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
	}
}