新增动态表单组件 --- fix2

src/components/app-form-part/app-form-part.vue

 <template>
- <div class='app-form-part'>
+ <div class='app-form-part' v-if="formOption">
     <avue-form :option="formOption" v-model="formVal"></avue-form>
   </div>
 </template>