在rxjs中的subscribe功能块内部处理/取消订阅

Question

I've a subject called authenticated in _auth service.

I want to dispose/unsubscribe it if some condition fails so that this subscribe doesn't call when next value arrives in authenticated subject.

                this.sub = this._auth.authenticated
                .subscribe((loggedIn) => {
                    if (!loggedIn) {
                        this.sub.dispose(); // doesn't work because this.sub is null
                        this._location.replaceState('/');
                        this._auth.doLogout(); // emits value again in authenticated subject
                    }
                });

What is the rxjs-5 way of doing it?

Answer 1

你持有对可观察的Eg：obs $的引用并且调用obs $ .unsubscribe（）;