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RxSwift ࠶ೖ
USAMI Kosuke
Fenrir Inc.
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RxSwift ͱ
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RxSwift ͱ
• ඇಉظͷΠϕϯτΛड͚औΔͨΊͷΈ
• UI Πϕϯτड͚औΓ
• Web API Ϩεϙϯεड͚औΓ
• σʔλͷมԽͷࢹ
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ίʔυྫ : UIButton
button.rx.tap
.subscribe { [unowned self] _ in
// Ϙλϯλοϓ࣌ͷॲཧ
}
.disposed(by: disposeBag)
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ίʔυྫ : UITextField
textField.rx.text
.subscribe { [unowned self] _ in
// ςΩετೖྗ࣌ͷॲཧ
}
.disposed(by: disposeBag)
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ίʔυྫ : Notification
NotificationCenter.default.rx.notification(..)
.subscribe { [unowned self] _ in
// ௨ड͚औΓ࣌ͷॲཧ
}
.disposed(by: disposeBag)
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ίʔυྫ : URLSession
session.rx.response(request)
.catchError {
// Τϥʔ࣌ͷॲཧ
.subscribe {
// Ϩεϙϯεड͚औΓ࣌ͷॲཧ
}
.disposed(by: disposeBag)
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ΠϕϯτॲཧͷྲྀΕ
• Observable ʹ Πϕϯτ͕ྲྀΕͯ͘Δ Sequence
• rx.tap, rx.text, rx.notification, rx.response
• Observable Λ subscribe ͢ΔͱΠϕϯτΛड͚औΕΔ
• dispose ʹ subscription ͷഁغ
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ิɿObservable ʹྲྀΕͯ͘Δͷ
• ྲྀΕͯ͘ΔΠϕϯτ enum Ͱఆٛ͞Ε͍ͯΔ
• .next :
• .error : Τϥʔऴྃ
• .completed : ਖ਼ৗऴྃ
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σʔλόΠϯσΟϯά
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σʔλόΠϯσΟϯά
• ྫ͑ɾɾɾ
• ϞσϧͷͷมԽΛ UI ʹ͍͑ͨ
• UI ͷͷมԽΛϞσϧʹ͍͑ͨ
• ͦͷͨΊͷखஈͱͯ͠ RxSwift ͕͑Δ
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σʔλόΠϯσΟϯάͷͨΊͷखஈ
• BehaviorRelay / PublishRelay
• Observable ͷҰछ
• .next ͚͕ͩྲྀΕΔɺऴྃ͠ͳ͍
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Relay ͷ͍ํ : accept
• accept Ͱ Relay ʹ .next ΠϕϯτΛૹΔ͜ͱ͕Ͱ͖Δ
let relay = BehaviorRelay(value: "000")
relay.accept("111")
relay.accept("222")
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Relay ͷ͍ํ : bind
• subscribe ͷΘΓʹ bind ͕͑Δ
relay
.bind(to: label.rx.text)
textField.rx.text
.bind(to: relay)
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BehaviorRelay / PublishRelay
• ྆ऀͷҧ͍
• ॳظΛ࣋ͭ / ࣋ͨͳ͍
• value ϓϩύςΟͰݱࡏ͕औಘͰ͖Δ / Ͱ͖ͳ͍
• subscribe ͨ͠ͱ͖ݱࡏ͕ྲྀΕΔ / ྲྀΕͳ͍
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ViewModel
struct ViewModel {
let username = BehaviorRelay(value: "")
}
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ϞσϧͷͷมԽΛ͑Δ
class ViewController {
override func viewDidLoad() {
viewModel.username
.bind(to: label.rx.text)
.disposed(by: disposeBag)
}
}
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UI ͷͷมԽΛ͑Δ
class ViewController {
override func viewDidLoad() {
textField.rx.text.orEmpty
.bind(to: viewModel.username)
.disposed(by: disposeBag)
}
}
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όΠϯσΟϯάͷ͖
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όΠϯσΟϯά୯ํ
• ʮόΠϯσΟϯάʯͱ͍͏ͱํͬΆ͍͚Ͳɾɾɾ
• RxSwift ͷ߹୯ํ
• bind ࣮ subscribe Ͱ͋Δ͜ͱΛΔͱ͔Γ͢
͍
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ํόΠϯσΟϯάผʹ͍Βͳ͍
• ํͩͱσʔλͷྲྀΕͷ In / Out ͕۠ผͮ͠Β͍
• ΞϓϦઃܭͱͯ͠ɺσʔλͷྲྀΕΔํΛҙࣝͰ͖Δ͜ͱେ
ࣄ
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RxSwift Λ͏͏͑Ͱ
ͷཹҙ
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ͳΜͰͰ͖͗͢Δ
• ڧྗͳπʔϧͷͨΊແઅૢʹ͏ͱ͜Μ͕Β͕Δ͜ͱ͋Δ
• ΞϓϦઃܭΛߟ͓͑ͯ͘
• RxSwift ͕Կ͔ͷΞϓϦઃܭΛ༩͑ͯ͘ΕΔΘ͚Ͱͳ͍
• ΞϓϦઃܭʹରͯ͠ɺ࣮Λָʹ͢Δπʔϧ
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ϥΠϒϥϦࣗମͷن͕େ͖͍
• ༷ʑͳΫϥε͕͋ͬͯѲͮ͠Β͍
• খ͞ͳΛղܾ͍͚ͨͩ͠ͳΒಋೖΛͨΊΒ͏߹
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্खʹ͖߹͑ศར
• ͍Ͳ͜ΖΛͪΌΜͱߟ͑ͯ͑ɺͱͯศར
• Enjoy RxSwift
!