RxSwiftでエラーを分岐するTips

potatotips #56 での発表資料です

https://potatotips.connpass.com/event/104242/

Transcript

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    औΓग़ͤΔΑ͏ͳϝιουΛ༻ҙ extension ObservableType where E: EventConvertible { public func elements() -> Observable<E.ElementType> { return filter { $0.event.element != nil } .map { $0.event.element! } } public func errors() -> Observable<Swift.Error> { return filter { $0.event.error != nil } .map { $0.event.error! } } } // 1. Observable<E>ͷE͕EventConvertible४ڌͰ͋Ε͹࢖͑ΔΑ͏ʹͳΔ // ྫ͑͹ Observable<Event<E>> ͱ͔ // 2_1. Πϕϯτͷਖ਼ৗܥelementͷΈΛฦ͢Α͏ʹ͢Δ͚ͩ // 2_2. ΠϕϯτͷΤϥʔͷΈΛฦ͢Α͏ʹ͢Δ͚ͩ
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12. let result = Observable.of(1, 2) .flatMap { _ -> Observable<Event<String>> in let observable = Observable<String>.create { observer in observer.onNext("A") observer.onError(TestError.test) observer.onNext(“B") observer.onCompleted() return Disposables.create() } return observable.materialize() } output1 = result .elements() .subscribe(onNext: { print("elements, onNext: \($0)”) }, onError: { print("elements, onError: \($0)") },) error = result .errors() .subscribe(onNext: { print("errors, onNext: \($0)") }, onError: { print("errors, onError: \($0)") }) —— ग़ྗ —— elements, onNext: A elements, onNext: A elements, onCompleted: errors, onNext: test errors, onNext: test errors, onCompleted:
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