使用element-ui制作三级级联城市选择器

1.效果预览:

2.引入资源文件

1.vue资源

<script src="https://unpkg.com/vue/dist/vue.js"></script>

2.elementUI资源

<link rel="stylesheet" href="https://unpkg.com/element-ui/lib/theme-chalk/index.css">
<script src="https://unpkg.com/element-ui/lib/index.js"></script>

3.city-data.js资源

地址：https://ele-cat.github.io/city-data-2d.js

3.业务代码

1.html代码

<div id="app">
　　<el-cascader :options="CityInfo" v-model="form.selectedOptions" :change-on-select="true" :clearable="true" :filterable="true" @change="handleChange">
　　</el-cascader>
　　<span>所选地区：{{form.city | myAddressCity}}{{form.area | myAddressArea}}{{form.minarea | myAddressMinarea}}</span>
</div>

2.js代码

    const app = new Vue({
      el: '#app',
      data: {
        CityInfo: CityInfo,
        form: {
          city: '',
          area: '',
          minarea: '',
          selectedOptions: [],//地区筛选数组
        },
      },
      created() {
      },
      methods: {
        handleChange(value) {
          this.form.city = this.form.selectedOptions[0];
          this.form.area = this.form.selectedOptions[1]
          this.form.minarea = this.form.selectedOptions[2]
        },
20　　　　},
      filters: {
        myAddressCity: function (value) {
          for (y in this.CityInfo) {
            if (this.CityInfo[y].value == value) {
              return value = this.CityInfo[y].label
            }
          }
        },
        myAddressArea: function (value) {
          for (y in this.CityInfo) {
            for (z in this.CityInfo[y].children) {
              if (this.CityInfo[y].children[z].value == value && value != undefined) {
                return value = this.CityInfo[y].children[z].label;
              }
            }
          }
        },
        myAddressMinarea: function (value) {
          for (y in this.CityInfo) {
            for (z in this.CityInfo[y].children) {
              for (i in this.CityInfo[y].children[z].children) {
                if (this.CityInfo[y].children[z].children[i].value == value && value != undefined) {
                  return value = this.CityInfo[y].children[z].children[i].label
                }
              }
            }
          }
        },
      },
    })

制作完成，其他更多用法参考官网：http://element-cn.eleme.io/#/zh-CN/component/cascader

后记1：在city-data.js中删除第三级地区，就可以实现省市二级联动.

　　　　地址：https://github.com/Ele-Cat/Ele-Cat.github.io/blob/master/city-data-2d.js

后记2：用vuejs+elementUI写了一个可查看全国城市的天气预报功能，项目演示地址：https://ele-cat.github.io/forecast/，代码地址：https://github.com/Ele-Cat/Ele-Cat.github.io/tree/master/forecast