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Vue编写多地区选择组件

时间：2021-08-20 10:04:20 | 栏目：vue | 点击：次

看看效果图：

效果图

这里写图片描述

功能点:

!!!这是一个独立的组件,css预处理是用的scss;

写的过程遇到的问题:

因为这个功能会多次需要切换省份城市这些,所以我一次性拉取所有数据存储到localstorage,不然请求接口次数太多了

一开始的不限城市和不限地区我想并入JSON(重组JSON),但是发现虽然能降低处理麻烦,但是数据更乱了…非常不好维护,也有其他组件调用这个JSON的地方(比如其他组件有个地址的三级联动也是依赖这个JSON)

         *还有一个就是要考虑两边有不限制这东东的时候,要剔除不能存在的数据,比如你不限制城市,那所有该省份的城市都要干掉,不限制地区也是类似

写左右两边数据的对比是最恶心的,为什么这么说呢?

      *左边三级联动的,每个子项都有自己的id和name, 而选择的是组合成的(看GIF图),中间是中划线隔开,这对于推入和推出就带来一堆遍历和比较

      *我们这边的后端大佬说不限制的id均为0(城市或者地区),所以这个需要自行组合,最后就是动态图那格式的ID就是后台接受的,,多地区再拼接成字符串….'3-13-2,2-44-3,4-0-0'这种提交到后台..

联动JSON数据格式

regionName: 项的名称
regionId: 项的ID
child: 是否包含有子项

本来想写个props映射下regionName,regionId,child; 但是感觉作用不大,就没写了,(一般公司的地区JSON格式定下来了之后变动的可能性太低)

你能学到什么?

1: 数组的比对,数组的遍历,数组的组合及响应判断
2: vue一些内置指令的使用
3: 组件功能细节的考虑,不限制地区,全部这些按钮在什么情况下能点击
4: 清空数据之后各个状态的恢复和重置等等

代码

manyAreaSelect.vue

<template>
 <div class="manyAreaSelect">
 <div class="item">
  <div class="item-title">
  <span> 选择省</span>
  </div>
  <div class="item-content">
  <ul>
   <li v-for="(item,index) in chinaArea" :class="item.selected?'active':''" :key="index" @click="getCityList(item)">{{item.regionName}}</li>
  </ul>
  </div>
  <div class="item-footer"></div>
 </div>
 <div class="item">
  <div class="item-title">
  <span>选择市</span>
  </div>
  <div class="item-content">
  <ul v-show="cityList.length===0">
   <li>
   <<请选择省份</li>
  </ul>
  <ul v-show="!notLimitButton.notLimitCity &&cityList.length!==0">
   <li v-for="(item,index) in cityList" :class="item.selected ? 'active':''" :key="index" @click="getDistricList(item)">{{item.regionName}}</li>
  </ul>
  </div>
  <div class="item-footer">
  <button class="button" :class="notLimitButton.notLimitCity?'success':''" @click="cityNotLitmit({regionName:'不限',regionId:'0'})" size="mini" :disabled="!selectItem.province.regionName">不限城市</button>
  </div>
 </div>
 <div class="item">
  <div class="item-title">
  <span>选择地区</span>
  </div>
  <div class="item-content">
  <ul v-show="districList.length===0">
   <li>
   <<请选择城市</li>
  </ul>
  <ul v-show="!notLimitButton.notLimitCity && !notLimitButton.notLimitDistrict && districList.length!==0">
   <li v-for="(item,index) in districList" :class="item.selected?'active':''" :key="index" @click="getAreaCombineID(item)">{{item.regionName}}</li>
  </ul>
  </div>
  <div class="item-footer">
  <button class="button" :class="notLimitButton.notLimitDistrict ?'success':''" @click="districNotLitmit({regionName:'不限',regionId:'0'})" :disabled="!selectItem.city.regionName ||!selectItem.province.regionName || notLimitButton.notLimitCity ">不限地区</button>
  </div>
 </div>
 <div class="trangle">
  <div class="trangle-wrap">
  <div class="left">
   <button class="button" @click="transferToRight" :disabled="direactionStatusToRight">
   <i :class="this.iconDirection.right"></i>
   </button>
  </div>
  <div class="right">
   <button class="button" @click="transferToLeft" :disabled="direactionStatusToLeft">
   <i :class="this.iconDirection.left"></i>
   </button>
  </div>
  </div>
 </div>
 <div class=" item ">
  <div class="item-title ">
  <span>已选位置</span>
  </div>
  <div class="item-content ">
  <ul class="selectedContent">
   <li v-for="(item,index) in selectedList" :class="item.selected?'active':''" :key="index" @click="selectedAreaSingle(item)">{{item.regionName}}</li>
  </ul>
  </div>
  <div class="item-footer">
  <button class="button" @click="selectedAllArea()" :disabled="rightDataList.length=== 0" :class="selectedAllButtonStatus?'success':''">{{selectedAllButtonStatus?'反选':'全部'}}</button>
  </div>
 </div>
 </div>
</template>

<script>
 import _ from 'lodash';
 export default {
 name: 'manyAreaSelect',
 data: function () {
  return {
  chinaArea: JSON.parse(window.localStorage.getItem('chinaArea')) || [], // 这是地区联动的JSON
  notLimitButton: {
   notLimitCity: false, // 城市不限
   notLimitDistrict: false, // 地区不限
  },
  selectedAllButtonStatus: false, // 已选位置列表全部按钮的状态
  selectItem: {
   province: {},
   city: {},
   distric: {}
  },
  cityList: [], // 城市列表
  districList: [], // 区域列表
  rightDataList: [], // 选中项目组合成的渲染列表
  rightData: [], // 选中需要移除的
  leftData: [], // 左边选中的转发
  }
 },
 props: {
  selectedData: {
  type: [String, Object, Array]
  },
  iconDirection: {
  type: Object,
  default: function () { // 箭头图标
   return {
   left: 'fzicon fz-ad-you',
   right: 'fzicon fz-ad-right'
   }
  }
  }
 },
 computed: {
  selectedList () { // 已选中列表
  if (this.selectedData && this.selectedData !== '') {
   this.rightDataList = this.selectedData;
   return this.rightDataList;
  } else {
   return this.rightDataList;
  }

  },
  direactionStatusToRight () { // 控制可以转移的箭头状态
  if (this.notLimitButton.notLimitCity || this.notLimitButton.notLimitDistrict) {
   if (this.notLimitButton.notLimitCity) {
   this.removeAllSelected(this.cityList);
   this.removeAllSelected(this.districList);
   return false;
   } else {
   if (this.notLimitButton.notLimitDistrict) {
    this.removeAllSelected(this.districList);
    return false;
   }
   }
   return false;
  } else {
   if (this.selectItem.distric.regionName) {
   return false;
   }
   return true;
  }
  },
  direactionStatusToLeft () { // 控制可以转移的箭头状态
  if (this.rightData.length === 0) {
   return true
  } else {
   return false
  }
  }
 },
 methods: {
  mapSelect (list, value, type) { // 高亮选中
  if (type) {
   return list.map(pitem => {
   if (pitem.regionId === value.regionId) {
    if (value.selected && value.selected === true) {
    this.$delete(pitem, 'selected');
    } else {
    this.$set(pitem, 'selected', true)
    }
   }
   })
  } else {
   return list.map(pitem => {
   if (pitem.regionId === value.regionId) {
    if (value.selected && value.selected === true) {
    this.$delete(pitem, 'selected');
    } else {
    this.$set(pitem, 'selected', true)
    }
   } else {
    this.$delete(pitem, 'selected');
   }
   })
  }
  },
  resetToDefault () {
  this.leftData = []; // 清空需要转移的数组
  this.notLimitButton = { // 重置按钮状态
   notLimitCity: false, // 城市不限
   notLimitDistrict: false, // 地区不限
  };
  this.selectItem.city = {};
  this.selectItem.distric = {}
  this.removeAllSelected(this.cityList); // 清除选中状态
  this.removeAllSelected(this.districList); // 清除选中状态
  this.cityList = [];
  this.districList = [];
  },
  getCityList (item) {
  this.resetToDefault();
  if (item) {
   this.cityList = item.child; // 获取城市列表
   this.selectItem.province = item; // 保存省份对象
   this.mapSelect(this.chinaArea, item); // 高亮选择,单选
  }
  },
  getDistricList (item) {
  this.leftData = []; // 清空需要转移的数组
  this.notLimitButton.notLimitDistrict = false; // 重置按钮状态
  this.removeAllSelected(this.districList); // 清除选中状态
  this.selectItem.distric = {};
  this.districList = [];
  if (item) {
   this.districList = item.child; // 获取区域列表
   this.selectItem.city = item; // 保存省份对象
   this.mapSelect(this.cityList, item); // 高亮选择,单选
  }

  },
  getAreaCombineID (item) { // 获取组合ID
  if (item) {
   this.selectItem.distric = item;
   this.mapSelect(this.districList, item, 'manySelect'); // 区域高亮选择,多选

   this.leftData.push({
   regionName: this.selectItem.province.regionName + '-' + this.selectItem.city.regionName + '-' + item.regionName,
   regionId: this.selectItem.province.regionId + '-' + this.selectItem.city.regionId + '-' + item.regionId
   })
   this.leftData = _.uniqBy(this.leftData, 'regionId');
   if (this.leftData.length === this.districList.length) {
   this.leftData = [];
   this.notLimitButton.notLimitDistrict = true; // 转为不限制地区
   this.leftData.push({
    regionName: this.selectItem.province.regionName + '-' + this.selectItem.city.regionName + '-不限',
    regionId: this.selectItem.province.regionId + '-' + this.selectItem.city.regionId + '-0'
   })
   }
  }

  },
  cityNotLitmit (item) { // 城市不限
  this.leftData = []; // 请空数组
  this.notLimitButton.notLimitCity = !this.notLimitButton.notLimitCity; // 不限按钮状态
  this.leftData.push({
   regionName: this.selectItem.province.regionName + '-不限-不限',
   regionId: this.selectItem.province.regionId + '-0-0'
  })
  },
  districNotLitmit (item) { // 区域不限
  this.leftData = []; // 请空数组
  this.notLimitButton.notLimitDistrict = !this.notLimitButton.notLimitDistrict; // 不限按钮状态
  this.leftData.push({
   regionName: this.selectItem.province.regionName + '-' + this.selectItem.city.regionName + '-不限',
   regionId: this.selectItem.province.regionId + '-' + this.selectItem.city.regionId + '-0'
  })
  },
  transferToRight () { // 选中推入到已选中列表区域
  if (this.leftData && this.leftData.length !== 0) {
   if (this.leftData.length === 1) { // 长度只有1,那就只有不限城市或者地区了
   let limitId = this.leftData[0].regionId.split('-'); // 比对比对,切割成数组
   this.rightDataList.map(item => {
    let id = item.regionId.split('-');
    if (limitId[0] === id[0]) {
    if (limitId[1] === '0') { // 不限城市
     this.rightDataList = this.rightDataList.filter(ritem => {
     let rid = ritem.regionId.split('-');
     if (limitId[0] !== rid[0]) {
      return ritem;
     }
     })
    } else {
     if (limitId[2] === '0') { // 不限地区
     this.rightDataList = this.rightDataList.filter(ritem => {
      let rid = ritem.regionId.split('-');
      if ((limitId[0] === rid[0] && limitId[1] === rid[1])) {
      if (ritem[2] === '0') {
       return ritem;
      }
      } else {
      if (limitId[0] !== rid[0] || limitId[1] !== rid[1]) {
       return ritem;
      }
      }
     })
     } else {
     this.rightDataList = this.rightDataList.filter(ritem => {
      let rid = ritem.regionId.split('-');
      if (limitId[0] === rid[0]) {
      if (limitId[1] === rid[1]) {
       if (!(rid[2] === '0')) {
       return ritem;
       }
      } else {
       if (!(rid[1] === '0')) {
       return ritem
       }
      }
      } else {
      return ritem
      }
     })
     }
    }

    }
   })
   } else {
   let limitId = this.leftData[0].regionId.split('-'); // 比对比对,切割成数组
   this.rightDataList = this.rightDataList.filter(ritem => {
    let rid = ritem.regionId.split('-');
    if (limitId[0] === rid[0]) {
    if (limitId[1] === rid[1]) {
     if (!(rid[2] === '0')) {
     return ritem;
     }
    } else {
     if (!(rid[1] === '0')) {
     return ritem
     }
    }
    } else {
    return ritem
    }
   })
   }
   this.leftData.map(item => {
   this.rightDataList.push(item);
   })
   this.rightDataList = _.uniqBy(this.rightDataList, 'regionId');
   this.resetToDefault();
  }


  },
  selectedAreaSingle (item) { // 已选择区域单个选择
  if (item) {
   this.rightData = [];
   this.mapSelect(this.rightDataList, item, 'manySelect'); // 区域高亮选择,多选
   this.rightDataList.map(item => {
   if (item.selected) {
    this.rightData.push(item)
   }
   })
  }

  },
  selectedAllArea () { // 已选中区域全选反选
  if (this.selectedAllButtonStatus) {
   this.removeAllSelected(this.rightDataList);
   this.rightData = [];
  } else {
   this.rightDataList.map(item => this.$set(item, 'selected', true));
   this.rightData = this.rightDataList;
  }
  this.selectedAllButtonStatus = !this.selectedAllButtonStatus;
  },
  transferToLeft () { // 从已选中列表区域退回待转发区域
  if (this.rightData && this.rightData.length !== 0) {
   this.rightDataList = this.rightDataList.filter(item => {
   if (!item.selected) {
    return item;
   }
   })
   this.rightData = [];
  }
  },
  removeAllSelected (list) { // 清空选中状态
  list.map(item => this.$delete(item, 'selected'));
  }
 },
 watch: {
  'rightDataList' (newValue, oldValue) { // 选择列表的值变动响应外部值的变动
  if (newValue.length !== this.rightData.length) {
   this.selectedAllButtonStatus = false;
  } else {
   if (newValue.length === 0) {
   this.selectedAllButtonStatus = false;
   } else {
   this.selectedAllButtonStatus = true;
   }
  }
  this.$emit('update:selectedData', newValue);
  }
 }
 }
</script>

<style scoped lang="scss">
 ul {
 padding: 0;
 margin: 0;
 max-height: 100%;
 overflow-y: auto;
 li {
  cursor: pointer;
  text-align: center;
  padding: 5px;
  &.active,
  &:hover {
  background: #e4e8f1;
  color: #48576a;
  }
 }
 }

 .manyAreaSelect {
 position: relative;
 z-index: 2005;
 .item {
  border: 1px solid #d1dbe5;
  background: #fff;
  box-shadow: 0 2px 4px rgba(0, 0, 0, .12), 0 0 6px rgba(0, 0, 0, .04);
  display: inline-block;
  vertical-align: middle;
  min-width: 180px;
  box-sizing: border-box;
  position: relative;
  height: 100%;
  min-height: 260px;
 }
 .item-title {
  height: 36px;
  line-height: 36px;
  background: #fbfdff;
  margin: 0;
  border-bottom: 1px solid #d1dbe5;
  box-sizing: border-box;
  color: #1f2d3d;
  text-align: center;
 }
 .trangle {
  background: transparent;
  display: inline-block;
  vertical-align: middle;
  width: 40px;
  box-sizing: border-box;
  height: 100%;
  position: relative;
  .trangle-wrap {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  }
  .left,
  .right {
  margin: 10px 5px;
  }
  ;
 }

 .item-content {
  font-size: 13px;
  height: 190px;
  padding: 8px 2px;
 }
 .item-footer {
  padding: 5px 0;
  height: 40px;
  text-align: center;
 }
 }

 .selectedContent {
 li {
  text-align: left;
  padding-left: 25px;
 }
 }



 .button {
 display: inline-block;
 line-height: 1;
 white-space: nowrap;
 cursor: pointer;
 background: #fff;
 border: 1px solid #c4c4c4;
 color: #1f2d3d;
 margin: 0;
 border-radius: 4px;
 padding: 4px;
 font-size: 12px;
 border-radius: 4px;
 -webkit-appearance: button;
 outline: none;
 &.success {
  background: #42d885;
  border-color: #42d885;
  color: #fff;
 }

 &:disabled {
  color: #bfcbd9;
  cursor: not-allowed;
  background-image: none;
  background-color: #eef1f6;
  border-color: #d1dbe5;
 }
 }
</style>

用法

<!--selectedData就是响应的数据.sync是2.3回归的语法糖-->
<!--可以绑定iconDirection传入箭头的iconfont,Object-->

<many-area-select :selectedData.sync="manyAreaValue"></many-area-select>

总结

这个组件的出炉,折腾了很久..

写的过程推倒了三版(三天三个版本),都是思路没想对和理清..写着写着就写不下去了…

这个组件目前的功能是满足我这边的需求的,若是有更好的实现方式可以留言。

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