uni-app 微信小程序 picker 三级联动

之前做过一个picker的三级联动功能，这里分享代码给大家

具体代码：

// 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; 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; 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; 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楼', '112楼', '113楼', '114楼']],
			multiIndex: [0, 0, 0],
			tabindex: 0,
			ydindex: 0,
			firstid: '0',
			secondid: '0',
			thirdid: '0',
			areaname: '1',
			dengswitchvalue: '',
			ktswitchvalue: '',
			buildingname: '1舍',
			floorname: '111楼',
			nowitem: '1-1舍-111楼',
			column1data: [
				//每个院部的楼栋
				['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: [
				//每一栋包含楼层
				[['111楼', '112楼', '113楼', '114楼'], ['121楼', '122楼', '123楼'], ['131楼', '132楼', '133楼', '134楼'], ['141楼', '142楼', '143楼', '144楼']],
				// [['211楼', '212楼', '213楼', '214楼'], ['221楼', '222楼', '223楼', '224楼'], ['231楼', '232楼', '233楼', '234楼'], ['241楼', '242楼', '243楼', '244楼']],
				[['211楼', '212楼', '213楼', '214楼']],
				// [['311楼', '312楼', '313楼', '314楼'], ['321楼', '322楼', '323楼', '324楼'], ['331楼', '332楼', '333楼', '334楼'], ['341楼', '342楼', '343楼', '344楼']],
				[['311楼', '312楼', '313楼', '314楼'], ['321楼', '322楼', '323楼']],
				[['411楼', '412楼', '413楼', '414楼'], ['421楼', '422楼', '423楼', '424楼'], ['431楼', '432楼', '433楼', '434楼'], ['441楼', '442楼', '443楼', '444楼']],
				[['511楼', '512楼', '513楼', '514楼'], ['521楼', '522楼', '523楼'], ['531楼', '532楼', '533楼', '534楼'], ['541楼', '542楼', '543楼', '544楼']],
				[['611楼', '612楼', '613楼', '614楼'], ['621楼', '622楼', '623楼', '624楼'], ['631楼', '632楼', '633楼', '634楼'], ['641楼', '642楼', '643楼', '654楼']],
				[['711楼', '712楼'], ['721楼', '722楼', '723楼'], ['731楼', '732楼', '733楼', '734楼'], ['741楼', '742楼', '743楼', '744楼']]
			]
		};
	},
	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('选择了：' + 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; //当第二列数据没有上一个second列的情况
					}
					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]); //为了对应第三列关系
							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; //当第三列数据没有上一个列的情况
					}
					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>