您好,登錄后才能下訂單哦!
怎么在vue中實(shí)現(xiàn)無限層級(jí)多選菜單功能?針對(duì)這個(gè)問題,這篇文章詳細(xì)介紹了相對(duì)應(yīng)的分析和解答,希望可以幫助更多想解決這個(gè)問題的小伙伴找到更簡單易行的方法。
<template> <div> <div > <span v-for="o in levelNum"> </span> <i v-if="item.list" :class="open ? openClass : closeClass" @click="showSub" ></i> <span v-else> </span> <span> <a @click="changeState"> <img src="./../assets/selectedAll.png" v-if="selectedState === 'all'" width="15px" height="15px"/> <img src="./../assets/selectedSub.png" v-if="selectedState === 'sub'" width="15px" height="15px"/> <img src="./../assets/selectedNull.png" v-if="selectedState === 'null'" width="15px" height="15px"/> </a> </span> <span>{{item.name}}</span> </div> <component v-show="open" :is="node" :item="o" :state="stateSub" v-for="o of item.list" :key="o.key" :level="levelNum" v-on:changeToPar="changeBySub"> </component> </div> </template> <script> export default { name: 'wTree', props: ['item', 'level', 'state'], data () { return { open: true, node: 'wTree', // 控制菜單開關(guān)的 selected: false, // 選中的情況下 selectedState: 'null', // 子組件被選中的情況下向上傳遞all/sub/null originInfo: 'create', // 組件信息源,create/parent/children/this openClass: 'el-icon-caret-bottom', closeClass: 'el-icon-caret-right', selectClass: 'el-icon-check', selectBg: '#1c8de0', list: [], createSwitch: true } }, computed: { levelNum () { return (this.level + 1) }, stateSub () { return { selected: this.selected, originInfo: this.originInfo } } }, methods: { showSub () { this.open = !this.open }, changeState () { if (this.selected) { this.selected = false this.selectedState = 'null' this.originInfo = 'this' for (let o of this.list) { o.selectedState = 'null' } } else { this.selected = true this.selectedState = 'all' this.originInfo = 'this' for (let o of this.list) { o.selectedState = 'all' } } let data = { id: this.item.menuId, selectedState: this.selectedState, originInfo: 'parent' } this.$emit('changeToPar', data) }, changeBySub (data) { // 如果是父組件true,判斷狀態(tài),未被選中,添加id到list,selectSub=true,通知父組件,添加store的數(shù)組中,選中通知父組件,this.list.length=this.length狀態(tài)改為selected // 修改自身狀態(tài),添加list let temp = data if (data.originInfo === 'create') { this.list.push(data) } else { this.originInfo = 'parent' let stateNull = 'null' let stateAll = 'all' let stateSub = 'sub' for (let o of this.list) { if (o.id === temp.id) { o.selectedState = temp.selectedState } if (o.selectedState !== 'all') { stateAll = null } if (o.selectedState !== 'null') { stateNull = null } } if (stateNull) { this.selectedState = stateNull this.selected = false } else if (stateAll) { this.selectedState = stateAll this.selected = true } else { this.selectedState = stateSub this.selected = true } let data = { id: this.item.menuId, selectedState: this.selectedState, originInfo: 'parent' } this.$emit('changeToPar', data) } } }, watch: { selected () { // 初始化 if (this.originInfo === 'create') { // 不改變值 } else { // 改變值******** if (this.selected) { // 添加值 this.$store.commit('PUSH_CHECK_LIST', this.item.menuId) } else { // 刪除值 this.$store.commit('SPLICE_CHECK_LIST', this.item.menuId) } } }, state () { // 子組件得到通知,如果狀態(tài)一直,不去改變,如果狀態(tài)不一致改變 if (this.state.originInfo === 'this') { this.originInfo = 'this' } if (this.originInfo === 'create') { this.originInfo = 'children' } else { if (this.state.originInfo !== 'parent') { if (this.state.selected) { this.selected = true this.selectedState = 'all' if (this.list !== []) { for (let o of this.list) { o.selectedState = 'all' } } } else { this.selected = false this.selectedState = 'null' if (this.list !== []) { for (let o of this.list) { o.selectedState = 'null' } } } } } }, list () { // 初始化數(shù)組 if (this.list.length === this.item.list.length) { let stateNull = 'null' let stateAll = 'all' let stateSub = 'sub' for (let o of this.list) { if (o.selectedState !== 'all') { stateAll = null } if (o.selectedState !== 'null') { stateNull = null } } if (stateNull) { this.selectedState = stateNull this.selected = false } else if (stateAll) { this.selectedState = stateAll this.selected = true } else { this.selectedState = stateSub this.selected = true } let data = { id: this.item.menuId, selectedState: this.selectedState, originInfo: 'create' } this.$emit('changeToPar', data) } } }, created () { // 初始化,把每個(gè)組件,從最底層添加到節(jié)點(diǎn)列表中,這樣每個(gè)子組件都在list中了,就是originInfo=create的情況下添加數(shù)組,就不用判斷數(shù)組長度,直接改變狀態(tài) if (this.createSwitch) { let i = this.$store.state.checkList.indexOf(this.item.menuId) console.log(!this.item.list) console.log('-----------------------初始化') if (!this.item.list) { if (i > -1) { this.selectedState = 'all' this.selected = true } else { this.selectedState = 'null' this.selected = false } let data = { id: this.item.menuId, selectedState: this.selectedState, originInfo: 'create' } this.$emit('changeToPar', data) this.originInfo = 'this' } this.createSwitch = false } console.log(this.state) console.log('----------------created') }, updated () { console.log('-------updated=======') let i = this.$store.state.checkList.indexOf(this.item.menuId) console.log(!this.item.list) console.log('-----------------------初始化') if (!this.item.list) { if (i > -1) { this.selectedState = 'all' this.selected = true } else { this.selectedState = 'null' this.selected = false } let data = { id: this.item.menuId, selectedState: this.selectedState, originInfo: 'parent' } this.$emit('changeToPar', data) this.originInfo = 'this' } }, mounted () { console.log('=========mounted-----') } } </script>
調(diào)用 orgList帶有層級(jí)的json數(shù)組
<w-tree v-for="o of orgList" :item="o" :level="0" :key="o.key"></w-tree>
Vue具體輕量級(jí)框架、簡單易學(xué)、雙向數(shù)據(jù)綁定、組件化、數(shù)據(jù)和結(jié)構(gòu)的分離、虛擬DOM、運(yùn)行速度快等優(yōu)勢,Vue中頁面使用的是局部刷新,不用每次跳轉(zhuǎn)頁面都要請(qǐng)求所有數(shù)據(jù)和dom,可以大大提升訪問速度和用戶體驗(yàn)。
關(guān)于怎么在vue中實(shí)現(xiàn)無限層級(jí)多選菜單功能問題的解答就分享到這里了,希望以上內(nèi)容可以對(duì)大家有一定的幫助,如果你還有很多疑惑沒有解開,可以關(guān)注億速云行業(yè)資訊頻道了解更多相關(guān)知識(shí)。
免責(zé)聲明:本站發(fā)布的內(nèi)容(圖片、視頻和文字)以原創(chuàng)、轉(zhuǎn)載和分享為主,文章觀點(diǎn)不代表本網(wǎng)站立場,如果涉及侵權(quán)請(qǐng)聯(lián)系站長郵箱:is@yisu.com進(jìn)行舉報(bào),并提供相關(guān)證據(jù),一經(jīng)查實(shí),將立刻刪除涉嫌侵權(quán)內(nèi)容。