イマイチなsubscribeをRxぽくする

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1. © and factory,inc. All Rights Reserved. ΠϚΠνͳsubscribeΛ RxΆ͘͢Δ 2019/12/24 ͋Δ͋ΔLT Vol.9
2. © and factory,inc. All Rights Reserved. ͋Δ͋ΔLT Vol.9 | ΠϚΠνͳsubscribeΛRxΆ͘͢Δ Yaruki00 @Yaruki00 @Yaruki_00 ઒ล
   ༟ଠ Yuta Kawabe J04։ൃྺ೥͘Β͍
   ࠷ۙ͸3YΛ࢖ͬͨ.77.͕޷͖
   ΫϦεϚεͰࢥ͍ग़͢͜ͱ͸ಛʹແ͍ BOE
   GBDUPSZגࣜձࣾ
   J04ΤϯδχΞ
3. © and factory,inc. All Rights Reserved. ͋Δ͋ΔLT Vol.9 | ΠϚΠνͳsubscribeΛRxΆ͘͢Δ ݩʹͳͬͨهࣄ ▸ ͍͍Ͷ͍ͩ͘͞ʂ https://qiita.com/Yaruki00/items/3afb8082f6bff0a9fe90
4. © and factory,inc. All Rights Reserved. subscribeʹ ৭ʑॻ͖͕ͪ Rxॳ৺ऀ
5. © and factory,inc. All Rights Reserved. ͋Δ͋ΔLT Vol.9 | ΠϚΠνͳsubscribeΛRxΆ͘͢Δ ΠϚΠνͳsubscribe tableView.rx.itemSelected .subscribe(onNext: { indexPath in let optionalInt = dataSource?[indexPath.row] guard let int = optionalInt else { return } if int > 0 { someObserver.on(.next(int)) } }) .disposed(by: disposeBag)
6. © and factory,inc. All Rights Reserved. ͋Δ͋ΔLT Vol.9 | ΠϚΠνͳsubscribeΛRxΆ͘͢Δ ΠϚΠνͳsubscribe tableView.rx.itemSelected .subscribe(onNext: { indexPath in let optionalInt = dataSource?[indexPath.row] guard let int = optionalInt else { return } if int > 0 { someObserver.on(.next(int)) } }) .disposed(by: disposeBag) σʔλͷม׵
7. © and factory,inc. All Rights Reserved. ͋Δ͋ΔLT Vol.9 | ΠϚΠνͳsubscribeΛRxΆ͘͢Δ ΠϚΠνͳsubscribe tableView.rx.itemSelected .subscribe(onNext: { indexPath in let optionalInt = dataSource?[indexPath.row] guard let int = optionalInt else { return } if int > 0 { someObserver.on(.next(int)) } }) .disposed(by: disposeBag) Φϓγϣφϧͷ Ξϯϥοϓ
8. © and factory,inc. All Rights Reserved. ͋Δ͋ΔLT Vol.9 | ΠϚΠνͳsubscribeΛRxΆ͘͢Δ ΠϚΠνͳsubscribe tableView.rx.itemSelected .subscribe(onNext: { indexPath in let optionalInt = dataSource?[indexPath.row] guard let int = optionalInt else { return } if int > 0 { someObserver.on(.next(int)) } }) .disposed(by: disposeBag) ϑΟϧλϦϯά
9. © and factory,inc. All Rights Reserved. ͋Δ͋ΔLT Vol.9 | ΠϚΠνͳsubscribeΛRxΆ͘͢Δ ΠϚΠνͳsubscribe tableView.rx.itemSelected .subscribe(onNext: { indexPath in let optionalInt = dataSource?[indexPath.row] guard let int = optionalInt else { return } if int > 0 { someObserver.on(.next(int)) } }) .disposed(by: disposeBag) Φϒβʔόʔʹ ΤϨϝϯτΛૹΔ
10. © and factory,inc. All Rights Reserved. ͋Δ͋ΔLT Vol.9 | ΠϚΠνͳsubscribeΛRxΆ͘͢Δ ΠϚΠνͳsubscribe tableView.rx.itemSelected .subscribe(onNext: { indexPath in let optionalInt = dataSource?[indexPath.row] guard let int = optionalInt else { return } if int > 0 { someObserver.on(.next(int)) } }) .disposed(by: disposeBag)
11. © and factory,inc. All Rights Reserved. ॻ͖׵͑ͯ ͍͖·͢
12. © and factory,inc. All Rights Reserved. ͋Δ͋ΔLT Vol.9 | ΠϚΠνͳsubscribeΛRxΆ͘͢Δ σʔλͷม׵ tableView.rx.itemSelected .subscribe(onNext: { indexPath in let optionalInt = dataSource?[indexPath.row] guard let int = optionalInt else { return } if int > 0 { someObserver.on(.next(int)) } }) .disposed(by: disposeBag) σʔλͷม׵
13. © and factory,inc. All Rights Reserved. ͋Δ͋ΔLT Vol.9 | ΠϚΠνͳsubscribeΛRxΆ͘͢Δ σʔλͷม׵ let optionalInt = dataSource?[indexPath.row] .map { dataSource?[$0.row] } func map<Result>(_ transform: @escaping (Self.Element) throws -> Result) -> RxSwift.Observable<Result> લ ޙ
14. © and factory,inc. All Rights Reserved. ͋Δ͋ΔLT Vol.9 | ΠϚΠνͳsubscribeΛRxΆ͘͢Δ ΦϓγϣφϧͷΞϯϥοϓ tableView.rx.itemSelected .subscribe(onNext: { indexPath in let optionalInt = dataSource?[indexPath.row] guard let int = optionalInt else { return } if int > 0 { someObserver.on(.next(int)) } }) .disposed(by: disposeBag) Φϓγϣφϧͷ Ξϯϥοϓ
15. © and factory,inc. All Rights Reserved. ͋Δ͋ΔLT Vol.9 | ΠϚΠνͳsubscribeΛRxΆ͘͢Δ ΦϓγϣφϧͷΞϯϥοϓ guard let int = optionalInt else { return } .flatMap { $0.flatMap(Observable.just) ?? .empty() } func flatMap<Source>(_ selector: @escaping (Self.Element) throws -> Source) -> RxSwift.Observable<Source.Element> where Source : RxSwift.ObservableConvertibleType લ ޙ
16. © and factory,inc. All Rights Reserved. ͋Δ͋ΔLT Vol.9 | ΠϚΠνͳsubscribeΛRxΆ͘͢Δ ϑΟϧλϦϯά tableView.rx.itemSelected .subscribe(onNext: { indexPath in let optionalInt = dataSource?[indexPath.row] guard let int = optionalInt else { return } if int > 0 { someObserver.on(.next(int)) } }) .disposed(by: disposeBag) ϑΟϧλϦϯά
17. © and factory,inc. All Rights Reserved. ͋Δ͋ΔLT Vol.9 | ΠϚΠνͳsubscribeΛRxΆ͘͢Δ ϑΟϧλϦϯά if int > 0 { … } .filter { $0 > 0 } func filter(_ predicate: @escaping (Self.Element) throws -> Bool) -> RxSwift.Observable<Self.Element> લ ޙ
18. © and factory,inc. All Rights Reserved. ͋Δ͋ΔLT Vol.9 | ΠϚΠνͳsubscribeΛRxΆ͘͢Δ ΦϒβʔόʔʹΤϨϝϯτΛૹΔ tableView.rx.itemSelected .subscribe(onNext: { indexPath in let optionalInt = dataSource?[indexPath.row] guard let int = optionalInt else { return } if int > 0 { someObserver.on(.next(int)) } }) .disposed(by: disposeBag) Φϒβʔόʔʹ ΤϨϝϯτΛૹΔ
19. © and factory,inc. All Rights Reserved. ͋Δ͋ΔLT Vol.9 | ΠϚΠνͳsubscribeΛRxΆ͘͢Δ ΦϒβʔόʔʹΤϨϝϯτΛૹΔ someObserver.on(.next(int)) .bind(to: someObserver) func bind<Observer>(to observers: Observer...) -> RxSwift.Disposable where Observer : RxSwift.ObserverType, Self.Element == Observer.Element લ ޙ
20. © and factory,inc. All Rights Reserved. ͋Δ͋ΔLT Vol.9 | ΠϚΠνͳsubscribeΛRxΆ͘͢Δ Ξϑλʔ tableView.rx.itemSelected .map { dataSource?[$0.row] } .flatMap { $0.flatMap(Observable.just) ?? .empty() } .filter { $0 > 0 } .bind(to: someObserver) .disposed(by: disposeBag)
21. © and factory,inc. All Rights Reserved. ͋Δ͋ΔLT Vol.9 | ΠϚΠνͳsubscribeΛRxΆ͘͢Δ Ξϑλʔ tableView.rx.itemSelected .map { dataSource?[$0.row] } .flatMap { $0.flatMap(Observable.just) ?? .empty() } .filter { $0 > 0 } .bind(to: someObserver) .disposed(by: disposeBag) σʔλͷม׵
22. © and factory,inc. All Rights Reserved. ͋Δ͋ΔLT Vol.9 | ΠϚΠνͳsubscribeΛRxΆ͘͢Δ Ξϑλʔ tableView.rx.itemSelected .map { dataSource?[$0.row] } .flatMap { $0.flatMap(Observable.just) ?? .empty() } .filter { $0 > 0 } .bind(to: someObserver) .disposed(by: disposeBag) Φϓγϣφϧͷ Ξϯϥοϓ
23. © and factory,inc. All Rights Reserved. ͋Δ͋ΔLT Vol.9 | ΠϚΠνͳsubscribeΛRxΆ͘͢Δ Ξϑλʔ tableView.rx.itemSelected .map { dataSource?[$0.row] } .flatMap { $0.flatMap(Observable.just) ?? .empty() } .filter { $0 > 0 } .bind(to: someObserver) .disposed(by: disposeBag) ϑΟϧλϦϯά
24. © and factory,inc. All Rights Reserved. ͋Δ͋ΔLT Vol.9 | ΠϚΠνͳsubscribeΛRxΆ͘͢Δ Ξϑλʔ tableView.rx.itemSelected .map { dataSource?[$0.row] } .flatMap { $0.flatMap(Observable.just) ?? .empty() } .filter { $0 > 0 } .bind(to: someObserver) .disposed(by: disposeBag) ϦϨʔʹ ΤϨϝϯτΛૹΔ
25. © and factory,inc. All Rights Reserved. ͋Δ͋ΔLT Vol.9 | ΠϚΠνͳsubscribeΛRxΆ͘͢Δ ϏϑΥΞ&Ξϑλʔ tableView.rx.itemSelected .map { dataSource?[$0.row] } .flatMap { $0.flatMap(Observable.just) ?? .empty() } .filter { $0 > 0 } .bind(to: someObserver) .disposed(by: disposeBag) tableView.rx.itemSelected .subscribe(onNext: { indexPath in let optionalInt = dataSource?[indexPath.row] guard let int = optionalInt else { return } if int > 0 { someObserver.on(.next(int)) } }) .disposed(by: disposeBag)
26. © and factory,inc. All Rights Reserved. ͋Δ͋ΔLT Vol.9 | ΠϚΠνͳsubscribeΛRxΆ͘͢Δ ศརͳΦϖϨʔλʔ͸ͨ͘͞Μ͋Δ ▸ http://reactivex.io/documentation/operators.html ▸ merge ▸ distinct ▸ skip, take ▸ zip ▸ observeOn, subscribeOn ▸ ͳͲͳͲ
27. © and factory,inc. All Rights Reserved. ΦϖϨʔλʔΛ ࢖͍͜ͳͯ͠ ָ͍͠RxϥΠϑΛʂ