代金券可以修改名称、种类，不允许修改兑换群体

src/views/goods/voucher/index.vue

@@ -84,13 +84,13 @@
           <!-- 图片上传 -->
           <ImageUpload  @input="fileUpload" :value="form.photo" :limit="1" ></ImageUpload>
         </el-form-item>
-        <el-form-item v-if="isAdd" label="名称" prop="name" >
+        <el-form-item label="名称" prop="name" >
           <el-input v-model="form.name" placeholder="请输入名称" />
         </el-form-item>
-        <el-form-item v-if="isAdd" label="种类" prop="category">
+        <el-form-item label="种类" prop="category">
           <el-cascader v-model="form.category" :options="voucher_category" :props="{emitPath:false}"></el-cascader>
         </el-form-item>
-        <el-form-item label="可兑换群体" prop="tags">
+        <el-form-item v-if="isAdd" label="可兑换群体" prop="tags">
           <el-select v-model="form.tags" placeholder="请选择">
             <el-option v-for="dict in dict.type.receive_tags" :key="dict.value" :label="dict.label" :value="dict.value"></el-option>
           </el-select>