1、页面中使用form表单，引入select组件

当data中默认没有定义form.region的值时，会出现选择select后input没有回显选择数据值；所以使用select时，必须定义默认值

<el-form ref="form" :model="form" label-width="80px"><el-form-item label="活动名称"><el-input v-model="form.name"></el-input></el-form-item><el-form-item label="活动区域"><el-select v-model="form.region" placeholder="请选择活动区域"><el-option label="区域一" value="shanghai"></el-option><el-option label="区域二" value="beijing"></el-option></el-select></el-form-item>
</el-form>
<script>export default {data() {return {form: {name: '',region: ''}}},methods: {onSubmit() {console.log('submit!');}}}
</script>

2、嵌套层次过多，select选中值页面不回显的解决方法，动态表单props的绑定

强制重新加载页面@visible-change=“$forceUpdate()”

<el-form ref="form" :model="form" :rules="rules" label-width="80px" size="small">
<el-form-item label="备注" prop="remark"><el-input v-model="form.remark" placeholder="请输入备注"/>
</el-form-item>
<el-row v-for="(item,index) in form.details" :key="index"><el-col :span="12"><el-form-item label="活动区域" :prop="'details['+index+']region'" label-width="75px"><el-select v-model="form.region" placeholder="请选择活动区域" @visible-change="$forceUpdate()"><el-option label="区域一" value="shanghai"></el-option><el-option label="区域二" value="beijing"></el-option></el-select></el-form-item></el-col><el-col :span="12"><el-form-item label="是否启用" :prop="'details['+index+']status'" label-width="75px"><el-switch v-model="item.status" active-value="Y" inactive-value="N" @change="$forceUpdate()"></el-switch></el-form-item></el-col>
</el-row>
</el-form>//也可在方法中使用
methods:{update(){this.$forceUpdate();//强制刷新视图}
}