Angular 9 如何获取之前的路由路径 [英] Angular 9 how to get the previous route path

问题描述

我需要你的帮助来获取之前的路线.我正在使用下面的链接来获取它，但它不会在第一次触发...

I need your assistance to get the previous route path. I am using the below link to get that but it doesn't trigger at first time...

如何在 Angular 中确定上一页 URL?

constructor(router: Router) {
  router.events
  .pipe(filter(event => event instanceof NavigationEnd))
  .subscribe((event: NavigationEnd) => {
    console.log('prev:', event.previousUrl);
    this.previousUrl = event.url;
  });
}

我同时使用了 RoutesRecognized 和 NavigationEnd，但没有使用..

I used both RoutesRecognized and NavigationEnd but didn't get that..

我在构造函数和 ngOnInit 中调用了这个方法，但是每次第一次都没有触发......

I called this method in constructor and ngOnInit but every time it doesn't trigger at first time....

有什么办法吗，我能搞定...

is there any way, I can get that...

谢谢...

推荐答案

Router 类公开了一个 getCurrentNavigation() 方法:

The Router class exposes a getCurrentNavigation() method:

getCurrentNavigation(): Navigation|null {
  return this.currentNavigation;
}

Router.currentNavigation 属于 Navigation 类型:

private currentNavigation: Navigation|null = null;

正如我们从Navigation的定义中看到的，您可以使用previousNavigation 属性:

As we can see from Navigation's definition, you can access the previous navigation with the previousNavigation property:

previousNavigation: Navigation | null;

因此，您可以使用此属性获取先前的路径.

So, you could use this property to get the previous path.

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