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;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>