添加banner新增文案

src/views/business/banner/components/BannerCreate.vue

@@ -43,6 +43,7 @@
             v-model="bannerPicUrl"
             :limit="1"
           />
+          <div class="tip">图片尺寸 700 * 300</div>
         </el-form-item>
         <el-form-item label="类型" prop="type">
           <el-radio-group v-model="form.type" size="small" @change="changeType">
@@ -247,4 +248,8 @@ export default {
   align-items: center;
   justify-content: space-between;
 }
+.tip {
+    font-size: 12px;
+    color: #999;
+  }
 </style>