Angular 4/5 - 路线 paramMap 与 params

Question

我试图在我的 Angular 5 应用程序中获取 URL 参数，我找到了两种方法:

1) 使用paramMap

    ngOnInit() {
      this.hero$ = this.route.paramMap
        .switchMap((params: ParamMap) =>
          this.service.getHero(params.get('id')));
    }

2) 使用参数

    ngOnInit() {
      this.sub = this.route.params.subscribe(params => {
        this.id = +params['id'];
      });
    }

有区别吗？哪一种是最佳做法？

Answer 1

2021 年 9 月更新

以下答案不再正确，Angular team says :

There are no current plans to remove params or queryParams and there's no benefit to advising against their use.

过时的答案

根据文档:

Two older properties are still available. They are less capable than their replacements, discouraged, and may be deprecated in a future Angular version.

params — An Observable that contains the required and optional parameters specific to the route. Use paramMap instead.

简单高效!