這次為大家帶來vue組件做出無限級多選菜單,vue組件做出無限級多選菜單的注意事項有哪些,下面就是實戰案例,一起來看一下。
wTree.vue
原理:每一個多選框都是一個節點,每個節點就是一個wTree元件,有父級(頂級level為0) ,有子級(底層list[]是空的),元件之間狀態傳遞是透過元件通訊傳遞,對於外部資料checkList數組的修改是透過store實現的。初始化從底層狀態傳遞到上層,一層一層傳遞。改變狀態,不同狀態改變,修改checklist陣列。大概就這個思路,以下是程式碼:
d477f9ce7bf77f53fbcf36bec1b69b7a e388a4556c0f65e1904146cc1a846bee ed101ace28eb2e83d02513ccb1648d2b 4f555254255129eed389abd755c7120a 54bdf357c58b8a65c66d7c19c8e4d114 b7dc181cef335d3aca7c2764a59d47d472ac96585ae54b6ae11f849d2649d9e6 4333e88ff3da098980eb64a766f698c6 54bdf357c58b8a65c66d7c19c8e4d114 45a2772a6b6107b401db3c9b82c049c2 0f52e3d84a33e3edc14d95af6e1e0d9e f4795b2a19418f35194557a89112fcf5 af950f290a4bf6954df9def7b42b0d6c 7f23ea73d0b6e0b57b4268f2114cd7c4 5db79b134e9f6b82c0b36e0489ee08ed 54bdf357c58b8a65c66d7c19c8e4d114 45a2772a6b6107b401db3c9b82c049c2{{item.name}}54bdf357c58b8a65c66d7c19c8e4d114 94b3e26ee717c64999d7867364b1b4a3 b41f8f9c6e4179cbe6e1c8b508f6b506 2724ec0ed5bf474563ac7616c8d7a3cd 94b3e26ee717c64999d7867364b1b4a3 21c97d3a051048b8e55e3c8f199a54b2 3f1c4e4b6b16bbbd69b2ee476dc4f83a export default { name: 'wTree', props: ['item', 'level', 'state'], data () { return { open: true, node: 'wTree', // 控制菜单开关的 selected: false, // 选中的情况下 selectedState: 'null', // 子组件被选中的情况下向上传递all/sub/null originInfo: 'create', // 组件信息源,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.$emit('changeToPar', data) }, changeBySub (data) { // 如果是父组件true,判断状态,未被选中,添加id到list,selectSub=true,通知父组件,添加store的数组中,选中通知父组件,this.list.length=this.length状态改为selected // 修改自身状态,添加list let temp = data if (data.originInfo === 'create') { this.list.push(data) } else { this.originInfo = 'parent' let stateNull = 'null' let stateAll = 'all' let stateSub = 'sub' for (let o of this.list) { if (o.id === temp.id) { o.selectedState = temp.selectedState } if (o.selectedState !== 'all') { stateAll = null } if (o.selectedState !== 'null') { stateNull = null } } if (stateNull) { this.selectedState = stateNull this.selected = false } else if (stateAll) { this.selectedState = stateAll this.selected = true } else { this.selectedState = stateSub this.selected = true } let data = { id: this.item.menuId, selectedState: this.selectedState, originInfo: 'parent' } this.$emit('changeToPar', data) } } }, watch: { selected () { // 初始化 if (this.originInfo === 'create') { // 不改变值 } else { // 改变值******** if (this.selected) { // 添加值 this.$store.commit('PUSH_CHECK_LIST', this.item.menuId) } else { // 删除值 this.$store.commit('SPLICE_CHECK_LIST', this.item.menuId) } } }, state () { // 子组件得到通知,如果状态一直,不去改变,如果状态不一致改变 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 () { // 初始化数组 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.$emit('changeToPar', data) } } }, created () { // 初始化,把每个组件,从最底层添加到节点列表中,这样每个子组件都在list中了,就是originInfo=create的情况下添加数组,就不用判断数组长度,直接改变状态 if (this.createSwitch) { let i = this.$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-----') } } 2cacc6d41bbb37262a98f745aa00fbf0
呼叫orgList帶有層級的json陣列
<w-tree v-for="o of orgList" :item="o" :level="0" :key="o.key"></w-tree>
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