HarmonyOS鸿蒙Next中Web组件加载问题

HarmonyOS鸿蒙Next中Web组件加载问题 我有一个h5链接需要用Web组件来加载，但是这个h5链接是通过请求一个接口来获取的，我在我的WebPage界面的aboutToAppear方法里去请求，定义了一个@state url变量，然后获取到这个链接，把这个链接赋值给这个url变量，但是我的页面没刷新也没任何效果，是url不能用@state修饰吗？

@State url: string = '';

aboutToAppear(): void {
  let params:object = router.getParams();
  this.loginId = params['loginId'];
  initRequest((result:string)=>{
  let jsonObject = json.parse(result);
  let flag:boolean = (jsonObject as object)?.["Result"]
  if(flag) {
    let url:string = (jsonObject as object)?.['url']
    this.url = url;
  }
})
}

build() {
    Column() {
      PageTitle({ titleName: this.title })

      Divider()
        .strokeWidth('1px')
        .color('#efefef')

      Web({
        src: this.url, controller: this.controller
      })
        .width('100%')
        .layoutWeight(1)
        .javaScriptAccess(true)
        .javaScriptProxy({
          object:this.stub,
          name:'stub',
          methodList:['getStr','toString'],
          controller:this.controller
        })
        .fileAccess(true)
        .domStorageAccess(true)
          // .imageAccess(true)
        .onlineImageAccess(true)
        .overviewModeAccess(true)
        .cacheMode(CacheMode.None)
        .zoomAccess(true)
        .onControllerAttached(async ()=>{
          console.log("onControllerAttached");
          try {
            let md5 = await StringUtils.md5(this.loginId)
            let userNewAgent = this.base64Encode(this.loginId+","+md5)
            let userAgent =  userNewAgent + "CMOA" + this.controller.getUserAgent();
            this.controller.setCustomUserAgent(userAgent);

            this.controller.loadUrl(this.url)
          } catch (error) {

          }
        })
        .onTitleReceive((event)=>{
          console.log("Result:",event.title)
        })
    }.width('100%').height('100%')
  }
}