fix: MainPage.ets, 国殇代码容错处理

@@ -12,6 +12,7 @@ import { StartupManager } from '../startupmanager/StartupManager';
 import { BusinessError } from '@kit.BasicServicesKit';
 import { BottomNavigationComponent } from './view/BottomNavigationComponent';
 import LaunchDataModel from './viewModel/LaunchDataModel';
+import { LaunchPageModel } from './viewModel/LaunchPageModel';
 
 const TAG = 'MainPage';
 
@@ -44,7 +45,13 @@ struct MainPage {
     })
 
     let dataModelStr : string = SPHelper.default.getSync(SpConstants.APP_LAUNCH_PAGE_DATA_MODEL,'') as string
-    if (dataModelStr) {
+    if (!dataModelStr) {
+      //请求启动页相关接口数据并保存
+      let launchPageModel = new LaunchPageModel()
+      launchPageModel.getLaunchPageData()
+      dataModelStr = SPHelper.default.getSync(SpConstants.APP_LAUNCH_PAGE_DATA_MODEL,'') as string
+
+    }
     let dataModel : LaunchDataModel = JSON.parse(dataModelStr)
     console.log(dataModelStr)
     // 处理国殇模式数据
@@ -53,7 +60,6 @@ struct MainPage {
     GrayManage.setMourning(mourns)
     AppStorage.setOrCreate('GrayManage', GrayManage)
   }
-  }
 
   pageTransition() {
     PageTransitionEnter({ type: RouteType.None, duration: 0 })