fix 修复主办方默认选中下标问题

 <!--
  * @Date: 2022-09-21 16:04:10
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2022-10-19 17:52:40
+ * @LastEditTime: 2022-10-19 18:06:30
  * @FilePath: /swx/src/pages/createActivity/index.vue
  * @Description: 创建活动页面
 -->
@@ -163,6 +163,7 @@
   <!-- 活动主办方弹出框 -->
   <van-popup :show="show_org_popup" position="bottom" custom-style="height: 40%;" :lock-scroll="true">
     <van-picker :show-toolbar="true" title="" confirm-button-text="确定" :columns="org_type_columns"
+      :default-index="defaultIndex"
       toolbar-class="picker-toolbar" @confirm="onOrgTypeConfirm" @cancel="onOrgTypeCancel" @change="onOrgTypeChange" />
   </van-popup>
   <!-- 报名信息弹出框 -->
@@ -730,6 +731,7 @@ const formatInfoDate = (date) => {
 }
 
 // 获取活动信息，还原
+const defaultIndex = ref(0);
 const html_content = ref('');
 const activity_id = ref('');
 const updateActivityInfo = async ({ activity, host }) => {
@@ -740,6 +742,12 @@ const updateActivityInfo = async ({ activity, host }) => {
     activity_id.value = activity.id;
     // 主办方
     org_type.value = my_hosts.filter(item => item.id === host.id)[0]['name'];
+    // 主办方默认选中下标
+    my_hosts.forEach((item, index) => {
+      if (item.id === host.id) {
+        defaultIndex.value = index;
+      }
+    });
     host_id.value = host.id;
     // 活动主题
     activity_name.value = activity.name;