ReactiveX 学习笔记（13）基础类型

Key Types and Life Management

本文主题是 Rx 中的基础类型 Subject 类及其生命周期的管理。

公共代码

• RxNET

private static void WriteSequenceToConsole(IObservable<string> sequence)
{
    sequence.Subscribe(Console.WriteLine);
}

• RxSwift

extension ObservableType {
    func addObserver(_ id: String) -> Disposable {
        return subscribe { print("Subscription:", id, "Event:", $0) }
    }
}
func writeSequenceToConsole<O: ObservableType>(name: String, sequence: O) -> Disposable {
    return sequence.subscribe { event in
        print("Subscription: \(name), event: \(event)")
    }
}

Subject<T>

Subject<T>：同时实现了IObservable<T>和IObserver<T>。

• RxNET

var subject = new Subject<string>();
WriteSequenceToConsole(subject);
subject.OnNext("a");
subject.OnNext("b");
subject.OnNext("c");
/*
a
b
c
*/

var subject = new Subject<string>();
subject.OnNext("a");
WriteSequenceToConsole(subject);
subject.OnNext("b");
subject.OnNext("c");
/*
b
c
*/

• RxJava

val subject = PublishSubject.create<Int>()
subject.onNext(1)
subject.subscribe { println(it) }
subject.onNext(2)
subject.onNext(3)
subject.onNext(4)
/*
2
3
4
*/

• RxSwift

let disposeBag = DisposeBag()
let subject = PublishSubject<String>()
subject.addObserver("1").disposed(by: disposeBag)
subject.onNext("