uni-app 微信小程序 picker 三級聯動

以前作過一個picker的三級聯動功能，這裏分享代碼給你們

具體代碼：

// An highlighted block
<template>
	<view>
		<picker mode="multiSelector" @change="bindMultiPickerChange" @columnchange="bindMultiPickerColumnChange" :value="multiIndex" :range="multiArray">
			<view class="picker" style="display: flex;justify-content:space-around;align-items:center;width: 100%;flex: 1">
				<view class="energy">
					{{ areaname }}
					<uni-icons :size="40" class="uni-icon-wrapper" color="#e0e0e0" type="arrowdown" />
				</view>
				<view style="background-color: #50a0d1;height: 50rpx;width: 1px;opacity: 0.5"></view>
				<view class="energy">
					{{ buildingname }}
					<uni-icons :size="40" class="uni-icon-wrapper" color="#e0e0e0" type="arrowdown" />
				</view>
				<view style="background-color: #50a0d1;height: 50rpx;width: 1px;opacity: 0.5"></view>
				<view class="energy">
					{{ floorname }}
					<uni-icons :size="40" class="uni-icon-wrapper" color="#e0e0e0" type="arrowdown" />
				</view>
			</view>
		</picker>
	</view>
</template>

<script>
import Vue from 'vue';
export default {
	data() {
		return {
			multiArray: [['1', '2', '3', '4', '5', '6', '7'], ['1舍', '2舍', '3舍', '4舍'], ['111樓', '112樓', '113樓', '114樓']],
			multiIndex: [0, 0, 0],
			tabindex: 0,
			ydindex: 0,
			firstid: '0',
			secondid: '0',
			thirdid: '0',
			areaname: '1',
			dengswitchvalue: '',
			ktswitchvalue: '',
			buildingname: '1舍',
			floorname: '111樓',
			nowitem: '1-1舍-111樓',
			column1data: [
				//每一個院部的樓棟
				['11舍', '12舍', '13舍', '14舍'],
				// ['21舍', '22舍', '23舍', '24舍'],
				['21舍'],
				// ['31舍', '32舍', '33舍', '34舍'],
				['31舍', '32舍'],
				['41舍', '42舍', '43舍', '44舍'],
				['51舍', '52舍', '53舍', '54舍'],
				['61舍', '62舍', '63舍', '64舍'],
				['71舍', '72舍', '73舍', '74舍']
			],
			hangdata: [
				//每一棟包含樓層
				[['111樓', '112樓', '113樓', '114樓'], ['121樓', '122樓', '123樓'], ['131樓', '132樓', '133樓', '134樓'], ['141樓', '142樓', '143樓', '144樓']],
				// [['211樓', '212樓', '213樓', '214樓'], ['221樓', '222樓', '223樓', '224樓'], ['231樓', '232樓', '233樓', '234樓'], ['241樓', '242樓', '243樓', '244樓']],
				[['211樓', '212樓', '213樓', '214樓']],
				// [['311樓', '312樓', '313樓', '314樓'], ['321樓', '322樓', '323樓', '324樓'], ['331樓', '332樓', '333樓', '334樓'], ['341樓', '342樓', '343樓', '344樓']],
				[['311樓', '312樓', '313樓', '314樓'], ['321樓', '322樓', '323樓']],
				[['411樓', '412樓', '413樓', '414樓'], ['421樓', '422樓', '423樓', '424樓'], ['431樓', '432樓', '433樓', '434樓'], ['441樓', '442樓', '443樓', '444樓']],
				[['511樓', '512樓', '513樓', '514樓'], ['521樓', '522樓', '523樓'], ['531樓', '532樓', '533樓', '534樓'], ['541樓', '542樓', '543樓', '544樓']],
				[['611樓', '612樓', '613樓', '614樓'], ['621樓', '622樓', '623樓', '624樓'], ['631樓', '632樓', '633樓', '634樓'], ['641樓', '642樓', '643樓', '654樓']],
				[['711樓', '712樓'], ['721樓', '722樓', '723樓'], ['731樓', '732樓', '733樓', '734樓'], ['741樓', '742樓', '743樓', '744樓']]
			]
		};
	},
	methods: {
		bindMultiPickerChange(e) {
			this.multiIndex = e.detail.value;
			this.areaname = this.multiArray[0][e.detail.value[0]];
			this.buildingname = this.multiArray[1][e.detail.value[1]];
			this.floorname = this.multiArray[2][e.detail.value[2]];

			this.nowitem = this.multiArray[0][e.detail.value[0]] + '-' + this.multiArray[1][e.detail.value[1]] + '-' + this.multiArray[2][e.detail.value[2]];
			console.log('選擇了：' + this.nowitem);
		},
		bindMultiPickerColumnChange(e) {
			switch (e.detail.column) {
				case 0:
					this.firstid = e.detail.value;
					if (typeof this.hangdata[this.firstid][this.secondid] == 'undefined') {
						this.secondid = 0; //當第二列數據沒有上一個second列的狀況
					}
					switch (e.detail.value) {
						case this.firstid:
							Vue.set(this.multiArray, 1, this.column1data[this.firstid]);
							Vue.set(this.multiArray, 2, this.hangdata[this.firstid][this.secondid]); //爲了對應第三列關係
							break;
						default:
							break;
					}
					break;
				case 1:
					this.secondid = e.detail.value;
					if (typeof this.hangdata[this.firstid][this.secondid][this.thirdid] == 'undefined') {
						this.thirdid = 0; //當第三列數據沒有上一個列的狀況
					}
					switch (this.firstid) {
						case this.firstid:
							switch (this.secondid) {
								case this.secondid:
									Vue.set(this.multiArray, 2, this.hangdata[this.firstid][this.secondid]);
									break;
								default:
									break;
							}
							break;
						default:
							break;
					}
				case 2:
					this.thirdid = e.detail.value;
					break;
				default:
					break;
			}
		}
	}
};
</script>

<style lang="less"></style>