: "https://www.baidu.com/img/bd_logo1.png",
categoryName: "西裝鞋子",
childNodes: []
}
],
}
]
},
{
id:11,
pId: 1,
sort: 1,
categoryImg: "https://www.baidu.com/img/bd_logo1.png",
categoryName: "褲子",
childNodes: [
{
categoryImg: "https://www.baidu.com/img/bd_logo1.png",
categoryName: "牛仔",
haveGoods: true,
id: 112222,
pId: 11,
sort: 1,
childNodes:[],
},
]
},
{
id:12,
pId: 1,
sort: 1,
categoryImg: "https://www.baidu.com/img/bd_logo1.png",
categoryName: "鞋子",
childNodes: [
{
categoryImg: "https://www.baidu.com/img/bd_logo1.png",
categoryName: "耐克",
haveGoods: true,
id: 1121,
pId: 12,
sort: 1,
childNodes:[
{
categoryImg: "https://www.baidu.com/img/bd_logo1.png",
categoryName: "西牛仔",
haveGoods: true,
id: 11211,
pId: 1121,
sort: 1,
childNodes:[],
},
],
},
{
categoryImg: "https://www.baidu.com/img/bd_logo1.png",
categoryName: "阿迪",
haveGoods: true,
id: 1122,
pId: 12,
sort: 1,
childNodes:[],
},
]
}
];
//數據回顯
findId(arr, id) { //將選中的數組和id組成一個數組
for (let i = 0; i < arr.length; i++) {
if (arr[i].id === id) {
return [
[arr, i]
]
break
}
}
let c = []
arr.forEach((item, i) => {
let r = this.findId(item.childNodes || [], id)
if (r && r.length) {
c = [
[arr, i]
].concat(r)
}
})
// console.log(c,"回顯數據")
return c
},
多級聯動select菜單（易懂）
<div id="checkbox">
<select v-model="selected" @change='func()'>
<option value='' disabled selected style='display:none;'>選擇1</option>
<option v-for="option in options" v-bind:value="option.value">
{{ option.text }}
</option>
</select>
<select name="" id="">
<option value='' disabled selected style='display:none;'>選擇2</option>
<option v-for="option in options2" v-bind:value="option.text">
{{ option.text }}
</option>
</select>
</div>
<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script>
new Vue({
el: '#checkbox',
data: {
selected: '',
options: [//一級菜單
{ text: 'A', value: 'A' },
{ text: 'B', value: 'B' },
{ text: 'C', value: 'C' }
],
options2:[],//二級菜單
},
methods:{
func:function(){//綁定事件，給二級菜單賦值
switch(this.selected){
case 'A':this.options2=[{text:'A-1'},{text:'A-2'},{text:'A-3'}];break;
case 'B':this.options2=[{text:'B-1'},{text:'B-2'},{text:'B-3'}];break;
case 'C':this.options2=[{text:'C-1'},{text:'C-2'},{text:'C-3'}];break;
}
}
}
})
</script>
以上為個人經驗，希望能給大傢一個參考，也希望大傢多多支持WalkonNet。
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