uniapp picker 多列选择器联动筛选器交互处理方法，
uniapp 多列选择器 mode="multiSelector" 数据及筛选联动交互处理，
通过接口获取数据，根据用户选择当前列选项设置子列数据，实现三级联动效果，
本示例中处理了三级无数据时则从数据中删除，处理三级后二级无数据时则亦从数据中删除，删除的数据最终不展示在筛选器中。
html
<picker mode="multiSelector" @change="bindMultiPickerChange" @columnchange="bindMultiPickerColumnChange" :value="multiIndex" :range="communityListArray" range-key="label"><view class="picker">{{communityListArray[0][multiIndex[0]].label ? communityListArray[0][multiIndex[0]].label + '，' : ''}}{{communityListArray[1][multiIndex[1]].label ? communityListArray[1][multiIndex[1]].label + '，' : ''}}{{communityListArray[2][multiIndex[2]].label ? communityListArray[2][multiIndex[2]].label : '请选择所属社群'}}</view>
</picker>data设置参数数据
data() {return {communityListArray : [],multiIndex : [],}
}created 或 onLoad 中，调用请求接口获取筛选项数据方法
this.communityListDataSet();接口获取筛选项数据，如 res.data：
[{id: 3,label: "天津",parent_id: 0,children: [{id: 51035,label: "东丽区",parent_id: 3,cityCommunity: [// 无社群数据],},],},{id: 1,label: "北京",parent_id: 0,children: [{id: 72,label: "朝阳区1",parent_id: 1,cityCommunity: [{area_id: 72, id: 13, label: "朝阳区1-社群名称",}],},{id: 73,label: "朝阳区2",parent_id: 1,cityCommunity: [// 无社群数据],}],},{id: 2,label: "上海",parent_id: 0,children: [{id: 78,label: "黄浦区",parent_id: 2,cityCommunity: [{area_id: 78, id: 16, label: "黄浦区-社群名称",}],},{id: 2813,label: "徐汇区",parent_id: 2,cityCommunity: [{area_id: 2813, id: 17, label: "徐汇区-社群名称",}],}],},{id: 4,label: "重庆",parent_id: 0,children: [{id: 119,label: "南川区",parent_id: 4,cityCommunity: [{area_id: 119, id: 5, label: "南川区-社群名称111",},{area_id: 119, id: 6, label: "南川区-社群名称222",}],}],},
]methods 处理方法：
// 请求接口获取筛选项数据
communityListDataSet(){...this.communityListData = res.data;this.manageCommunityListThreeLevel()...
},/*
处理接口返回数据：筛选项数据删除无社群数据的城市、省份
如：天津、北京-朝阳区2，无社群数据
*/
// 处理三级无社群数据
manageCommunityListThreeLevel(){let communityLen = this.communityListData.lengthfor(var i=communityLen-1;i>=0;i--){let communityChildrenLen = this.communityListData[i].children.lengthfor(var j=communityChildrenLen-1;j>=0;j--){if(!this.communityListData[i].children[j].cityCommunity.length){this.communityListData[i].children.splice(j,1)}}}this.manageCommunityListTwoLevel()
},
// 处理二级无城市数据
manageCommunityListTwoLevel(){let communityLen = this.communityListData.lengthfor(var i=communityLen-1;i>=0;i--){if(!this.communityListData[i].children.length){this.communityListData.splice(i,1)}}this.communityListArray = [this.communityListData,this.communityListData[0].children,this.communityListData[0].children[0].cityCommunity,]
},// value 改变时触发 change 事件
bindMultiPickerChange: function (e) {// console.log(e)this.multiIndex = e.detail.value
},
// 某一列的值改变时触发 columnchange 事件
bindMultiPickerColumnChange: function (e) {if(!this.multiIndex){this.multiIndex = [0,0,0]}let column = e.detail.column;let value = e.detail.value;// console.log(column , value);let multiIndex = this.multiIndex;multiIndex[column] = value;if(column == 0){multiIndex[1] = 0;multiIndex[2] = 0;}if(column == 1){multiIndex[2] = 0;}this.multiIndex = multiIndex;let communityListArray = [];communityListArray[0] = this.communityListData;communityListArray[1] = this.communityListData[multiIndex[0]].children;if(this.communityListData[multiIndex[0]].children[multiIndex[1]].cityCommunity){communityListArray[2] = this.communityListData[multiIndex[0]].children[multiIndex[1]].cityCommunity;}else{communityListArray[2] = [];}this.communityListArray = communityListArray;
},交互效果截图
最终处理后的数据，天津、北京-朝阳区2，已从筛选器中删除
)
)
