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RxSwiftと愉快な仲間たち / RxSwift with Units
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Mihyaeru
May 20, 2016
Technology
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RxSwiftと愉快な仲間たち / RxSwift with Units
Gotanda.mobile #1 on 2016/05/20
Mihyaeru
May 20, 2016
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Transcript
RxSwiftͱ༇շͳؒͨͪ Gotanda.mobile #1 in Mobile Factory on 2016/05/20 ϛώϟΤϧ@mihyaeru21
͓·͑୭Α • ϛώϟΤϧ @mihyaeru21 • ࠷ۙͷݴޠɿSwift/Kotlin/Perl • ·ͩ·ͩϋϯλʔ • ϞφυΛཧղ͍ͨ͠
RxSwit
Unit
Unit • Driver • Variable • ControlEvent/ControlProperty
Unit • RxCocoa͕ఏڙ͢Δศར͘Μ • ཧͱ͔ͷ୯Ґͱͯ͠ͷUnitʹ͔͚͍ͯΔΒ͍͠ ※RxCocoaʹؚ·ΕΔͱެࣜυΩϡϝϯτʹ͋Δ͚ͲVariableRxSwiftʹؚ·ΕΔ
Driver
Driver • Τϥʔ͕ྲྀΕͳ͍ • observe on ϝΠϯεϨου • share͞ΕΔ •
(ਖ਼֬ʹ shareReplayLatestWhileConnected )
Driver • ϞσϧͱUIͷؒʹೖͬͨΓ • UIͱUIΛܨ͍ͩΓ • ϋʔυΣΞͷυϥΠόιϑτΣΞతͳͱ͜Ζ͔Β ໊͚ΒΕͨ
Driver fetchUser() .map { $0.name } .observeOn(MainScheduler.instance) .bindTo(label.rx_text)
Driver fetchUser() .map { $0.name } .observeOn(MainScheduler.instance) .bindTo(label.rx_text) όοΫάϥϯυͰσʔλΛऔͬͯ͘Δ UIͷߋ৽ϝΠϯεϨουඞਢ
ϥϕϧͷςΩετʹόΠϯυ͢Δ
Driver fetchUser() .map { $0.name } .asDriver(onErrorJustReturn: "") .drive(label.rx_text)
Driver fetchUser() .map { $0.name } .asDriver(onErrorJustReturn: "") .drive(label.rx_text) Driverʹม
ϥϕϧͷςΩετʹόΠϯυ͢Δ
Driver let userName = fetchUser() .map { $0.name } .observeOn(MainScheduler.instance)
userName.bindTo(label.rx_text) userName.bindTo(otherLabel.rx_text)
Driver let userName = fetchUser() .map { $0.name } .observeOn(MainScheduler.instance)
.share() userName.bindTo(label.rx_text) userName.bindTo(otherLabel.rx_text) share()͠ͳ͍ͱ2ճൃՐ͢Δ
Driver let userName = fetchUser() .map { $0.name } .asDriver(onErrorJustReturn:
"") userName.drive(label.rx_text) userName.drive(otherLabel.rx_text)
Driver let userName = fetchUser() .map { $0.name } .asDriver(onErrorJustReturn:
"") userName.drive(label.rx_text) userName.drive(otherLabel.rx_text) share()తͳ͜ͱΛ͍ͯ͠Δ͔ΒൃՐ1ճͷΈ
Driver • ʮͦΕɺObservableͰͰ͖ͯΔ͡ΌΜʯ • ͍
Driver • UIͱܨ͙ҙਤΛ໌֬ʹ͢Δ • ҆શΛߴΊΔ • DriverʹมޙobserveεϨουͷมߋͰ͖ͳ͍ • share()ͯ͘͠ΕΔ
Variable
Variable • Τϥʔ͕ྲྀΕͳ͍ • share͞ΕΔ
Variable • BehaviorSubjectͷWrapper • valueϓϩύςΟΛ௨ͯ͠࠷৽ͷʹΞΫηεͰ͖Δ • valueϓϩύςΟͷೖon(.Next)ͱͯ͠ྲྀΕΔ • ObservableʹͳΔ͚ͲObserverʹͳΒͳ͍ •
Λྲྀͨ͢ΊʹvalueΛඞͣܦ༝͢Δ
Variable let variable = Variable(0) variable .asDriver() .map { "value:
\($0)" } .drive(label.rx_text) variable.value = 99 print("variable.value = \(variable.value)")
Variable let variable = Variable(0) variable .asDriver() .map { "value:
\($0)" } .drive(label.rx_text) variable.value = 99 print("variable.value = \(variable.value)") label.text͕”value: 99”ʹͳΔ VariableΤϥʔΛྲྀ͞ͳ͍͔Β Ҿແ͠൛ͷasDriver()͕͋Δ ಉظతʹΛऔಘͰ͖Δ
ControlEvent ControlProperty
ControlEvent/ControlProperty • Τϥʔ͕ྲྀΕͳ͍ • subscribe on ϝΠϯεϨου • observe on
ϝΠϯεϨου • share͞ΕΔ
ControlEvent/ControlProperty • UIύʔπͷΠϕϯτΛRxͱͭͳ͗ࠐΈ͘͢ • ControlEvent • Observable • ControlProperty •
Observable / Observer • Observer͋Δ
ControlEvent/ControlProperty textField.rx_text .asDriver() .drive(label.rx_text) ControlProperty Observer ControlPropertyΤϥʔΛྲྀ͞ͳ͍͔Β Ҿແ͠൛ͷasDriver()͕͋Δ
ControlEvent/ControlProperty textField.rx_text .bindTo(label.rx_text) ControlPropertyͷΠϕϯτϝΠϯεϨουͰྲྀΕΔ
ControlEvent/ControlProperty button.rx_tap .asDriver() .map { "tapped!" } .drive(textField.rx_text) ControlEventΤϥʔΛྲྀ͞ͳ͍͔Β Ҿແ͠൛ͷasDriver()͕͋Δ
ControlEvent ControlProperty
ControlEvent/ControlProperty • Cocoaͷ͍ΖΜͳͭʹ rx_* ͕ੜ͍͑ͯͯΖ͍Ζศར • https://github.com/ReactiveX/RxSwift/blob/master/ Documentation/API.md
ಥͳ·ͱΊ • ศརػೳͨͪ • Driver • Variable • ControlEvent/ControlProperty •
ͳͯ͘ࢮͳͳ͍͚Ͳ͋Δͱຯʹศར • ຯʹͬͯ͜