Bootstrap

uni-app tree(树状) 组件

先看效果：

组件代码：

<template>
	<view class="next-tree">
		<view class="next-tree-mask" :class="{'show':showTree}" @tap="_cancel"></view>
		<view class="next-tree-cnt" :class="{'show':showTree}">
			<view class="next-tree-bar">
				<view class="next-tree-bar-cancel" :style="{'color':cancelColor}" hover-class="hover-c" @tap="_cancel">取消</view>
				<view class="next-tree-bar-title" :style="{'color':titleColor}">{{title}}</view>
				<view class="next-tree-bar-confirm" :style="{'color':confirmColor}" hover-class="hover-c" @tap="_confirm">确定</view>
			</view>
			<view class="next-tree-view">
				<scroll-view class="next-tree-view-sc" :scroll-y="true">
					<block v-for="(item, index) in treeList" :key="index">
						<view class="next-tree-item" :style="[{
							paddingLeft: item.rank*15 + 'px',
							zIndex: item.rank*-1 +50
						}]"
						 :class="{
							border: border === true,
							show: item.show,
							last: item.lastRank,
							showchild: item.showChild,
							open: item.open,
						}">
							<view class="next-tree-label" @tap.stop="_treeItemTap(item, index)">
								<image class="next-tree-icon" :src="item.lastRank ? lastIcon : item.showChild ? currentIcon : defaultIcon"></image>
								{{item.name}}
							</view>
							<view class="next-tree-check" @tap.stop="_treeItemSelect(item, index)" v-if="selectParent?true:item.lastRank">
								<view class="next-tree-check-yes" v-if="item.checked" :class="{'radio':!multiple}" :style="{'border-color':confirmColor, 'background-color':confirmColor}">
									<view class="next-tree-check-yes-b" :style="{'background-color':confirmColor}">
										<text class="icon-text">✔</text>
									</view>
								</view>
								<view class="next-tree-check-no" v-else :class="{'radio':!multiple}" :style="{'border-color':confirmColor}"></view>
							</view>
						</view>
					</block>
				</scroll-view>
			</view>
		</view>
	</view>
</template>

<script>
	export default {
		name: "next-tree",
		props: {
			treeData: {
				type: Array,
				default: function() {
					return []
				}
			},
			valueKey: {
				type: String,
				default: 'id'
			},
			labelKey: {
				type: String,
				default: 'label'
			},
			childrenKey: {
				type: String,
				default: 'children'
			},
			title: {
				type: String,
				default: ''
			},
			multiple: { // 是否可以多选
				type: Boolean,
				default: false
				// default: true
			},
			selectParent: { //是否可以选父级
				type: Boolean,
				default: false
			},
			foldAll: { //折叠时关闭所有已经打开的子集，再次打开时需要一级一级打开
				type: Boolean,
				default: false
			},
			confirmColor: { // 确定按钮颜色
				type: String,
				default: '#f9ae3d' // #f9ae3d
			},
			cancelColor: { // 取消按钮颜色
				type: String,
				default: '' // #757575
			},
			titleColor: { // 标题颜色
				type: String,
				default: '' // #757575
			},
			currentIcon: { // 展开时候的ic
				type: String,
				default: 'data:image/png;base64,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'
			},
			defaultIcon: { // 折叠时候的ic
				type: String,
				default: 'data:image/png;base64,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'
			},
			lastIcon: { // 没有子集的ic
				type: String,
				default: ''
			},
			border: { // 是否有分割线
				type: Boolean,
				default: false
			},
		},
		data() {
			return {
				showTree: false,
				treeList: [],
				selectIndex: -1,
				childNums: [],
				rt:[],
				rtName:[]
			}
		},
		computed: {},
		methods: {
			_show() {
				this.showTree = true
			},
			_hide() {
				this.showTree = false
			},
			_cancel() {
				this._hide()
				this.$emit("cancel", '');
			},
			_confirm() {
				this.rt=[];
				this.rtName=[];
				// 处理所选数据
				this.treeList.forEach((item, i) => {
					if(item.id==100&&item.checked){
						return this.confirmEach(this.treeData)
					}
					if (item.checked&&item.parentId&&item.parentId!="100") {
						this.rt.push(item.id)
						this.rtName.push(item.name)
					}
				})
				this._hide()
				this.$emit("confirm",  {id:this.rt,name:this.rtName});
			},
			confirmEach(list){
				list.forEach((item,index)=>{
					if(item.isDy){
						this.rtName.push(item.name)
						this.rt.push(item.id)
					}
					if(item.children&&item.children.length>0) this.confirmEach(item.children)
				})
			},
			//扁平化树结构
			_renderTreeList(list = [], rank = 0, parentId = [], parents = []) {
				list.forEach(item => {
					this.treeList.push({
						id: item[this.valueKey],
						name: item[this.labelKey],
						source: item,
						parentId, // 父级id数组
						parents, // 父级id数组
						rank, // 层级
						showChild: false, //子级是否显示
						open: false, //是否打开
						show: rank === 0, // 自身是否显示
						hideArr: [],
						orChecked: item.checked ? item.checked : false,
						checked: item.checked ? item.checked : false,
					})
					if (Array.isArray(item[this.childrenKey]) && item[this.childrenKey].length > 0) {
						// console.log(item)
						let parentid = [...parentId],
							parentArr = [...parents],
							childrenid = [];
						delete parentArr.children
						parentid.push(item[this.valueKey]);
						parentArr.push({
							[this.valueKey]: item[this.valueKey],
							[this.labelKey]: item[this.labelKey]
						})
						this._renderTreeList(item[this.childrenKey], rank + 1, parentid, parentArr);
					} else {
						this.treeList[this.treeList.length - 1].lastRank = true;
					}
				})
			},
			// 处理默认选择
			_defaultSelect() {
				this.treeList.forEach((v, i) => {
					if (v.checked) {
						this.treeList.forEach((v2, i2) => {
							if (v.parentId.toString().indexOf(v2.parentId.toString()) >= 0) {
								v2.show = true
								if (v.parentId.includes(v2.id)) {
									v2.showChild = true;
									v2.open = true;
								}
							}
						})
					}
				})
			},
			// 点击
			_treeItemTap(item, index) {
				if (item.lastRank === true) {
					//点击最后一级时触发事件
					this.treeList[index].checked = !this.treeList[index].checked
					this._fixMultiple(index)
					return;
				}
				let list = this.treeList;
				let id = item.id;
				item.showChild = !item.showChild;
				item.open = item.showChild ? true : !item.open;
				list.forEach((childItem, i) => {
					if (item.showChild === false) {
						//隐藏所有子级
						if (!childItem.parentId.includes(id)) {
							return;
						}
						if (!this.foldAll) {
							if (childItem.lastRank !== true && !childItem.open) {
								childItem.showChild = false;
							}
							// 为隐藏的内容添加一个标记
							if (childItem.show) {
								childItem.hideArr[item.rank] = id
							}
						} else {
							if (childItem.lastRank !== true) {
								childItem.showChild = false;
							}
						}
						childItem.show = false;
					} else {
						// 打开子集
						if (childItem.parentId[childItem.parentId.length - 1] === id) {
							childItem.show = true;
						}
						// 打开被隐藏的子集
						if (childItem.parentId.includes(id) && !this.foldAll) {
							// console.log(childItem.hideArr)
							if (childItem.hideArr[item.rank] === id) {
								childItem.show = true;
								if (childItem.open && childItem.showChild) {
									childItem.showChild = true
								} else {
									childItem.showChild = false
								}
								childItem.hideArr[item.rank] = null
							}
						}
					}
				})
			},
			_treeItemSelect(item, index) {
				this.treeList[index].checked = !this.treeList[index].checked
				// 选父级, 子级自动全选
				this.syncChecked(this.treeList, item.id, this.treeList[index].checked)
				if(item.rank > 0) {
					item.parentId.forEach((pid, indexP) => {
						const parent = this.treeList.filter(i => i.id === pid)
						const childNum = parent.length > 0 ? parent[0].childNum : 0
						if(this.childNums[pid] === undefined) {
							this.childNums[pid] = 1
						} else if(this.childNums[pid] < childNum) {
							this.childNums[pid]++
						}
					})
					//子级选择/选满/取消选择, 父级往上同步状态
					this.setAncestors(item.parentId, this.treeList[index].checked)
				}
				this._fixMultiple(index)
			},
			syncChecked (trees, pid, checked) {
				trees.forEach((item,index) => {
					if(item.parentId.includes(pid)) {
						this.treeList[index].checked = checked
						this.syncChecked(trees, item.id, checked)
					} else if(item.children !== undefined) {
						this.syncChecked(item.children, pid, checked)
					}
				})
			},
			setAncestors (pids, checked) {
				this.treeList.forEach((item,index) => {
					if(pids.includes(item.id)) {
						if(checked && this.childNums[item.id] !== undefined && item.childNum === this.childNums[item.id]) {
						// 子级全部选中, 父级才选中
							this.treeList[index].checked = true
						} else {
							this.treeList[index].checked = false
						}
						this.setAncestors(item.parentId, checked)
					} 
				})
			},
			// _treeItemSelect(item, index) {
			// 	this.treeList[index].checked = !this.treeList[index].checked
			// 	this._fixMultiple(index)
			// },
			// 处理单选多选
			_fixMultiple(index) {
				if (!this.multiple) {
					// 如果是单选
					this.treeList.forEach((v, i) => {
						if (i != index) {
							this.treeList[i].checked = false
						} else {
							this.treeList[i].checked = true
						}
					})
				}
			},
			// 重置数据
			_reTreeList() {
				this.treeList.forEach((v, i) => {
					this.treeList[i].checked = v.orChecked
				})
			},
			_initTree(treeData = this.treeData){
				this.treeList = [];
				this._renderTreeList(treeData);
				this.$nextTick(() => {
					this._defaultSelect(treeData)
				})
			}
		},
		mounted() {
			console.log('----------next-tree组件完成挂载demo------------')
			this._initTree();
			this.$watch(() => this.treeData, (list) => {
				this._initTree(list);
			}, {deep: true, immediate: true})
			this.$watch(() => [this.multiple, this.selectParent], () => {
				if (this.treeData.length) {
					this._reTreeList();
				}	
			}, {deep: true, immediate: true})
		}
	}
</script>

<style scoped>
	@import "./style.css";
</style>


.next-tree-mask {
  position: fixed;
  top: 0rpx;
  right: 0rpx;
  bottom: 0rpx;
  left: 0rpx;
  z-index: 9998;
  background-color: rgba(0, 0, 0, 0.6);
  opacity: 0;
  transition: all 0.3s ease;
  visibility: hidden;
}
.next-tree-mask.show {
  visibility: visible;
  opacity: 1;
}
.next-tree-cnt {
  position: fixed;
  top: 0rpx;
  right: 0rpx;
  bottom: 0rpx;
  left: 0rpx;
  z-index: 9999;
  top: 160rpx;
  transition: all 0.3s ease;
  transform: translateY(100%);
}
.next-tree-cnt.show {
  transform: translateY(0);
}
.next-tree-bar {
  background-color: #fff;
  height: 72rpx;
  padding-left: 20rpx;
  padding-right: 20rpx;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-sizing: border-box;
  border-bottom-width: 1rpx !important;
  border-bottom-style: solid;
  border-bottom-color: #f5f5f5;
  font-size: 32rpx;
  color: #757575;
  line-height: 1;
}
.next-tree-bar-confirm {
  color: #f9ae3d;
}
.next-tree-view {
  position: absolute;
  top: 0rpx;
  right: 0rpx;
  bottom: 0rpx;
  left: 0rpx;
  top: 72rpx;
  background-color: #fff;
  padding-top: 20rpx;
  padding-right: 20rpx;
  padding-bottom: 20rpx;
  padding-left: 20rpx;
}
.next-tree-view-sc {
  height: 100%;
  overflow: hidden;
}
.next-tree-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 26rpx;
  color: #757575;
  line-height: 1;
  height: 0;
  opacity: 0;
  transition: 0.2s;
  position: relative;
  overflow: hidden;
}
.next-tree-item.show {
  height: 80rpx;
  opacity: 1;
}
.next-tree-item.showchild:before {
  transform: rotate(90deg);
}
.next-tree-item.border {
  border-bottom: 1rpx solid rgba(204,204,204,0.2);
}
.next-tree-item.last:before {
  opacity: 0;
}
.next-tree-icon {
  width: 26rpx;
  height: 26rpx;
  margin-right: 8rpx;
}
.next-tree-label {
  flex: 1;
  display: flex;
  align-items: center;
  height: 100%;
  line-height: 1.2;
}
.next-tree-check {
  width: 40px;
  height: 40px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.next-tree-check-yes,
.next-tree-check-no {
  width: 20px;
  height: 20px;
  border-top-left-radius: 20%;
  border-top-right-radius: 20%;
  border-bottom-right-radius: 20%;
  border-bottom-left-radius: 20%;
  border-top-width: 1rpx;
  border-left-width: 1rpx;
  border-bottom-width: 1rpx;
  border-right-width: 1rpx;
  border-style: solid;
  border-color: #f9ae3d;
  display: flex;
  justify-content: center;
  align-items: center;
  box-sizing: border-box;
}
.next-tree-check-yes-b {
  border-top-left-radius: 20%;
  border-top-right-radius: 20%;
  border-bottom-right-radius: 20%;
  border-bottom-left-radius: 20%;
  background-color: #f9ae3d;
	color: #fff;
}
.next-tree-check-yes-b .icon-text {
	font-size: 14px;
	font-weight: normal;
	font-family: uicon-iconfont;
	display: flex;
	flex-direction: row;
	align-items: center;
}
.next-tree-check .radio {
  border-top-left-radius: 50%;
  border-top-right-radius: 50%;
  border-bottom-right-radius: 50%;
  border-bottom-left-radius: 50%;
}
.next-tree-check .radio .next-tree-check-yes-b {
  border-top-left-radius: 50%;
  border-top-right-radius: 50%;
  border-bottom-right-radius: 50%;
  border-bottom-left-radius: 50%;
}
.hover-c {
  opacity: 0.6;
}

 参数配置：

dataListArray[]数据源
idKeyStringid显示的主键key值
nameKeyStringname显示的名字key值
phoneKeyStringphone显示的电话key值
imgKeyStringimg显示的头像key值
radiusNumber4rpx头像圆角(rpx、px、%)
showAvatarBooleantrue是否显示头像
isInterlockBooleanfalse是否双向联动
事件名说明类型回调参数
itemclick菜单项item点击事件emitObject

 页面使用：

<next-tree ref="qiantree" :selectParent="true" labelKey="name" valueKey="id" 
	:multiple="true" :treeData="rangeList" 
	@confirm="onconfirm" />


import nextTree from '../components/next-tree/next-tree.vue'
components: {
	nextTree
},
	

<next-tree ref="qiantree" :selectParent="true" labelKey="name" valueKey="id" 
	:multiple="true" :treeData="rangeList" 
   @confirm="onconfirm" />



onconfirm(list) {
	console.log('选中项的数量列表list：', list)	
},

数据格式 

悦读

道可道，非常道；名可名，非常名。 无名，天地之始，有名，万物之母。 故常无欲，以观其妙，常有欲，以观其徼。 此两者，同出而异名，同谓之玄，玄之又玄，众妙之门。

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