uniapp 改写uni-data-picker级联选择器（带搜索和多选）新增列出选择和删除功能

效果演示

注意：视频中的数据是模拟数据，请自行定义数据才可使用，数据格式末尾有例子

uni-data-picker.vue更改

<template>
	<view class="uni-data-tree">
		<view class="uni-data-tree-input" @click="handleInput">
			<slot :options="options" :data="inputSelected" :error="errorMessage">
				<view class="input-value" :class="{'input-value-border': border}">
					<text v-if="errorMessage" class="selected-area error-text">{{errorMessage}}</text>
					<view v-else-if="loading && !isOpened" class="selected-area">
						<uni-load-more class="load-more" :contentText="loadMore" status="loading"></uni-load-more>
					</view>
					<scroll-view v-else-if="inputSelected.length" class="selected-area" scroll-x="true">
						<view class="selected-list">
							<view class="selected-item" v-for="(item,index) in inputSelected" :key="index">
								<text>{{item.text}}</text><text v-if="index<inputSelected.length-1"
									class="input-split-line">{{split}}</text>
							</view>
						</view>
					</scroll-view>
					<text v-else class="selected-area placeholder">{{placeholder}}</text>
					<view v-if="clearIcon && !readonly && inputSelected.length" class="icon-clear"
						@click.stop="clear">
						<uni-icons type="clear" color="#e1e1e1" size="14"></uni-icons>
					</view>
					<view class="arrow-area" v-if="(!clearIcon || !inputSelected.length) && !readonly ">
						<view class="input-arrow"></view>
					</view>
				</view>
			</slot>
		</view>
		<view class="uni-data-tree-cover" v-if="isOpened" @click="handleClose"></view>
		<view class="uni-data-tree-dialog" v-if="isOpened">
			<view class="uni-popper__arrow"></view>
			<view class="dialog-caption">
				<view class="title-area">
					<text class="dialog-title">{{popupTitle}}</text>
				</view>
				<view class="dialog-close" @click="handleClose">
					<view class="dialog-close-plus" data-id="close"></view>
					<view class="dialog-close-plus dialog-close-rotate" data-id="close"></view>
				</view>
			</view>
			<data-picker-view class="picker-view" ref="pickerView" v-model="dataValue" :localdata="localdata"
				:preload="preload" :collection="collection" :field="field" :orderby="orderby" :where="where"
				:step-searh="stepSearh" :self-field="selfField" :parent-field="parentField" :managed-mode="true"
				:map="map" :showSearch="showSearch" :ellipsis="ellipsis" @change="onchange" @datachange="ondatachange" @nodeclick="onnodeclick">
			</data-picker-view>
		</view>
	</view>
</template>

<script>
	import dataPicker from "../uni-data-pickerview/uni-data-picker.js"
	import DataPickerView from "../uni-data-pickerview/uni-data-pickerview.vue"

	/**
	 * DataPicker 级联选择
	 * @description 支持单列、和多列级联选择。列数没有限制，如果屏幕显示不全，顶部tab区域会左右滚动。
	 * @tutorial https://ext.dcloud.net.cn/plugin?id=3796
	 * @property {String} popup-title 弹出窗口标题
	 * @property {Array} localdata 本地数据，参考
	 * @property {Boolean} border = [true|false] 是否有边框
	 * @property {Boolean} readonly = [true|false] 是否仅读
	 * @property {Boolean} preload = [true|false] 是否预加载数据
	 * @value true 开启预加载数据，点击弹出窗口后显示已加载数据
	 * @value false 关闭预加载数据，点击弹出窗口后开始加载数据
	 * @property {Boolean} step-searh = [true|false] 是否分布查询
	 * @value true 启用分布查询，仅查询当前选中节点
	 * @value false 关闭分布查询，一次查询出所有数据
	 * @property {String|DBFieldString} self-field 分布查询当前字段名称
	 * @property {String|DBFieldString} parent-field 分布查询父字段名称
	 * @property {String|DBCollectionString} collection 表名
	 * @property {String|DBFieldString} field 查询字段，多个字段用 `,` 分割
	 * @property {String} orderby 排序字段及正序倒叙设置
	 * @property {String|JQLString} where 查询条件
	 * @event {Function} popupshow 弹出的选择窗口打开时触发此事件
	 * @event {Function} popuphide 弹出的选择窗口关闭时触发此事件
	 */
	export default {
		name: 'UniDataPicker',
		emits: ['popupopened', 'popupclosed', 'nodeclick', 'input', 'change', 'update:modelValue'],
		mixins: [dataPicker],
		components: {
			DataPickerView
		},
		props: {
			options: {
				type: [Object, Array],
				default () {
					return {}
				}
			},
			popupTitle: {
				type: String,
				default: '请选择'
			},
			placeholder: {
				type: String,
				default: '请选择'
			},
			heightMobile: {
				type: String,
				default: ''
			},
			readonly: {
				type: Boolean,
				default: false
			},
			clearIcon: {
				type: Boolean,
				default: true
			},
			border: {
				type: Boolean,
				default: true
			},
			split: {
				type: String,
				default: '/'
			},
			ellipsis: {
				type: Boolean,
				default: true
			},
			showSearch: {
				type: Boolean,
				default: false
			},
		},
		data() {
			return {
				isOpened: false,
				inputSelected: []
			}
		},
		created() {
			this.form = this.getForm('uniForms')
			this.formItem = this.getForm('uniFormsItem')
			if (this.formItem) {
				if (this.formItem.name) {
					this.rename = this.formItem.name
					this.form.inputChildrens.push(this)
				}
			}

			this.$nextTick(() => {
				this.load()
			})
		},
		methods: {
			clear() {
				this.inputSelected.splice(0)
				this._dispatchEvent([])
			},
			onPropsChange() {
				this._treeData = []
				this.selectedIndex = 0
				this.load()
			},
			load() {
				if (this.readonly) {
					this._processReadonly(this.localdata, this.dataValue)
					return
				}

				if (this.isLocaldata) {
					this.loadData()
					this.inputSelected = this.selected.slice(0)
				} else if (!this.parentField && !this.selfField && this.hasValue) {
					this.getNodeData(() => {
						this.inputSelected = this.selected.slice(0)
					})
				} else if (this.hasValue) {
					this.getTreePath(() => {
						this.inputSelected = this.selected.slice(0)
					})
				}
			},
			getForm(name = 'uniForms') {
				let parent = this.$parent;
				let parentName = parent.$options.name;
				while (parentName !== name) {
					parent = parent.$parent;
					if (!parent) return false;
					parentName = parent.$options.name;
				}
				return parent;
			},
			show() {
				this.isOpened = true
				this.$nextTick(() => {
					this.$refs.pickerView.updateData({
						treeData: this._treeData,
						selected: this.selected,
						selectedIndex: this.selectedIndex
					})
				})
				this.$emit('popupopened')
			},
			hide() {
				this.isOpened = false
				this.$emit('popupclosed')
			},
			handleInput() {
				if (this.readonly) {
					return
				}
				this.show()
			},
			handleClose(e) {
				this.hide()
			},
			onnodeclick(e) {
				this.$emit('nodeclick', e)
			},
			ondatachange(e) {
				this._treeData = this.$refs.pickerView._treeData
			},
			onchange(e) {
				this.hide()
				this.inputSelected = e
				this._dispatchEvent(e)
			},
			_processReadonly(dataList, value) {
				var isTree = dataList.findIndex((item) => {
					return item.children
				})
				if (isTree > -1) {
					let inputValue
					if (Array.isArray(value)) {
						inputValue = value[value.length - 1]
						if (typeof inputValue === 'object' && inputValue.value) {
							inputValue = inputValue.value
						}
					} else {
						inputValue = value
					}
					this.inputSelected = this._findNodePath(inputValue, this.localdata)
					return
				}

				if (!this.hasValue) {
					this.inputSelected = []
					return
				}

				let result = []
				for (let i = 0; i < value.length; i++) {
					var val = value[i]
					var item = dataList.find((v) => {
						return v.value == val
					})
					if (item) {
						result.push(item)
					}
				}
				if (result.length) {
					this.inputSelected = result
				}
			},
			_filterForArray(data, valueArray) {
				var result = []
				for (let i = 0; i < valueArray.length; i++) {
					var value = valueArray[i]
					var found = data.find((item) => {
						return item.value == value
					})
					if (found) {
						result.push(found)
					}
				}
				return result
			},
			_dispatchEvent(selected) {
				let item = {}
				if (selected.length) {
					var value = new Array(selected.length)
					for (var i = 0; i < selected.length; i++) {
						value[i] = selected[i].value
					}
					item = selected[selected.length - 1]
				} else {
					item.value = ''
				}
				if (this.formItem) {
					this.formItem.setValue(item.value)
				}

				this.$emit('input', item.value)
				this.$emit('update:modelValue', item.value)
				this.$emit('change', {
					detail: {
						value: selected
					}
				})
			}
		}
	}
</script>

<style >
	.uni-data-tree {
		position: relative;
		font-size: 14px;
		min-width:150px;
		max-width:220px;
	}

	.error-text {
		color: #DD524D;
	}

	.input-value {
		/* #ifndef APP-NVUE */
		display: flex;
		/* #endif */
		flex-direction: row;
		align-items: center;
		flex-wrap: nowrap;
		font-size: 14px;
		line-height: 38px;
		padding: 0 5px;
		overflow: hidden;
		/* #ifdef APP-NVUE */
		height: 40px;
		/* #endif */
	}

	.input-value-border {
		border: 1px solid #e5e5e5;
		border-radius: 5px;
	}

	.selected-area {
		flex: 1;
		overflow: hidden;
		/* #ifndef APP-NVUE */
		display: flex;
		/* #endif */
		flex-direction: row;
	}

	.load-more {
		/* #ifndef APP-NVUE */
		margin-right: auto;
		/* #endif */
		/* #ifdef APP-NVUE */
		width: 40px;
		/* #endif */
	}

	.selected-list {
		/* #ifndef APP-NVUE */
		display: flex;
		/* #endif */
		flex-direction: row;
		flex-wrap: nowrap;
		padding: 0 5px;
	}

	.selected-item {
		flex-direction: row;
		padding: 0 1px;
		/* #ifndef APP-NVUE */
		white-space: nowrap;
		/* #endif */
	}

	.placeholder {
		color: grey;
	}

	.input-split-line {
		opacity: .5;
	}

	.arrow-area {
		position: relative;
		width: 20px;
		/* #ifndef APP-NVUE */
		margin-bottom: 5px;
		margin-left: auto;
		display: flex;
		/* #endif */
		justify-content: center;
		transform: rotate(-45deg);
		transform-origin: center;
	}

	.input-arrow {
		width: 7px;
		height: 7px;
		border-left: 1px solid #999;
		border-bottom: 1px solid #999;
	}

	.uni-data-tree-cover {
		position: fixed;
		left: 0;
		top: 0;
		right: 0;
		bottom: 0;
		background-color: rgba(0, 0, 0, .4);
		/* #ifndef APP-NVUE */
		display: flex;
		/* #endif */
		flex-direction: column;
		z-index: 100;
	}

	.uni-data-tree-dialog {
		position: fixed;
		left: 0;
		top: 20%;
		right: 0;
		bottom: 0;
		background-color: #FFFFFF;
		border-top-left-radius: 10px;
		border-top-right-radius: 10px;
		/* #ifndef APP-NVUE */
		display: flex;
		/* #endif */
		flex-direction: column;
		z-index: 102;
		overflow: hidden;
		/* #ifdef APP-NVUE */
		width: 750rpx;
		/* #endif */
	}

	.dialog-caption {
		position: relative;
		/* #ifndef APP-NVUE */
		display: flex;
		/* #endif */
		flex-direction: row;
		/* border-bottom: 1px solid #f0f0f0; */
	}

	.title-area {
		/* #ifndef APP-NVUE */
		display: flex;
		/* #endif */
		align-items: center;
		/* #ifndef APP-NVUE */
		margin: auto;
		/* #endif */
		padding: 0 10px;
	}

	.dialog-title {
		/* font-weight: bold; */
		line-height: 44px;
	}

	.dialog-close {
		position: absolute;
		top: 0;
		right: 0;
		bottom: 0;
		/* #ifndef APP-NVUE */
		display: flex;
		/* #endif */
		flex-direction: row;
		align-items: center;
		padding: 0 15px;
	}

	.dialog-close-plus {
		width: 16px;
		height: 2px;
		background-color: #666;
		border-radius: 2px;
		transform: rotate(45deg);
	}

	.dialog-close-rotate {
		position: absolute;
		transform: rotate(-45deg);
	}

	.picker-view {
		flex: 1;
		overflow: hidden;
	}

	/* #ifdef H5 */
	@media all and (min-width: 768px) {
		.uni-data-tree-cover {
			background-color: transparent;
		}

		.uni-data-tree-dialog {
			position: absolute;
			top: 55px;
			height: auto;
			min-height: 400px;
			max-height: 50vh;
			background-color: #fff;
			border: 1px solid #EBEEF5;
			box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
			border-radius: 4px;
			overflow: unset;
		}

		.dialog-caption {
			display: none;
		}

		.icon-clear {
			margin-right: 5px;
		}
	}

	/* #endif */

	/* picker 弹出层通用的指示小三角, todo：扩展至上下左右方向定位 */
	/* #ifndef APP-NVUE */
	.uni-popper__arrow,
	.uni-popper__arrow::after {
		position: absolute;
		display: block;
		width: 0;
		height: 0;
		border-color: transparent;
		border-style: solid;
		border-width: 6px;
	}

	.uni-popper__arrow {
		filter: drop-shadow(0 2px 12px rgba(0, 0, 0, 0.03));
		top: -6px;
		left: 10%;
		margin-right: 3px;
		border-top-width: 0;
		border-bottom-color: #EBEEF5;
	}

	.uni-popper__arrow::after {
		content: " ";
		top: 1px;
		margin-left: -6px;
		border-top-width: 0;
		border-bottom-color: #fff;
	}
	/* #endif */
	</style>

uni-data-pickerview.vue更改

<template>
	<view class="uni-data-pickerview">
		<uni-combox v-if="showSearch" :candidates="candidates" placeholder="输入搜索内容"  @input="handleInput"></uni-combox>
		<!-- <input placeholder="请输入搜索内容" style="border:1px solid #ddd;width:80%;margin:0 auto;border-radius:5px;padding:5px;" @input="handleInput"/> -->
		<scroll-view class="selected-area" scroll-x="true" scroll-y="false" :show-scrollbar="false">
			<view class="selected-list">
				<template v-for="(item,index) in selected">
					<view class="selected-item"
						:class="{'selected-item-active':index==selectedIndex, 'selected-item-text-overflow': ellipsis}"
						:key="index" v-if="item.text" @click="handleSelect(index)">
						<text class="">{{item.text}}</text>
					</view>
				</template>
			</view>
		</scroll-view>
		<view class="tab-c">
			<template v-for="(child, i) in dataList">
				<scroll-view class="list" :key="i" v-if="i==selectedIndex" :scroll-y="true">
					<view class="item" :class="{'is-disabled': !!item.disable}" v-for="(item, j) in child" :key="j"
						>
						<checkbox  @click ="handleClick(item)"  v-if="showSearch && i==0" :checked=" selected.length > j && item[map.value] == selected[j].value"/>
						<text @click="handleNodeClick(item, i, j)" class="item-text item-text-overflow">{{item[map.text]}}</text>
						<view class="check" v-if="i == 1 && selected.length > i && item[map.value] == selected[i].value"></view>
					</view>
				</scroll-view>
			</template>

			<view class="loading-cover" v-if="loading">
				<uni-load-more class="load-more" :contentText="loadMore" status="loading"></uni-load-more>
			</view>
			<view class="error-message" v-if="errorMessage">
				<text class="error-text">{{errorMessage}}</text>
			</view>
		</view>
	</view>
</template>

<script>
	import dataPicker from "./uni-data-picker.js"

	/**
	 * DataPickerview
	 * @description uni-data-pickerview
	 * @tutorial https://ext.dcloud.net.cn/plugin?id=3796
	 * @property {Array} localdata 本地数据，参考
	 * @property {Boolean} step-searh = [true|false] 是否分布查询
	 * @value true 启用分布查询，仅查询当前选中节点
	 * @value false 关闭分布查询，一次查询出所有数据
	 * @property {String|DBFieldString} self-field 分布查询当前字段名称
	 * @property {String|DBFieldString} parent-field 分布查询父字段名称
	 * @property {String|DBCollectionString} collection 表名
	 * @property {String|DBFieldString} field 查询字段，多个字段用 `,` 分割
	 * @property {String} orderby 排序字段及正序倒叙设置
	 * @property {String|JQLString} where 查询条件
	 */
	export default {
		name: 'UniDataPickerView',
		emits: ['nodeclick', 'change', 'datachange', 'update:modelValue'],
		mixins: [dataPicker],
		props: {
			managedMode: {
				type: Boolean,
				default: false
			},
			ellipsis: {
				type: Boolean,
				default: true
			},
			showSearch: {
				type: Boolean,
				default: false
			},
		},
		data() {
			return {
				candidates:[],
				nodeList:[],
			}
		},
		created() {
			if (this.managedMode) {
				return
			}
			this.$nextTick(() => {
				this.load()
			})
		},
		methods: {
			//搜索框选择员工
			handleInput(e){
				if(this.candidates.indexOf(e) != -1){
					let index = this.candidates.indexOf(e);
					let node = this.nodeList[index];
					console.log(this.candidates.indexOf(e));
					console.log(node);
					this._dispatchEvent()
					this.$emit('nodeclick', node)
				}
				//console.log(this.loadData());
			},
			//点击选择组别
			handleClick(item){
				let text = item.text;
				for(let i in this.nodeList){
					if(this.nodeList[i].parent_value == text){
						this.$emit('nodeclick', this.nodeList[i])
					}
				}
				this._dispatchEvent()
			},
			onPropsChange() {
				this._treeData = []
				this.selectedIndex = 0
				this.load()
			},
			load() {
				if (this.isLocaldata) {
					this.loadData()
				} else if (this.dataValue.length) {
					this.getTreePath((res) => {
						this.loadData()
					})
				}
			},
			handleSelect(index) {
				this.selectedIndex = index
			},
			handleNodeClick(item, i, j) {
				
				if (item.disable) {
					return
				}
				const node = this.dataList[i][j]
				const text = node[this.map.text]
				const value = node[this.map.value]
				if (i < this.selected.length - 1) {
					this.selected.splice(i, this.selected.length - i)
					this.selected.push({
						text,
						value
					})
					console.log(this.selected);
				} else if (i === this.selected.length - 1) {
					this.selected.splice(i, 1, {
						text,
						value
					})
					console.log(this.selected);
				}

				if (node.isleaf) {
					this.onSelectedChange(node, node.isleaf)
					return
				}
				const {
					isleaf,
					hasNodes
				} = this._updateBindData()

				if (!this._isTreeView() && !hasNodes) {
					this.onSelectedChange(node, true)
					return
				}

				if (this.isLocaldata && (!hasNodes || isleaf)) {
					this.onSelectedChange(node, true)
					return
				}

				if (!isleaf && !hasNodes) {
					this._loadNodeData((data) => {
						if (!data.length) {
							node.isleaf = true
						} else {
							this._treeData.push(...data)
							this._updateBindData(node)
						}
						this.onSelectedChange(node, node.isleaf)
					}, this._nodeWhere())
					return
				}

				this.onSelectedChange(node, false)
			},
			updateData(data) {
				//新增筛选用户功能ld
				let curTreeData=data.treeData;
				this.candidates = [];
				this.nodeList =[];
				for(let i in curTreeData){
					if(curTreeData[i].parent_value){
						this.candidates.push(curTreeData[i].text);
						this.nodeList.push(curTreeData[i])
					}
				}
				this._treeData = data.treeData
				this.selected = data.selected
				if (!this._treeData.length) {
					this.loadData()
				} else {
					//this.selected = data.selected
					this._updateBindData()
				}
			},
			onDataChange() {
				this.$emit('datachange')
			},
			onSelectedChange(node, isleaf) {
				if (isleaf) {
					this._dispatchEvent()
				}

				if (node) {
					this.$emit('nodeclick', node)
				}
			},
			_dispatchEvent() {
				this.$emit('change', this.selected.slice(0))
			}
		}
	}
</script>
<style >
	.uni-data-pickerview {
		flex: 1;
		/* #ifndef APP-NVUE */
		display: flex;
		/* #endif */
		flex-direction: column;
		overflow: hidden;
		height: 100%;
	}

	.error-text {
		color: #DD524D;
	}

	.loading-cover {
		position: absolute;
		left: 0;
		top: 0;
		right: 0;
		bottom: 0;
		background-color: rgba(255, 255, 255, .5);
		/* #ifndef APP-NVUE */
		display: flex;
		/* #endif */
		flex-direction: column;
		align-items: center;
		z-index: 1001;
	}

	.load-more {
		/* #ifndef APP-NVUE */
		margin: auto;
		/* #endif */
	}

	.error-message {
		background-color: #fff;
		position: absolute;
		left: 0;
		top: 0;
		right: 0;
		bottom: 0;
		padding: 15px;
		opacity: .9;
		z-index: 102;
	}

	/* #ifdef APP-NVUE */
	.selected-area {
		width: 750rpx;
	}

	/* #endif */

	.selected-list {
		/* #ifndef APP-NVUE */
		display: flex;
		/* #endif */
		flex-direction: row;
		flex-wrap: nowrap;
		padding: 0 5px;
		border-bottom: 1px solid #f8f8f8;
	}

	.selected-item {
		margin-left: 10px;
		margin-right: 10px;
		padding: 12px 0;
		text-align: center;
		/* #ifndef APP-NVUE */
		white-space: nowrap;
		/* #endif */
	}

	.selected-item-text-overflow {
		width: 168px;
		/* fix nvue */
		overflow: hidden;
		/* #ifndef APP-NVUE */
		width: 6em;
		white-space: nowrap;
		text-overflow: ellipsis;
		-o-text-overflow: ellipsis;
		/* #endif */
	}

	.selected-item-active {
		border-bottom: 2px solid #007aff;
	}

	.selected-item-text {
		color: #007aff;
	}

	.tab-c {
		position: relative;
		flex: 1;
		/* #ifndef APP-NVUE */
		display: flex;
		/* #endif */
		flex-direction: row;
		overflow: hidden;
	}

	.list {
		flex: 1;
	}

	.item {
		padding: 12px 15px;
		/* border-bottom: 1px solid #f0f0f0; */
		/* #ifndef APP-NVUE */
		display: flex;
		/* #endif */
		flex-direction: row;
		justify-content: space-between;
	}

	.is-disabled {
		opacity: .5;
	}

	.item-text {
		/* flex: 1; */
		color: #333333;
	}

	.item-text-overflow {
		width: 280px;
		/* fix nvue */
		overflow: hidden;
		/* #ifndef APP-NVUE */
		width: 20em;
		white-space: nowrap;
		text-overflow: ellipsis;
		-o-text-overflow: ellipsis;
		/* #endif */
	}

	.check {
		margin-right: 5px;
		border: 2px solid #007aff;
		border-left: 0;
		border-top: 0;
		height: 12px;
		width: 6px;
		transform-origin: center;
		/* #ifndef APP-NVUE */
		transition: all 0.3s;
		/* #endif */
		transform: rotate(45deg);
	}
</style>

调用页面

showSearch 是否显示搜索框和多选操作 =》 true/false

<template>
	<view>
			<view>{{treePickTitle}}</view>
			<uni-section :title="treePickTitle" type="line" padding >
				<uni-data-picker  :showSearch= "showSearch" :popup-title="treePickTitleSelect" :localdata="dataTree" v-model="activeDataTree"
					@change="onchange" @nodeclick="onnodeclick">
				</uni-data-picker>
			</uni-section>
	</view>
</template>

dataTree 格式例子

activeDataTree:"1-1",
  dataTree: [{
          text: "一年级",
          value: "1-0",
          children: [
            {
              text: "1.1班",
              value: "1-1"
            },
            {
              text: "1.2班",
              value: "1-2"
            }
          ]
        },
        {
          text: "二年级",
          value: "2-0"
        },
        {
          text: "三年级",
          value: "3-0"
        }]

bw:不想用text 和value 属性也可以修改

2022/08/19修改
由于很多小伙伴私信我说遇到问题，所以了解到大家可能需要的是不仅仅是搜索和多选的功能，也需要对应下面的标签新增，和删减功能，是我这边上传的视频造成误解啦，今天花费空余时间给大家写了个例子。复制粘贴可用：
步骤：

1，找到项目下的这两个文件 把内容替换成我文章中的内容

2，调用页面全部代码

<template>
	<view class="container">
		<uni-card is-full :is-shadow="false">
			<text class="uni-h6">标签组件多用于商品分类、重点内容显示等场景。</text>
		</uni-card>
		<uni-section title="本地数据" type="line" padding style="height: calc(100vh - 100px);">
			<uni-data-picker :showSearch= "showSearch"  placeholder="请选择班级" popup-title="请选择所在地区" :localdata="dataTree" v-model="classes"
				@change="onchange" @nodeclick="onnodeclick" @popupopened="onpopupopened" @popupclosed="onpopupclosed">
			</uni-data-picker>
			<view class="userSelectBox example-body">
				   <view class="tag-view" v-for="(value,key) in userListSelect"  :key="key" @click="clearTagAdmin(value)">
						<uni-tag :text="userList[value]" type="primary" ></uni-tag>
						<uni-icons class="clearBtn"  type="clear" size="15" color="#ccc" />
					</view>
			</view>
		</uni-section>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				showSearch:true,
				userListSelect:[1,3],
				userList:['1.1班','1.2班','2.1班','2.2班'],
				classes: '1-2',
				dataTree: [{
						text: "一年级",
						value: "1-0",
						children: [{
								text: "1.1班",
								value: "1-1",
								parent_value:"1",
								id:0,
							},
							{
								text: "1.2班",
								value: "1-2",
								parent_value:"1",
								id:1,
							}
						]
					},
					{
						text: "二年级",
						value: "2-0",
						children: [{
								text: "2.1班",
								value: "2-1",
								parent_value:"2",
								id:2,
								
							},
							{
								text: "2.2班",
								value: "2-2",
								parent_value:"2",
								id:3
							}
						]
					},
					
				]
			}
		},
		methods: {
			clearTagAdmin(value){
				this.userListSelect = this.userListSelect.filter(item => item != value); 
			},
			onnodeclick(data) {
				console.log(data);
				if(data.parent_value){//存在父级
				  let dataId = data.id;
				  this.userListSelect.push(dataId);
				  this.userListSelect = [...new Set(this.userListSelect)]//es6数组去重
				}
			},
			onpopupopened(e) {
				console.log('popupopened');
			},
			onpopupclosed(e) {
				console.log('popupclosed');
			},
			onchange(e) {
				console.log('---------onchange:', e);
			}
		}
	}
</script>

<style>
	.title {
		font-size: 14px;
		font-weight: bold;
		margin: 20px 0 5px 0;
	}

	.data-pickerview {
		height: 400px;
		border: 1px #e5e5e5 solid;
	}

	.popper__arrow {
		top: -6px;
		left: 50%;
		margin-right: 3px;
		border-top-width: 0;
		border-bottom-color: #EBEEF5;
	}

	.popper__arrow {
		top: -6px;
		left: 50%;
		margin-right: 3px;
		border-top-width: 0;
		border-bottom-color: #EBEEF5;
	}
	.userSelectBox{
		border: 1px solid #ddd;
		width: 98%;
		min-height: 60px;
		padding: 5px 1%;
		border-radius:5px;
		overflow: hidden;
	}
	
	.tag-view{
		display: inline-block;
		float: left;
		margin-right:10px;
		margin-bottom:10px;
		height:24px;
		min-width:24px;
		max-width:50px;
		position:relative;
	}
	.clearBtn{
		position:absolute;
		right:-3px;
		top:-8px;
	}
	.example {
		padding: 15px;
		background-color: #fff;
	}
	
	.segmented-control {
		margin-bottom: 15px;
	}
	
	.button-group {
		margin-top: 15px;
		display: flex;
		justify-content: space-around;
	}
	
	.form-item {
		display: flex;
		align-items: center;
	}
	
	.button {
		display: flex;
		align-items: center;
		height: 35px;
		margin-left: 10px;
	}
	.selectBox {
		border: 1px solid #ddd;
		padding: 10px 1%;
		height: 14px;
		width: 98%;
		border-radius: 5px;
	}
</style>

3，可根据自己需求进行更改：呈现效果如下：

希望多多支持哈，点个赞再走 嘻嘻~码字不易。谢谢大家，有问题可私信