HarmonyOS 鸿蒙Next中@State url赋值后，web不加载

HarmonyOS 鸿蒙Next中@State url赋值后，web不加载 通过web加载H5页面，H5的url不同的方式获取，web的加载不一样。两种方式会自动加载，两种方式不会加载。直接赋值，或者取前面页面传过来的参数都可以自动加载。但是通过方法获取再赋值后，web不加载。这个是什么原因？

代码如下

@Component
export struct Portal {
  private context = getContext(this) as common.UIAbilityContext;
  webViewController: webview.WebviewController = new webview.WebviewController();
  [@State](/user/State) url: string = '';
  private backPressedTime: number = 0
  [@State](/user/State) webViewBridge: WebViewBridge = new WebViewBridge(this.webviewController)
  [@State](/user/State) showProgressDialog: boolean = false

  aboutToAppear():void {
    // 检查隐私政策更新状态
    Logger.debug('Portal => about to appear')
    Logger.debug('Portal => param is : ', '' + Router.getRouter(RouterConstants.ENTRY_ROUTER_NAME)
      .getParamByName('Portal'))

    // 这样写wew不会自动加载
    OfflineModuleManage
      .queryModuleUrl(OfflineModuleConstants.OFFLINE_MODULE_HOMEPAGE_MODULE_ID,'/mypage/homepage')
      .then((data:string) => {
        Logger.debug('Portal => queryModuleUrl data is : ' + data)
        this.url = 'xxxxxx/homepage'
        Logger.debug('Portal => queryModuleUrl data is : ' + data)
      })
      .catch((err:BusinessError) => {
        Logger.error(`Portal => queryModuleUrl异常，code is : ${err.code}`, `message is : ${err.message}`)
      })

    // 定义一个eventId为1的事件
    let event: emitter.InnerEvent = {
      eventId: WebConstants.SHOW_PROGRESS_DIALOG_NOTIFICATION_EVENT_ID
    }

    // 收到eventId为1的事件后执行该回调
    let callback = (eventData: emitter.EventData): void => {
      Logger.info('event callback:' + JSON.stringify(eventData));
      this.showProgressDialog = eventData.data?.isShow
    }

    // 订阅eventId为1的事件
    emitter.on(event, callback)

    Logger.debug('路由全路径：' + JSON.stringify(Router.getRouter(RouterConstants.ENTRY_ROUTER_NAME)
      .getAllPathName()))
    Logger.debug('自己记录的路由全路径：' + JSON.stringify(Router.getRouterTrack(RouterConstants.ENTRY_ROUTER_NAME)))
  }

  build() {
    NavDestination() {
      Stack({ alignContent: Alignment.Center }) {
        Web({
          src: this.url,
          controller: this.webviewController
        })
          .javaScriptAccess(true)
          .onControllerAttached(() => {
            Logger.debug('WebBuilder => onControllerAttached')
            WebUtil.registerJavaScriptProxy(this.webviewController)
          })
          .onPageBegin((event) => {
            Logger.debug('WebBuilder => onPageBegin')
          })
          .onInterceptRequest((event) => {
            Logger.debug('WebBuilder => onInterceptRequest : ', '' + event?.request.getRequestUrl())
            return null
          })
          .onPageEnd((event) => {
            Logger.debug('WebBuilder => onPageEnd')
          })
          .onErrorReceive((event) => {
            Logger.debug('WebBuilder => onErrorReceive is : url is : ' + event?.request.getRequestUrl() + '；method is : ' + event?.request.getRequestMethod() + '；header is : ' + event?.request.getRequestHeader())
            Logger.debug('WebBuilder => onErrorReceive code is : ' + event?.error.getErrorCode() + ', info is : ' + event?.error.getErrorInfo())
          })
          .domStorageAccess(true)
          .width('100%')
          .height('100%')

        if (this.showProgressDialog) {
          LoadingLayout()
        }
      }
    }
    .hideTitleBar(true)
    .onBackPressed(() => {
      if (systemDateTime.getTime(false) - this.backPressedTime > 2000) {
        promptAction
          .showToast({
            message: '再按一次退出程序',
            duration: 2000
          })
        this.backPressedTime = systemDateTime.getTime(false)
      } else {
        this.context?.terminateSelf()
      }

      return true
    })
    .onShown(() => {
      Logger.debug('路由全路径：' + JSON.stringify(Router.getRouter(RouterConstants.ENTRY_ROUTER_NAME)
        .getAllPathName()))
      Logger.debug('自己记录的路由全路径：' + JSON.stringify(Router.getRouterTrack(RouterConstants.ENTRY_ROUTER_NAME)))
    })
  }
}