本文介绍了在新路由器上使用订阅功能时出现Angular 2 typescript错误(rc 1)的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我正在尝试使用新路由器为我的Angular 2应用设置身份验证。有人建议尝试以下方法:

I am trying to set up authentication for my Angular 2 app with the new router. Someone suggested to try the following:

constructor (private _router: Router) {}

ngOnInit(){
  this._router.subscribe(
    next => {
      if (!userIsLoggedInOrWhatever) {
        this._router.navigate(['Login']);
      }
    }
  )
}

然而这个问题是这导致打字稿错误

This problem however is that this results in the typescript error

这很奇怪,因为清楚地显示了一个Router对象确实有这个功能。我可以调用其他函数比如router.navigate(['/ url'])。你们知道这可能是什么问题吗?

This is strange because the documentation clearly shows that a Router object does have this function. I am able to call other functions like router.navigate(['/url']). Do you guys have an idea what could be the problem?

推荐答案

新路由器

constructor(router:Router) {
  router.events.subscribe(event:Event => {
    if(event instanceof NavigationStart) {
    }
    // NavigationEnd
    // NavigationCancel
    // NavigationError
    // RoutesRecognized
  })
}

原始

路由器类有一个 EventEmitter 更改您可以订阅:

The Router class has an EventEmitter changes you can subscribe to:

ngOnInit(){
  this._router.changes.subscribe(
    next => {
      if (!userIsLoggedInOrWhatever) {
        this._router.navigate(['Login']);
      }
    }
  )
}

关于如何获取上一条路线,请参阅( pairwise()

For how to get the previous route see How to detect a route change in Angular 2? (pairwise())

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08-18 12:18