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本篇内容介绍了“Vue动态数据怎么实现el-select多级联动及数据回显”的有关知识,在实际案例的操作过程中,不少人都会遇到这样的困境,接下来就让小编带领大家学习一下如何处理这些情况吧!希望大家仔细阅读,能够学有所成!
父组件
<ProviderCategory v-model="classificationId"></ProviderCategory> import ProviderCategory from './ProviderCategory' <script> import ProviderCategory from './ProviderCategory' export default { components: { ProviderCategory }, data() { return { classificationId:111 } }, </script>
子组件
<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: [],//一级目录的数据,其实就是总的数据 selectedListArr: [],//二维数组,每一级目录的数据存入当前下标 selectedValueArr: [],//一维数组,选中数据组成的数组对象 } }, props:{ value : '' }, created () { console.log(this.value)//父节点传过来的数据 this.getGoodsCategoryList()//初始化数据获取所有的数据 }, methods: { //this.value如果有数据,调用该方法 findId(arr1,id){//数据回显 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);//二维数组,每一级目录的数据存入当前下标 temp.unshift(item);//一维数组,选中数据组成的数组对象 arrId.unshift(id);//选中数据的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,"测试数据") console.log(temp,"数据") console.log(arrId,"id数据") // return temp }, //加载数据 initSelectArr(index){ if(index == 0) {//当下标为0时,其实就是新增的数据 this.selectedListArr = [this.classificationList]; this.selectedValueArr=['']; }else{//否则对数据进行处理, this.selectedListArr = this.selectedListArr.slice(0, index+1); this.selectedValueArr = this.selectedValueArr.slice(0, index+1); } }, //选中数据后触发的方法 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(''); } }, //初始化数据获取所有的数据 getGoodsCategoryList() { let childNodes = [];//模拟后端传过来的数据,在下面 this.classificationList = childNodes; this.initSelectArr(0);//新增数据,页面加载 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>
//测试模拟数据 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: "短袖裤子", 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: "西装", 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: "西装裤子", childNodes: [] }, { id:121, pId: 6, sort: 1, categoryImg: "https://www.baidu.com/img/bd_logo1.png", categoryName: "西装鞋子", childNodes: [] } ], } ] }, { id:11, pId: 1, sort: 1, categoryImg: "https://www.baidu.com/img/bd_logo1.png", categoryName: "裤子", 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:[], }, ] } ];
//数据回显 findId(arr, id) { //将选中的数组和id组成一个数组 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,"回显数据") return c },
<div id="checkbox"> <select v-model="selected" @change='func()'> <option value='' disabled selected style='display:none;'>选择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;'>选择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: [//一级菜单 { text: 'A', value: 'A' }, { text: 'B', value: 'B' }, { text: 'C', value: 'C' } ], options2:[],//二级菜单 }, methods:{ func:function(){//绑定事件,给二级菜单赋值 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>
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