在router.navigate之后没有调用ngOnInit

Question

我的Angular应用程序突然没有调用ngOnInit(),router.navigation()这意味着我的组件无法正确加载.我认为这可能是由于我做出的一些改变,但恢复改变并没有解决问题.

正常导航导致组件无法正确加载的示例; 此页面由以下代码列表导航 this.router.navigate(['/result', this.params.data._id]);:

重新加载页面,组件正确加载:

以下是我的一些代码清单,

app.module.ts

@NgModule({
  imports: [
    BrowserModule,
    FormsModule,
    AppRoutingModule,
    AgGridModule.withComponents(
            [SampleResultButtonComponent]
        ),
    ChartsModule
  ],
  declarations: [
    AppComponent,

    LoginComponent,
    LogoutComponent,
    SignupComponent,

    FilesComponent,
    NavbarComponent,
    ProfileComponent,
    UploadComponent,
    SampleGridApplicationComponent,
    SampleResultButtonComponent,
    AssetGridApplicationComponent,
    ResultComponent,
    ResetPasswordComponent,
    AssetComponentDetailComponent
  ],
  bootstrap: [ AppComponent ],
  entryComponents: [AssetComponentDetailComponent]
})
export class AppModule {}

APP-routing.module.ts

    @Injectable()
export class NoAuthGuard implements CanActivate {
  constructor(private router: Router) {}

  canActivate() {
    const activeUser = Kinvey.User.getActiveUser();
    if (activeUser) {
      return true;
    }

    // Navigate to the login page
    this.router.navigate(['/login']);
    return false;
  }
}

@Injectable()
export class AuthGuard implements CanActivate {
  constructor(private router: Router) {}

  canActivate() {
    const activeUser = Kinvey.User.getActiveUser();
    console.log("AuthGuard, CanActivate");
    if (!activeUser) {
      return true;
    }

    // Navigate to the main page
    this.router.navigate(['']);
    return false;
  }
}

const appRoutes: Routes = [
  {
    path: '',
    component: NavbarComponent,
    canActivate: [NoAuthGuard],
    children: [
      { path: '', component: SampleGridApplicationComponent },

      { path: 'files', component: FilesComponent },
      { path: 'upload', component: UploadComponent },

      { path: 'profile', component: ProfileComponent },

      { path: 'sampleitems', component: SampleGridApplicationComponent },
      { path: 'assetitems', component: AssetGridApplicationComponent },
      { path: 'result/:id', component: ResultComponent}

    ]
  },
  { path: 'login', component: LoginComponent, canActivate: [AuthGuard] },
  { path: 'logout', component: LogoutComponent },
  { path: 'signup', component: SignupComponent, canActivate: [AuthGuard] },
  { path: 'reset', component: ResetPasswordComponent, canActivate: [AuthGuard] }
];
@NgModule({
  imports: [
    RouterModule.forRoot(appRoutes, {useHash: true})
  ],
  exports: [
    RouterModule
  ],
  providers: [
    AuthGuard,
    NoAuthGuard
  ]
})
export class AppRoutingModule {}

编辑 经过多次挖掘后,我认为问题与此处的问题有关,但建议的修复程序无法解决此问题.

Answer 1

看来这个问题仍然存在,即使5.0已经发布,至少问题https://github.com/angular/angular/issues/18254尚未解决.好消息是该问题中描述了一种解决方法,使用:

        this.zone.run(() => {
          this.router.navigateByUrl( url );
        });

我在Firebase的onAuthStateChanged回调中遇到了问题,上面的解决方法也有帮助.

Answer 2

该问题最终是 Angular Router 中的一个错误，降级到版本 4.1.3 修复了该问题。希望这对尝试使用 Kinvey SDK 的最新版本 Angular 的其他人有所帮助。