vue元件做出無限級多選選單
- php中世界最好的语言原創
- 2018-06-08 17:22:222067瀏覽
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：
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e388a4556c0f65e1904146cc1a846bee
ed101ace28eb2e83d02513ccb1648d2b
4f555254255129eed389abd755c7120a 54bdf357c58b8a65c66d7c19c8e4d114
b7dc181cef335d3aca7c2764a59d47d472ac96585ae54b6ae11f849d2649d9e6
4333e88ff3da098980eb64a766f698c6 54bdf357c58b8a65c66d7c19c8e4d114
45a2772a6b6107b401db3c9b82c049c2
0f52e3d84a33e3edc14d95af6e1e0d9e
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7f23ea73d0b6e0b57b4268f2114cd7c4
5db79b134e9f6b82c0b36e0489ee08ed
54bdf357c58b8a65c66d7c19c8e4d114
45a2772a6b6107b401db3c9b82c049c2{{item.name}}54bdf357c58b8a65c66d7c19c8e4d114
94b3e26ee717c64999d7867364b1b4a3
b41f8f9c6e4179cbe6e1c8b508f6b506
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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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