@change事件传参
@change="(value)=>handleChange(value, item,index)"
这样可以接收index参数区分是哪一个组件事件，又可以接收子组件传的value值
<div class="boxItem" v-for="(item, index) in checkPeopleList" :key="index"><div class="boxItem-title">审核人员 {{ index + 1 }}</div><div class="selectPeople"><el-select v-model="item.selectedValues" placeholder="选择审核人员" size="large" style="width: 240px"><template #empty="{}"><AreaTree @change="(value)=>handleChange(value, item,index)" /></template></el-select><!-- <el-cascader v-model="item.selectedValues" :options="options" :show-all-levels="false" /> --></div><!-- 新增删除按钮 --><div class="delete-button-container"><el-button v-if="index !== 0" @click="removeCheckPeople(index)" type="danger" circle size="small"icon="Delete"></el-button></div><!-- 新增的容器 --><div class="bottom-center-line-container"><el-button v-if="!item.hideAddButton" @click="addCheckPeople()" class="add-button" type="primary" circlesize="small"><el-icon><Plus color="#ffffff" size="" /></el-icon></el-button></div></div>
如果在模板中直接这样接收value参数，那么就value就拿不到
@change="handleChange(value, item,index)
