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ೖ
ReactiveSwift
XFE
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͘͡
•ൃදͷಈػ
•λʔήοτͱ࠷ऴඪ
•ReactiveSwift ͷ֓ཁ
•Signal / SignalProducer
•Property / MutableProperty
•όΠϯσΟϯάԋࢉࢠ
•Action
•·ͱΊ
2
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ڥ
3
߲ όʔδϣϯ
Xcode 10.0.0
Swift 4.2
Result 4.0.0
ReactiveSwift 4.0.0
ReactiveCocoa 8.0.2
RxSwift 4.3.1
RxCocoa 4.3.1
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ൃදͷಈػ
4
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ൃදͷಈػ
• RxSwiftΛ1͘Β͍ͬͯͨ
• ͍͜ͳ͖͕ͤͯͨͦΕͱಉ࣌ʹෆຬग़͖ͯͨ
• ReactiveSwiftͷ͜ͱ͕ؾʹͳ͖ͬͯͨ
• ReactiveSwiftͬͯΈͨΒͱͯศརͩͬͨ
• ࠓ·Ͱແ݅ʹ RxSwift ΛબΜͰ͍͕ͨͬͱ৭ʑࢼ͖ͩͬ͢
ͨ
• ಉ͡Α͏ͳਓ͕͍Δ͔͠Εͳ͍͠ຊޠͷใগͳ͍ͷͰൃද͠
Α͏
5
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ൃදͷಈػ
• RxSwiftΛ1͘Β͍ͬͯͨ
• ͍͜ͳ͖͕ͤͯͨͦΕͱಉ࣌ʹෆຬग़͖ͯͨ
• ReactiveSwiftͷ͜ͱ͕ؾʹͳ͖ͬͯͨ
• ReactiveSwiftͬͯΈͨΒͱͯศརͩͬͨ
• ࠓ·Ͱແ݅ʹ RxSwift ΛબΜͰ͍͕ͨͬͱ৭ʑࢼ͖ͩͬ͢
ͨ
• ಉ͡Α͏ͳਓ͕͍Δ͔͠Εͳ͍͠ຊޠͷใগͳ͍ͷͰൃද͠
Α͏
6
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ൃදͷಈػ
• RxSwiftΛ1͘Β͍ͬͯͨ
• ͍͜ͳ͖͕ͤͯͨͦΕͱಉ࣌ʹෆຬग़͖ͯͨ
• ReactiveSwiftͷ͜ͱ͕ؾʹͳ͖ͬͯͨ
• ReactiveSwiftͬͯΈͨΒͱͯศརͩͬͨ
• ࠓ·Ͱແ݅ʹ RxSwift ΛબΜͰ͍͕ͨͬͱ৭ʑࢼ͖ͩͬ͢
ͨ
• ಉ͡Α͏ͳਓ͕͍Δ͔͠Εͳ͍͠ຊޠͷใগͳ͍ͷͰൃද͠
Α͏
7
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ൃදͷಈػ
• RxSwiftΛ1͘Β͍ͬͯͨ
• ͍͜ͳ͖͕ͤͯͨͦΕͱಉ࣌ʹෆຬग़͖ͯͨ
• ReactiveSwiftͷ͜ͱ͕ؾʹͳ͖ͬͯͨ
• ReactiveSwiftͬͯΈͨΒͱͯศརͩͬͨ
• ࠓ·Ͱແ݅ʹ RxSwift ΛબΜͰ͍͕ͨͬͱ৭ʑࢼ͖ͩͬ͢
ͨ
• ಉ͡Α͏ͳਓ͕͍Δ͔͠Εͳ͍͠ຊޠͷใগͳ͍ͷͰൃද͠
Α͏
8
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ൃදͷಈػ
• RxSwiftΛ1͘Β͍ͬͯͨ
• ͍͜ͳ͖͕ͤͯͨͦΕͱಉ࣌ʹෆຬग़͖ͯͨ
• ReactiveSwiftͷ͜ͱ͕ؾʹͳ͖ͬͯͨ
• ReactiveSwiftͬͯΈͨΒͱͯศརͩͬͨ
• ࠓ·Ͱແ݅ʹ RxSwift ΛબΜͰ͍͕ͨͬͱ৭ʑࢼ͖ͩͬ͢
ͨ
• ಉ͡Α͏ͳਓ͕͍Δ͔͠Εͳ͍͠ຊޠͷใগͳ͍ͷͰൃද͠
Α͏
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ൃදͷಈػ
• RxSwiftΛ1͘Β͍ͬͯͨ
• ͍͜ͳ͖͕ͤͯͨͦΕͱಉ࣌ʹෆຬग़͖ͯͨ
• ReactiveSwiftͷ͜ͱ͕ؾʹͳ͖ͬͯͨ
• ReactiveSwiftͬͯΈͨΒͱͯศརͩͬͨ
• ࠓ·Ͱແ݅ʹ RxSwift ΛબΜͰ͍͕ͨͬͱ৭ʑࢼ͖ͩͬ͢
ͨ
• ಉ͡Α͏ͳਓ͕͍Δ͔͠Εͳ͍͠ຊޠͷใগͳ͍ͷͰൃද͠
Α͏
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λʔήοτͱ࠷ऴඪ
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λʔήοτ
• RxSwift
• ಛʹཧ༝ͳ͍͚Ͳ RxSwift ͔ͬͨ͜͠ͱͳ͍
• RxSwift Α͏ߟ͑ͨΒ͍͠ΜͪΌ͏ʁͱࢥͬͯΔ
• ͋Δఔ Rx ͕͔Δਓ
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࠷ऴඪ
Rx ͷϑϨʔϜϫʔΫΛબͿࡍʹ
ReactiveSwift ΛબࢶʹೖΕͯཉ͍͠
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͜ͷൃදͷओࢫͱؔແ͍͜ͱ
• ReactiveExtensions Λ࠾༻͢Δ͔Ͳ͏͔
• ͲΜͳΞʔΩςΫνϟΛ࠾༻͢Δ͔
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ReactiveSwift ͷ֓ཁ
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ߏ
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for PureSwift ReactiveSwift
for Cocoa ReactiveCocoa
Dependency Result
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ߏ
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for PureSwift ReactiveSwift
for Cocoa ReactiveCocoa
Dependency Result
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antitypical/Result
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ґଘϥΠϒϥϦ͋Δͷʁʢ৺ʣ
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Result ศརʂ
୯ମͰ͍͍ͨ͘Β͍༗༻
͔ͩΒେৎ"
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ඪ४ϥΠϒϥϦʹՃ͢Δϓϩϙʔβϧʂ
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ReactiveSwift Λߏ͢Δओͳίϯϙʔωϯτ
• Signal
• SignalProducer
• Property
• MutableProperty
• όΠϯσΟϯάԋࢉࢠ
• Action
22
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ݟ͍ͯ͘
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Signal/SignalProducer
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Signal/SignalProducer ͷ֓ཁ
• RxSwift Ͱ͍͏ `Observable`
• Hot ͳ Observable ͕ Signal
• Cold ͳ Observable ͕ SignalProducer
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Signal
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Signal
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• Hot ͳ Observable
• subscribe ͞ΕΔલ͔Βಈ͍͍ͯΔʢ͓͞Β͍ʣ
• ΤϥʔΛܕύϥϝʔλͱͯ࣋ͭ͠
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ͬͯΈΔ
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let (users, observer) = Signal.pipe()
let userNames: Signal = users.map { $0.name }
userNames.observeValues { userName in
print(userName)
}
observer.send(value: User(id: 123, name: "fenrir"))
observer.sendCompleted()
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ͬͯΈΔ
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let (users, observer) = Signal.pipe()
let userNames: Signal = users.map { $0.name }
userNames.observeValues { userName in
print(userName)
}
observer.send(value: User(id: 123, name: "fenrir"))
observer.sendCompleted()
pipe ϝιουͰ Signal ͱ
ͦͷ Input Λ࡞͢Δ
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ͬͯΈΔ
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let (users, observer) = Signal.pipe()
let userNames: Signal = users.map { $0.name }
userNames.observeValues { userName in
print(userName)
}
observer.send(value: User(id: 123, name: "fenrir"))
observer.sendCompleted()
Signal
ग़ྗ୲
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ͬͯΈΔ
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let (users, observer) = Signal.pipe()
let userNames: Signal = users.map { $0.name }
userNames.observeValues { userName in
print(userName)
}
observer.send(value: User(id: 123, name: "fenrir"))
observer.sendCompleted()
Signal.Observer
ೖྗ୲
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ͬͯΈΔ
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let (users, observer) = Signal.pipe()
let userNames: Signal = users.map { $0.name }
userNames.observeValues { userName in
print(userName)
}
observer.send(value: User(id: 123, name: "fenrir"))
observer.sendCompleted()
map ϝιουͰ User → String ͷ Signal ม
RxSwift ͱҧͬͯ map ͯ͠ Hot(=Signal) ͷ··ʂ
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ͬͯΈΔ
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let (users, observer) = Signal.pipe()
let userNames: Signal = users.map { $0.name }
userNames.observeValues { userName in
print(userName)
}
observer.send(value: User(id: 123, name: "fenrir"))
observer.sendCompleted()
`observe` ܥͷϝιουͰ Signal Λߪಡ͢Δ
RxSwift Ͱ͓ͳ͡Έͷ
disposed(by:) ૬ͷॲཧলུͰ͖Δ
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ͬͯΈΔ
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let (users, observer) = Signal.pipe()
let userNames: Signal = users.map { $0.name }
userNames.observeValues { userName in
print(userName)
}
observer.send(value: User(id: 123, name: "fenrir"))
observer.sendCompleted()
ΠϕϯτΛૹ৴͢Δ
ೖྗͱग़ྗ͕ผͷΦϒδΣΫτʹ͔Ε͍ͯΔͷͰ
Readonly ͳ Signal Λ࡞Γ͍͢
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͓͞Β͍
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“Signal Λ map ͯ͠
Signal ͷ··”
Ͱ͋Δ͜ͱͷԿ͕خ͍͠ʁ
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RxSwift ͩͱ
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let subject = PublishSubject()
let userNames = subject.map { user -> String in
print("map ͨ͠Α☺ (RxSwift)")
return user.name
}
// 2 ճ subscribe ͢Δ
let disposeBag = DisposeBag()
userNames
.subscribe(onNext: { name in
print(name)
})
.disposed(by: disposeBag)
userNames
.subscribe(onNext: { name in
print(name)
})
.disposed(by: disposeBag)
// ΠϕϯτΛૹΔ
subject.onNext(User(id: 123, name: "fenrir"))
subject.onCompleted()
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RxSwift ͩͱ
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let subject = PublishSubject()
let userNames = subject.map { user -> String in
print("map ͨ͠Α☺ (RxSwift)")
return user.name
}
// 2 ճ subscribe ͢Δ
let disposeBag = DisposeBag()
userNames
.subscribe(onNext: { name in
print(name)
})
.disposed(by: disposeBag)
userNames
.subscribe(onNext: { name in
print(name)
})
.disposed(by: disposeBag)
// ΠϕϯτΛૹΔ
subject.onNext(User(id: 123, name: "fenrir"))
subject.onCompleted()
pipe ͷΘΓʹ͏
PublishSubject Hot
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RxSwift ͩͱ
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let subject = PublishSubject()
let userNames = subject.map { user -> String in
print("map ͨ͠Α☺ (RxSwift)")
return user.name
}
// 2 ճ subscribe ͢Δ
let disposeBag = DisposeBag()
userNames
.subscribe(onNext: { name in
print(name)
})
.disposed(by: disposeBag)
userNames
.subscribe(onNext: { name in
print(name)
})
.disposed(by: disposeBag)
// ΠϕϯτΛૹΔ
subject.onNext(User(id: 123, name: "fenrir"))
subject.onCompleted()
map ͢Δͱ cold ʹͳΔ
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RxSwift ͩͱ
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let subject = PublishSubject()
let userNames = subject.map { user -> String in
print("map ͨ͠Α☺ (RxSwift)")
return user.name
}
// 2 ճ subscribe ͢Δ
let disposeBag = DisposeBag()
userNames
.subscribe(onNext: { name in
print(name)
})
.disposed(by: disposeBag)
userNames
.subscribe(onNext: { name in
print(name)
})
.disposed(by: disposeBag)
// ΠϕϯτΛૹΔ
subject.onNext(User(id: 123, name: "fenrir"))
subject.onCompleted()
Կճ map ͞Ε͔͔ͨΔΑ͏
ϩάΛࠐΜͰ͓͘
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RxSwift ͩͱ
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let subject = PublishSubject()
let userNames = subject.map { user -> String in
print("map ͨ͠Α☺ (RxSwift)")
return user.name
}
// 2 ճ subscribe ͢Δ
let disposeBag = DisposeBag()
userNames
.subscribe(onNext: { name in
print(name)
})
.disposed(by: disposeBag)
userNames
.subscribe(onNext: { name in
print(name)
})
.disposed(by: disposeBag)
// ΠϕϯτΛૹΔ
subject.onNext(User(id: 123, name: "fenrir"))
subject.onCompleted()
subscribe ͚ͨͩ͠
Observable ͕ੜ͞ΕΔ
ɾϝϞϦͷແବݣ͍
ɾόάͷݪҼ
ʹͳΓಘΔ
ɹɹɹ
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RxSwift ͩͱ
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let subject = PublishSubject()
let userNames = subject.map { user -> String in
print("map ͨ͠Α☺ (RxSwift)")
return user.name
}
// 2 ճ subscribe ͢Δ
let disposeBag = DisposeBag()
userNames
.subscribe(onNext: { name in
print(name)
})
.disposed(by: disposeBag)
userNames
.subscribe(onNext: { name in
print(name)
})
.disposed(by: disposeBag)
// ΠϕϯτΛૹΔ
subject.onNext(User(id: 123, name: "fenrir"))
subject.onCompleted()
subscribe ͚ͨͩ͠
Observable ͕ੜ͞ΕΔ
ɾϝϞϦͷແବݣ͍
ɾόάͷݪҼ
ʹͳΓಘΔ
ɹɹɹ$࣮ߦ݁Ռ
ʹͬ͜Γͯ͠Δ߹Ͱͳ͍
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RxSwift ͩͱ
• Hot ͔ Cold ͔ਓ͕ؒҙͯ͠औΓѻΘͳ͚ΕͳΒͳ͍
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RxSwift ͩͱ
• Hot ͔ Cold ͔ਓ͕ؒҙͯ͠औΓѻΘͳ͚ΕͳΒͳ͍
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let userNames = subject // Hot
.map { user -> String in // Cold
print("map ͨ͠Α☺ (RxSwift)")
return user.name
}
.share(replay: 1, scope: .forever) // Hot
ཪͰԿΛ͍ͯ͠Δ͔
ཧղ͢Δͷ͍͠%
Cold → Hot ͷมՄೳ͕ͩɾɾɾ
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Ұํ ReactiveSwift
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ReactiveSwiftͩͱ
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let (users, observer) = Signal.pipe()
let userNames: Signal = users.map { user -> String in
print("map ͨ͠Α☺ (ReactiveSwift)")
return user.name
}
// 2 ճ subscribe ͢Δ
userNames.observeValues { userName in
print(userName)
}
userNames.observeValues { userName in
print(userName)
}
// ΠϕϯτΛૹΔ
observer.send(value: User(id: 123, name: "fenrir"))
observer.sendCompleted()
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ReactiveSwiftͩͱ
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let (users, observer) = Signal.pipe()
let userNames: Signal = users.map { user -> String in
print("map ͨ͠Α☺ (ReactiveSwift)")
return user.name
}
// 2 ճ subscribe ͢Δ
userNames.observeValues { userName in
print(userName)
}
userNames.observeValues { userName in
print(userName)
}
// ΠϕϯτΛૹΔ
observer.send(value: User(id: 123, name: "fenrir"))
observer.sendCompleted()
Hot ͳ Observable Ͱ͋Δ
Signal Λ༻ҙ
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ReactiveSwiftͩͱ
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let (users, observer) = Signal.pipe()
let userNames: Signal = users.map { user -> String in
print("map ͨ͠Α☺ (ReactiveSwift)")
return user.name
}
// 2 ճ subscribe ͢Δ
userNames.observeValues { userName in
print(userName)
}
userNames.observeValues { userName in
print(userName)
}
// ΠϕϯτΛૹΔ
observer.send(value: User(id: 123, name: "fenrir"))
observer.sendCompleted()
map ͯ͠ Signal ͳ··ʂ
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ReactiveSwiftͩͱ
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let (users, observer) = Signal.pipe()
let userNames: Signal = users.map { user -> String in
print("map ͨ͠Α☺ (ReactiveSwift)")
return user.name
}
// 2 ճ subscribe ͢Δ
userNames.observeValues { userName in
print(userName)
}
userNames.observeValues { userName in
print(userName)
}
// ΠϕϯτΛૹΔ
observer.send(value: User(id: 123, name: "fenrir"))
observer.sendCompleted()
Կճ subscribe ͯ͠
map 1 ͔࣮͠ߦ͞Εͳ͍
☺
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ReactiveSwiftͩͱ
• Hot ͔ Cold ͔·ͣͱܕΛݟΕ͔Δʂ
• ಄Λ·ͤΔඞཁ͕ͳ͍ʂ
• Hot ΛΦϖϨʔλͰܨ͍Ͱ Hot ͷ··ʂ
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Λগ͠લ·Ͱ͠·͢
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ʢ࠶ܝʣͬͯΈΔ
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let (users, observer) = Signal.pipe()
let userNames: Signal = users.map { $0.name }
userNames.observeValues { userName in
print(userName)
}
observer.send(value: User(id: 123, name: "fenrir"))
observer.sendCompleted()
Signal Λߪಡ͢Δ
RxSwift Ͱ͓ͳ͡Έͷ
disposed(by:) ૬ͷॲཧলུͰ͖Δ
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ʢ࠶ܝʣͬͯΈΔ
52
let (users, observer) = Signal.pipe()
let userNames: Signal = users.map { $0.name }
userNames.observeValues { userName in
print(userName)
}
observer.send(value: User(id: 123, name: "fenrir"))
observer.sendCompleted()
Signal Λߪಡ͢Δ
RxSwift Ͱ͓ͳ͡Έͷ
disposed(by:) ૬ͷॲཧলུͰ͖Δ
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໌ࣔతʹ dispose ͠ͳ͍͍ͯ͘ʁ
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͏Μ
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55
͏Μ
ʢ·͋ঢ়گʹΑΔ͚Ͳʣ
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interrupted Πϕϯτൃੜ࣌ʹ
dispose ͞ΕΔ
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interrupted ʹΑΔ dispose
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var (users, observer) = Signal.pipe()
let userNames: Signal = users.map { $0.name }
userNames.observeValues { userName in
print(userName)
}
observer.send(value: User(id: 123, name: "fenrir"))
// ݩʑͷΠϯελϯεΛഁغ͢Δ
(users, observer) = Signal.pipe()
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interrupted ʹΑΔ dispose
58
var (users, observer) = Signal.pipe()
let userNames: Signal = users.map { $0.name }
userNames.observeValues { userName in
print(userName)
}
observer.send(value: User(id: 123, name: "fenrir"))
// ݩʑͷΠϯελϯεΛഁغ͢Δ
(users, observer) = Signal.pipe()
Կ͔͠ΒͷݪҼͰ
Signal ͷΠϯελϯε͕
ղ์͞ΕΔͱɾɾɾ
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interrupted ʹΑΔ dispose
59
var (users, observer) = Signal.pipe()
let userNames: Signal = users.map { $0.name }
userNames.observeValues { userName in
print(userName)
}
observer.send(value: User(id: 123, name: "fenrir"))
// ݩʑͷΠϯελϯεΛഁغ͢Δ
(users, observer) = Signal.pipe()
Signal ͔Β `interrupted` Πϕϯτ͕ୡ͞ΕΔ
`completed` or `failed` ͢Δલʹ
ऴΘͬͪΌͬͨΑͱ͍͏ҙຯ
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Signal.Event
60
public enum Event {
case value(Value)
case failed(Error)
case completed
case interrupted
}
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Signal.Event
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public enum Event {
case value(Value)
case failed(Error)
case completed
case interrupted
}
ΛૹΔΠϕϯτ
RxSwift Ͱ next
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Signal.Event
62
public enum Event {
case value(Value)
case failed(Error)
case completed
case interrupted
}
ࣦഊΛૹΔΠϕϯτ
RxSwift Ͱ error
ड͚औΔͱdispose͞ΕΔ
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Signal.Event
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public enum Event {
case value(Value)
case failed(Error)
case completed
case interrupted
}
ྃΛૹΔΠϕϯτ
RxSwift Ͱ completed
ड͚औΔͱdispose͞ΕΔ
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Signal.Event
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public enum Event {
case value(Value)
case failed(Error)
case completed
case interrupted
}
ߪಡ͕Ωϟϯηϧ͞Εͨ͜ͱ
ΛૹΔΠϕϯτ
ड͚औΔͱdispose͞ΕΔ
RxSwift ʹͳ͍
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interrupted ʹΑΔ dispose
• `interrupted` ͕ى͜Δͱࣗಈతʹ dispose ͞ΕΔ
• ͜ΕʹΑΓ RxSwift ͷ disposed(by:) ૬ͷॲཧ͕
লུͰ͖Δʂ
• RxSwift ͷ “DisposeBag Λఆٛͯ͠ disposed(by:) ͠
ͯ…” ͱ͍͏͍ͭॻ͘ΞϨ͕ແ͘ͳΔ
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खಈͰ dispose Ͱ͖ΔΑ
66
// ͖ͬ͞·ͰӅΕͯͨ
let disposable = userNames.observeValues { userName in
print(userName)
}
• खಈͰ dispose Ͱ͖Δ
• subscribe ܥͷϝιουͷฦΓ͕ RxSwift ͱಉ༷
Disposable
• @discardableResult ʹͳ͍ͬͯΔͷͰීஈ͋·Γ
ҙࣝ͠ͳ͍
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SignalProducer
67
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SignalProducer
68
• Cold ͳ Observable
• subscribe ͞Ε͔ͯΒಈ͘ʢ͓͞Β͍ʣ
• ΤϥʔΛܕύϥϝʔλͱͯ࣋ͭ͠
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69
͍࣋ͬͯΔΠϯλʔϑΣʔε΄΅
Signal ͱಉ͡
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ͬͯΈΔ
70
let request = URLRequest(url: URL(string: "https://example.com/")!)
let session = URLSession.shared
let data: SignalProducer<(Data, URLResponse), AnyError> = session.reactive.data(with: request)
data.startWithResult { result in
switch result {
case .success(let data, let response):
break
case .failure(let error):
print(error)
}
}
`startͳΜͨΒ`ܥͷϝιουΛݺͿ͜ͱͰॳΊͯಈ࡞͢Δ
ྫͰ `startWithResult` ΛݺΜͰ͍Δ
·ͨɺSignal ಉ༷ dispose ͷॲཧলུͰ͖Δ
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RxSwift ͱൺֱͭͭ͠SignalProducerΛ࡞ͬͯΈΔ
71
// subscribe ͞ΕͨΒಉظతʹ1ͭͷ value ͱ completed Λྲྀ͢
SignalProducer(value: 1) // ReactiveSwift
Observable.just(1) // RxSwift
// subscribe ͞ΕͨΒಉظతʹ error Λྲྀ͢
SignalProducer(error: APIError.network) // ReactiveSwift
Observable.error(APIError.network) // RxSwift
// subscribe ͞ΕͨΒಉظతʹ completed Λྲྀ͢
SignalProducer.empty // ReactiveSwift
Observable.empty() // RxSwift
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RxSwift ͱൺֱͭͭ͠SignalProducerΛ࡞ͬͯΈΔ
72
// subscribe ͞ΕͨΒಉظతʹ1ͭͷ value ͱ completed Λྲྀ͢
SignalProducer(value: 1) // ReactiveSwift
Observable.just(1) // RxSwift
// subscribe ͞ΕͨΒಉظతʹ error Λྲྀ͢
SignalProducer(error: APIError.network) // ReactiveSwift
Observable.error(APIError.network) // RxSwift
// subscribe ͞ΕͨΒಉظతʹ completed Λྲྀ͢
SignalProducer.empty // ReactiveSwift
Observable.empty() // RxSwift
ඇಉظόʔδϣϯ࡞ͬͯΈΔ
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ඇಉظSignalProducer࡞ͬͯΈΔ
73
func fetchUsers(with name: String) -> SignalProducer<[User], APIError> {
return SignalProducer<[User], APIError> { observer, lifetime in
repository.fetchUsers(with: name) { result in
switch result {
case .success(let users):
observer.send(value: users)
observer.sendCompleted()
case .failure(let error):
observer.send(error: error)
}
}
}
}
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ඇಉظSignalProducer࡞ͬͯΈΔ
74
func fetchUsers(with name: String) -> SignalProducer<[User], APIError> {
return SignalProducer<[User], APIError> { observer, lifetime in
repository.fetchUsers(with: name) { result in
switch result {
case .success(let users):
observer.send(value: users)
observer.sendCompleted()
case .failure(let error):
observer.send(error: error)
}
}
}
}
public init(_ startHandler: @escaping (Signal.Observer, Lifetime) -> Void)
ΠχγϟϥΠβͷҾΫϩʔδϟΛ1ͭ
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ඇಉظSignalProducer࡞ͬͯΈΔ
75
func fetchUsers(with name: String) -> SignalProducer<[User], APIError> {
return SignalProducer<[User], APIError> { observer, lifetime in
repository.fetchUsers(with: name) { result in
switch result {
case .success(let users):
observer.send(value: users)
observer.sendCompleted()
case .failure(let error):
observer.send(error: error)
}
}
}
}
`start` ͞ΕΔͱΠχγϟϥΠβʹͨ͠
Ϋϩʔδϟ͕࣮ߦ͞ΕΔ
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ඇಉظSignalProducer࡞ͬͯΈΔ
76
func fetchUsers(with name: String) -> SignalProducer<[User], APIError> {
return SignalProducer<[User], APIError> { observer, lifetime in
repository.fetchUsers(with: name) { result in
switch result {
case .success(let users):
observer.send(value: users)
observer.sendCompleted()
case .failure(let error):
observer.send(error: error)
}
}
}
}
ࣗ࡞Ϋϥεͷࣗ࡞ϝιου
ඇಉظॲཧͳͷͰҾʹ completionHandler ΛऔΔ
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ඇಉظSignalProducer࡞ͬͯΈΔ
77
func fetchUsers(with name: String) -> SignalProducer<[User], APIError> {
return SignalProducer<[User], APIError> { observer, lifetime in
repository.fetchUsers(with: name) { result in
switch result {
case .success(let users):
observer.send(value: users)
observer.sendCompleted()
case .failure(let error):
observer.send(error: error)
}
}
}
}
ඇಉظॲཧ͕ऴΘͬͨΒ࣮ߦ͞ΕΔ
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ඇಉظSignalProducer࡞ͬͯΈΔ
78
func fetchUsers(with name: String) -> SignalProducer<[User], APIError> {
return SignalProducer<[User], APIError> { observer, lifetime in
repository.fetchUsers(with: name) { result in
switch result {
case .success(let users):
observer.send(value: users)
observer.sendCompleted()
case .failure(let error):
observer.send(error: error)
}
}
}
}
݁ՌʹԠͯ͡ Observer ʹΠϕϯτΛૹΔ
ʢ͜ͷล RxSwift ͱͦΜͳʹมΘΒͳ͍Ͱ͢ʣ
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79
ͱ͜ΖͰΤϥʔͷछྨ͕ܕϨϕϧͰΘ͔Δ͜ͱͷ
ͳʹ͕خ͍͠ʁ
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80
Ͳ͏ͤ localizeDescription ͔͠
ΘΜ͠ͳʙ
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81
'
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ΤϥʔλΠϓͷϝϦοτ
• ΤϥʔͷछྨʹԠͯ͡ॲཧΛΓ͚͍ͨͱ͖ͳͲ
→ʮτʔΫϯΕͷ࣌ͷΈ࠶ϩάΠϯॲཧΛཪͰߦ͏ʯͱ͔
Τϥʔͷछྨ͕Θ͔Βͳ͍ͱΩϟετ͠ͳ͚ΕͳΒͳ͍ɻ
࣮ߦ͢Δ·ͰΩϟετ͕ޭ͢Δ͔Ͳ͏͔͔Βͳ͍…
• Τϥʔ͕ى͖ͳ͍͜ͱΛදݱͰ͖Δ
→ NoError Λ͏͜ͱͰΤϥʔϋϯυϦϯά͠ͳ͍ͯ͘
͍ʂͱ͍͏͜ͱ͕Θ͔Δɻ
82
Τϥʔʹؔ͢Δॲཧ͕ίϯύΠϧ࣌ʹอূ͞ΕΔʂ
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83
Signal/SignalProducer
͓͞Β͍
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84
RxSwift ͱൺֱ
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ReactiveSwift VS RxSwift
85
ReactiveSwift RxSwift
Hot Signal Observable
Cold
Signal
Producer
Observable
Τϥʔͷܕ ͔Δ ͔ΒΜ
disposeΛলུ Ͱ͖Δ Ͱ͖ͳ͍
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ReactiveSwift VS RxSwift
86
ReactiveSwift RxSwift
Hot Signal Observable
Cold
Signal
Producer
Observable
Τϥʔͷܕ ͔Δ ͔ΒΜ
disposeΛলུ Ͱ͖Δ Ͱ͖ͳ͍
ܕϨϕϧͰ Hot ͔ Cold ͷ۠ผ͕ͭ͘
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ReactiveSwift VS RxSwift
87
ReactiveSwift RxSwift
Hot Signal Observable
Cold
Signal
Producer
Observable
Τϥʔͷܕ ͔Δ ͔ΒΜ
disposeΛলུ Ͱ͖Δ Ͱ͖ͳ͍
ܕϨϕϧͰΤϥʔͷछྨͷ۠ผ͕ͭ͘
`NoError`Λ͑Τϥʔ͕ى͖ͳ͍͜ͱΛදݱͰ͖Δ
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ReactiveSwift VS RxSwift
88
ReactiveSwift RxSwift
Hot Signal Observable
Cold
Signal
Producer
Observable
Τϥʔͷܕ ͔Δ ͔ΒΜ
disposeΛলུ Ͱ͖Δ Ͱ͖ͳ͍
RxSwiftͱൺָͯͰ͖Δ
ϚχϡΞϧ dispose Ͱ͖Δ
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89
Signal ͱ SignalProducer ͱͰൺֱ
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Signal VS SignalProducer
90
Signal SignalProducer
Hot/Cold Hot Cold
ߪಡ։࢝ͷϝιου observeXXX startXXX
ओͳੜํ๏ Signal.pipe() ৭ʑ͋Δ
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Signal VS SignalProducer
91
Signal SignalProducer
Hot/Cold Hot Cold
ߪಡ։࢝ͷϝιου observeXXX startXXX
ओͳੜํ๏ Signal.pipe() ৭ʑ͋Δ
໋໊ͷҧ͍͕྆ऀͷҧ͍ΛࡍཱͨͤͯΔʢͱࢥ͏ʣ
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Signal VS SignalProducer
92
Signal SignalProducer
Hot/Cold Hot Cold
ߪಡ։࢝ͷϝιου observeXXX startXXX
ओͳੜํ๏ Signal.pipe() ৭ʑ͋Δ
ߪಡ։࢝͢Δ͝ͱʹ start ͞ΕΔΜͩͳ͊
ͱײ͡ΒΕΔ໋໊
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Signal/SignalProducer
͓͠·͍
93
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Property/MutableProperty
94
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MutableProperty
95
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MutableProperty
96
• ߪಡՄೳͳΛอ͍࣋ͯ͠Δ
• ͷมߋ Signal / SignalProducer ͔ΒߪಡՄೳ
• ಉظతʹΛऔಘɾઃఆ͢Δ͜ͱͰ͖Δ
• RxSwift Ͱ͍͏ BehaviorRelay(چVariable)
• ໊લ͕Θ͔Γ͍͢
• ReactiveSwift ʹఆٛ͞Ε͍ͯΔʢBehaviorRelay
RxCocoaʹఆٛ͞Ε͍ͯΔʣ
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ͬͯΈΔ
97
let selectedUsers = MutableProperty<[User]>([])
// ͷมߋΛ `Signal` Ͱ subscribe
selectedUsers.signal.observeValues { selectedUsers in
print(selectedUsers)
}
// ͷมߋΛ `SignalProducer` Ͱ subscribe
selectedUsers.producer.startWithValues { selectedUsers in
print(selectedUsers)
}
// ͷมߋͱऔಘ value ͔ΒՄೳ
selectedUsers.value = [
User(id: 123, name: "fenrir")
]
selectedUsers.value.removeAll()
XCTAssert(selectedUsers.value.isEmpty)
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ͬͯΈΔ
98
let selectedUsers = MutableProperty<[User]>([])
// ͷมߋΛ `Signal` Ͱ subscribe
selectedUsers.signal.observeValues { selectedUsers in
print(selectedUsers)
}
// ͷมߋΛ `SignalProducer` Ͱ subscribe
selectedUsers.producer.startWithValues { selectedUsers in
print(selectedUsers)
}
// ͷมߋͱऔಘ value ͔ΒՄೳ
selectedUsers.value = [
User(id: 123, name: "fenrir")
]
selectedUsers.value.removeAll()
XCTAssert(selectedUsers.value.isEmpty)
ॳظԽ
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let selectedUsers = MutableProperty<[User]>([])
// ͷมߋΛ `Signal` Ͱ subscribe
selectedUsers.signal.observeValues { selectedUsers in
print(selectedUsers)
}
// ͷมߋΛ `SignalProducer` Ͱ subscribe
selectedUsers.producer.startWithValues { selectedUsers in
print(selectedUsers)
}
// ͷมߋͱऔಘ value ͔ΒՄೳ
selectedUsers.value = [
User(id: 123, name: "fenrir")
]
selectedUsers.value.removeAll()
XCTAssert(selectedUsers.value.isEmpty)
ͬͯΈΔ
99
ͷมߋΛߪಡͰ͖Δ
ॳظྲྀΕͯ͜ͳ͍
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let selectedUsers = MutableProperty<[User]>([])
// ͷมߋΛ `Signal` Ͱ subscribe
selectedUsers.signal.observeValues { selectedUsers in
print(selectedUsers)
}
// ͷมߋΛ `SignalProducer` Ͱ subscribe
selectedUsers.producer.startWithValues { selectedUsers in
print(selectedUsers)
}
// ͷมߋͱऔಘ value ͔ΒՄೳ
selectedUsers.value = [
User(id: 123, name: "fenrir")
]
selectedUsers.value.removeAll()
XCTAssert(selectedUsers.value.isEmpty)
ͬͯΈΔ
100
ͷมߋΛߪಡͰ͖Δ
ॳظ͕ྲྀΕͯདྷΔ
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let selectedUsers = MutableProperty<[User]>([])
// ͷมߋΛ `Signal` Ͱ subscribe
selectedUsers.signal.observeValues { selectedUsers in
print(selectedUsers)
}
// ͷมߋΛ `SignalProducer` Ͱ subscribe
selectedUsers.producer.startWithValues { selectedUsers in
print(selectedUsers)
}
// ͷมߋͱऔಘ value ͔ΒՄೳ
selectedUsers.value = [
User(id: 123, name: "fenrir")
]
selectedUsers.value.removeAll()
XCTAssert(selectedUsers.value.isEmpty)
ͬͯΈΔ
101
Λಉظతʹ
औಘɾઃఆͰ͖Δ
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Property
102
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Property
103
• ಡΈऔΓઐ༻
• MutableProperty ͱΠϯλʔϑΣʔε΄΅ಉ͡
• RxSwift ʹಉ༷ͷΫϥεଘࡏ͠ͳ͍
• ֎෦ʹެ։͢Δ࣌ʹศར
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ͬͯΈΔ(1)
104
let mutableState = MutableProperty(State.notLoaded)
mutableState.value = .loading
let state = Property(capturing: mutableState)
state.value = .notLoaded
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let mutableState = MutableProperty(State.notLoaded)
mutableState.value = .loading
let state = Property(capturing: mutableState)
state.value = .notLoaded
ͬͯΈΔ(1)
105
લड़ͷ௨ΓMutableProperty
Λߋ৽Ͱ͖Δ
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let mutableState = MutableProperty(State.notLoaded)
mutableState.value = .loading
let state = Property(capturing: mutableState)
state.value = .notLoaded
ͬͯΈΔ(1)
106
mutableProperty Λ Property ʹม
ৗʹݩͱͳͬͨ mutableProperty ͱಉ͡
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let mutableState = MutableProperty(State.notLoaded)
mutableState.value = .loading
let state = Property(capturing: mutableState)
state.value = .notLoaded
ͬͯΈΔ(1)
107
ಡΈऔΓઐ༻ͳͷͰίϯύΠϧΤϥʔ
→Cannot assign to property: 'value' is a get-only property
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ͬͯΈΔ(2)
108
struct ViewModel {
let state: Property
private let mutableState: MutableProperty
init() {
self.mutableState = MutableProperty(.notLoaded)
self.state = Property(capturing: mutableState)
}
}
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struct ViewModel {
let state: Property
private let mutableState: MutableProperty
init() {
self.mutableState = MutableProperty(.notLoaded)
self.state = Property(capturing: mutableState)
}
}
ͬͯΈΔ(2)
109
֎෦ͷެ։ಡΈऔΓઐ༻Ͱ͋Δ
Property Λ༻ҙ
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struct ViewModel {
let state: Property
private let mutableState: MutableProperty
init() {
self.mutableState = MutableProperty(.notLoaded)
self.state = Property(capturing: mutableState)
}
}
ͬͯΈΔ(2)
110
෦Ͱঢ়ଶΛมߋͰ͖ΔΑ͏ʹ
MutablePropertyͰ͓࣋ͬͯ͘
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struct ViewModel {
let state: Property
private let mutableState: MutableProperty
init() {
self.mutableState = MutableProperty(.notLoaded)
self.state = Property(capturing: mutableState)
}
}
ͬͯΈΔ(2)
111
֎෦ʹެ։͢Δ༻ͷ Property
ݩʑ MutableProperty ͳͷͰ
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struct ViewModel {
let state: Property
private let mutableState: MutableProperty
init() {
self.mutableState = MutableProperty(.notLoaded)
self.state = Property(capturing: mutableState)
}
}
ͬͯΈΔ(2)
112
͍ͭ͜Λม͑Δͱ
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struct ViewModel {
let state: Property
private let mutableState: MutableProperty
init() {
self.mutableState = MutableProperty(.notLoaded)
self.state = Property(capturing: mutableState)
}
}
ͬͯΈΔ(2)
113
͍ͭ͜มΘΔ
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ͪΐͬͱ·ͱΊ
• Property ಡΈऔΓઐ༻
• MutableProperty ಡΈॻ͖Մೳ
• ͦΕҎ֎ͷΠϯλʔϑΣʔε΄΅ಉ͡
114
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115
Property/MutableProperty
ͷ map ͕ศར
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116
ʮϢʔβ໊Λ4จࣈҎ্ೖྗ͠ͳ͍ͱ
ొϘλϯ͕ΞΫςΟϒʹͳΒͳ͍ը໘ʯ
ͷ ViewModel
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Property ͷ map ͕ศར
117
struct ViewModel {
let userName: MutableProperty
let isEnabled: Property
init() {
self.userName = MutableProperty("")
self.isEnabled = userName.map { userName in
userName.count >= 4
}
}
}
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Property ͷ map ͕ศར
118
struct ViewModel {
let userName: MutableProperty
let isEnabled: Property
init() {
self.userName = MutableProperty("")
self.isEnabled = userName.map { userName in
userName.count >= 4
}
}
}
ೖྗதͷϢʔβʔ໊
͜͜ʹόΠϯυͯ͠΄͍͠
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Property ͷ map ͕ศར
119
struct ViewModel {
let userName: MutableProperty
let isEnabled: Property
init() {
self.userName = MutableProperty("")
self.isEnabled = userName.map { userName in
userName.count >= 4
}
}
}
Γସ͑ϩδοΫӅṭ͍ͨͨ͠Ί
ಡΈऔΓઐ༻ʹͯ͠Δ
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Property ͷ map ͕ศར
120
struct ViewModel {
let userName: MutableProperty
let isEnabled: Property
init() {
self.userName = MutableProperty("")
self.isEnabled = userName.map { userName in
userName.count >= 4
}
}
}
userNameͷ͕ܾ·Ε
isEnabledͷҰҙʹܾ·Δ
mapϝιουΛ͑ΑΓએݴతʹ͔͚Δ
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121
BehaviorRelayʹ
mapϝιου͋Δ͕ɾɾɾ
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let fenrir = "fenrir"
let array: Array = Array(arrayLiteral: fenrir).map { $0.count }
let property: Property = Property(value: fenrir).map { $0.count }
let mutable: Property = MutableProperty(fenrir).map { $0.count }
let relay: Observable = BehaviorRelay(value: fenrir).map { $0.count }
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let fenrir = "fenrir"
let array: Array = Array(arrayLiteral: fenrir).map { $0.count }
let property: Property = Property(value: fenrir).map { $0.count }
let mutable: Property = MutableProperty(fenrir).map { $0.count }
let relay: Observable = BehaviorRelay(value: fenrir).map { $0.count }
Array ← map ← Array
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let fenrir = "fenrir"
let array: Array = Array(arrayLiteral: fenrir).map { $0.count }
let property: Property = Property(value: fenrir).map { $0.count }
let mutable: Property = MutableProperty(fenrir).map { $0.count }
let relay: Observable = BehaviorRelay(value: fenrir).map { $0.count }
Property ← map ← Property
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let fenrir = "fenrir"
let array: Array = Array(arrayLiteral: fenrir).map { $0.count }
let property: Property = Property(value: fenrir).map { $0.count }
let mutable: Property = MutableProperty(fenrir).map { $0.count }
let relay: Observable = BehaviorRelay(value: fenrir).map { $0.count }
Property ← map ← MutableProperty
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let fenrir = "fenrir"
let array: Array = Array(arrayLiteral: fenrir).map { $0.count }
let property: Property = Property(value: fenrir).map { $0.count }
let mutable: Property = MutableProperty(fenrir).map { $0.count }
let relay: Observable = BehaviorRelay(value: fenrir).map { $0.count }
Property ← map ← MutableProperty
map ޙͷܕ͕ҧ͏͕ಡΈऔΓઐ༻ʹ͍͔ͨ͠Βʁ
͜ΕͰࠔΔ͜ͱ͋Μ·Γແ͍
Ή͠Ζ͋Γ͕͍ͨ
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let fenrir = "fenrir"
let array: Array = Array(arrayLiteral: fenrir).map { $0.count }
let property: Property = Property(value: fenrir).map { $0.count }
let mutable: Property = MutableProperty(fenrir).map { $0.count }
let relay: Observable = BehaviorRelay(value: fenrir).map { $0.count }
Observable ← map ← BehaviorRelay
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let fenrir = "fenrir"
let array: Array = Array(arrayLiteral: fenrir).map { $0.count }
let property: Property = Property(value: fenrir).map { $0.count }
let mutable: Property = MutableProperty(fenrir).map { $0.count }
let relay: Observable = BehaviorRelay(value: fenrir).map { $0.count }
Observable ← map ← BehaviorRelay
map ޙͷܕ͕ObservableʹͳΔ
͜ΕΑ͔͘Βͳ͍
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129
BehaviorRelayʹ
mapϝιου͋Δ͕
Observable ʹͳͬͯ͠·͏
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ͦͷͨΊಉظతʹΛऔΕͳ͍
→ BehaviorRelay.value ʹΞΫηεͰ͖ͳ͍ʂ
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Property/MutableProperty
͓͞Β͍
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132
RxSwift ͱൺֱ
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ReactiveSwift VS RxSwift
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ReactiveSwift RxSwift
ಡΈॻ͖Մೳ MutableProperty BehaviorRelay
ಡΈऔΓઐ༻ Property -
ଐ͢ΔϑϨʔϜϫʔΫ ReactiveSwift RxCocoa
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ReactiveSwift VS RxSwift
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ReactiveSwift RxSwift
ಡΈॻ͖Մೳ MutableProperty BehaviorRelay
ಡΈऔΓઐ༻ Property -
ଐ͢ΔϑϨʔϜϫʔΫ ReactiveSwift RxCocoa
ଘࡏ͠ͳ͍
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135
PropertyͱMutablePropertyͱͰൺֱ
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Property VS MutableProperty
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Property MutableProperty
ಡΈऔΓ ◯ ◯
ॻ͖ࠐΈ × ◯
mapޙͷܕ Property Property
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Property/MutableProperty
͓͠·͍
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<~
όΠϯσΟϯάԋࢉࢠ
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όΠϯσΟϯάԋࢉࢠ(<~)
• ͷόΠϯυʹ͏
• ͪΐͬͱ໘ന͍
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ͬͯΈΔ
140
viewModel.userName <~ textField.reactive.continuousTextValues.map { $0 ?? "" }
registerButton.reactive.isEnabled <~ viewModel.isEnabled
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viewModel.userName <~ textField.reactive.continuousTextValues.map { $0 ?? "" }
registerButton.reactive.isEnabled <~ viewModel.isEnabled
ͬͯΈΔ
141
͍ͭ͜
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viewModel.userName <~ textField.reactive.continuousTextValues.map { $0 ?? "" }
registerButton.reactive.isEnabled <~ viewModel.isEnabled
ͬͯΈΔ
142
ࠨลʹόΠϯυ͞ΕΔଆΛஔ͘
ɾMutableProperty
ɾBindingTarget
ͳͲ
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viewModel.userName <~ textField.reactive.continuousTextValues.map { $0 ?? "" }
registerButton.reactive.isEnabled <~ viewModel.isEnabled
ͬͯΈΔ
143
ӈลʹΛૹΔଆΛஔ͘
ɾSignal/SignalProducer
ɾProperty/MutableProperty
ͳͲ
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viewModel.userName <~ textField.reactive.continuousTextValues.map { $0 ?? "" }
registerButton.reactive.isEnabled <~ viewModel.isEnabled
ͬͯΈΔ
144
ӈล͕ Property/MutableProperty
ͷ߹ݱࡏͷ͕ଈྲྀΕͯ͘Δ
ͷऔΓಀ͕͠Λߟ͑ͳͯ͘ྑ͍
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ͬͯΈΔ
145
// ࣮ӅΕ͍ͯͨ
registerButton.reactive.isEnabled <~ viewModel.isEnabled
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// ࣮ӅΕ͍ͯͨ
let disposable = registerButton.reactive.isEnabled <~ viewModel.isEnabled
ͬͯΈΔ
146
ԋࢉࢠͷ݁Ռ @discardableResult ͳ Disposable
Signal/SignalProducer ͱಉ༷
dispose ͷॲཧΛলུͰ͖Δ
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όΠϯσΟϯάԋࢉࢠ(<~)͓͞Β͍
• ࠨลόΠϯυ͞ΕΔଆ
• ӈลόΠϯυ͢Δଆ
• ฦΓ @discardableResult ͳ Disposable
• dispose লུՄೳ
147
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<~
όΠϯσΟϯάԋࢉࢠ
͓͠·͍
148
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Action
149
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Action
• ໋໊͕ͬ͘͟Γ
• ཧղ͢Δͷʹ͕͔͔࣌ؒΔ
• ඇಉظॲཧͷ࣮ߦΛ੍ޚɾࢹͯ͘͠ΕΔ
• Input Λ༩͑ͯ Output ͘͠ Error Λ͖ͩ͢
150
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Action
• ໋໊͕ͬ͘͟Γ
• ཧղ͢Δͷʹ͕͔͔࣌ؒΔ
• ඇಉظॲཧͷ࣮ߦΛ੍ޚɾࢹͯ͘͠ΕΔ
• Input Λ༩͑ͯ Output ͘͠ Error Λ͖ͩ͢
151
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152
Action
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153
Action
InputΛ༩͑ͯ
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154
Action
Output͘͠
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155
Action
ErrorΛ͖ͩ͢
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156
Ϣʔβʔ໊ͰϢʔβʔҰཡΛ
ඇಉظͰݕࡧ͢Δ Action
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ͬͯΈΔ
157
let action = Action { keyword -> SignalProducer<[User], APIError> in
repository.fetchUsers(name: keyword)
}
Input → String (=Ϣʔβʔ໊)
Output → [User] (=ϢʔβʔҰཡ)
Error → APIError (=Τϥʔ)
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ͬͯΈΔ
158
let action = Action { keyword -> SignalProducer<[User], APIError> in
repository.fetchUsers(name: keyword)
}
ΠχγϟϥΠβͷҾΫϩʔδϟ1ͭ
ʢଞͷύλʔϯ͋Δʣ
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ͬͯΈΔ
159
let action = Action { keyword -> SignalProducer<[User], APIError> in
repository.fetchUsers(name: keyword)
}
(Input) -> SignalProducer
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ͬͯΈΔ
160
let action = Action { keyword -> SignalProducer<[User], APIError> in
repository.fetchUsers(name: keyword)
}
(Input) -> SignalProducer
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ͬͯΈΔ
161
let action = Action { keyword -> SignalProducer<[User], APIError> in
repository.fetchUsers(name: keyword)
}
(Input) -> SignalProducer
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ͬͯΈΔ
162
let action = Action { keyword -> SignalProducer<[User], APIError> in
repository.fetchUsers(name: keyword)
}
(Input) -> SignalProducer
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ͬͯΈΔ
163
let action = Action { keyword -> SignalProducer<[User], APIError> in
repository.fetchUsers(name: keyword)
}
action.apply("fenrir").start()
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ͬͯΈΔ
164
let action = Action { keyword -> SignalProducer<[User], APIError> in
repository.fetchUsers(name: keyword)
}
action.apply("fenrir").start()
apply ϝιουͰ Input(=String) Λ༩͑Δ
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ͬͯΈΔ
165
let action = Action { keyword -> SignalProducer<[User], APIError> in
repository.fetchUsers(name: keyword)
}
action.apply("fenrir").start()
apply → start ͞ΕΔͱ
ΠχγϟϥΠβʹͨ͠Ϋϩʔδϟ͕࣮ߦ͞ΕΔ
͜ͷΫϩʔδϟͷΓͷ SignalProducer ͕
start͞ΕΔ
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ͬͯΈΔ
166
let action = Action { keyword -> SignalProducer<[User], APIError> in
repository.fetchUsers(name: keyword)
}
action.apply("fenrir").start()
action.values.observeValues { (users: [User]) in
print(users)
}
action.errors.observeValues { (error: APIError) in
print(error)
}
Output `values`͔ΒऔಘͰ͖Δ
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ͬͯΈΔ
167
let action = Action { keyword -> SignalProducer<[User], APIError> in
repository.fetchUsers(name: keyword)
}
action.apply("fenrir").start()
action.values.observeValues { (users: [User]) in
print(users)
}
action.errors.observeValues { (error: APIError) in
print(error)
}
Error `errors`͔ΒऔಘͰ͖Δ
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ͬͯΈΔ
168
let action = Action { keyword -> SignalProducer<[User], APIError> in
repository.fetchUsers(name: keyword)
}
action.apply("fenrir").start()
action.values.observeValues { (users: [User]) in
print(users)
}
action.errors.observeValues { (error: APIError) in
print(error)
}
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ͬͯΈΔ
169
let action = Action { keyword -> SignalProducer<[User], APIError> in
repository.fetchUsers(name: keyword)
}
action.apply("fenrir").start()
action.values.observeValues { (users: [User]) in
print(users)
}
action.errors.observeValues { (error: APIError) in
print(error)
}
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ͬͯΈΔ
170
let action = Action { keyword -> SignalProducer<[User], APIError> in
repository.fetchUsers(name: keyword)
}
action.apply("fenrir").start()
action.values.observeValues { (users: [User]) in
print(users)
}
action.errors.observeValues { (error: APIError) in
print(error)
}
activityIndicatorView.reactive.isAnimating <~ action.isExecuting
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ͬͯΈΔ
171
let action = Action { keyword -> SignalProducer<[User], APIError> in
repository.fetchUsers(name: keyword)
}
action.apply("fenrir").start()
action.values.observeValues { (users: [User]) in
print(users)
}
action.errors.observeValues { (error: APIError) in
print(error)
}
activityIndicatorView.reactive.isAnimating <~ action.isExecuting
Property
action ͕࣮ߦ͍ͯ͠ΔؒͷΈ true ʹͳΔ
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ͬͯΈΔ
172
let action = Action { keyword -> SignalProducer<[User], APIError> in
repository.fetchUsers(name: keyword)
}
action.apply("fenrir").start()
action.values.observeValues { (users: [User]) in
print(users)
}
action.errors.observeValues { (error: APIError) in
print(error)
}
activityIndicatorView.reactive.isAnimating <~ action.isExecuting
ΠϯδέʔλͷදࣔΓସ͑ͱόΠϯυ͢Δͱ͖ʹศར
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ͬͯΈΔ
173
let action = Action { keyword -> SignalProducer<[User], APIError> in
repository.fetchUsers(name: keyword)
}
action.apply("fenrir").start()
action.values.observeValues { (users: [User]) in
print(users)
}
action.errors.observeValues { (error: APIError) in
print(error)
}
activityIndicatorView.reactive.isAnimating <~ action.isExecuting
action.apply("fenrir").start()
action.apply("fenrir").start()
action.apply("fenrir").start()
action.apply("fenrir").start()
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ͬͯΈΔ
174
let action = Action { keyword -> SignalProducer<[User], APIError> in
repository.fetchUsers(name: keyword)
}
action.apply("fenrir").start()
action.values.observeValues { (users: [User]) in
print(users)
}
action.errors.observeValues { (error: APIError) in
print(error)
}
activityIndicatorView.reactive.isAnimating <~ action.isExecuting
action.apply("fenrir").start()
action.apply("fenrir").start()
action.apply("fenrir").start()
action.apply("fenrir").start()
Ұʹ࣮ߦͰ͖ΔΞΫγϣϯ1ͭ·Ͱ
͢Ͱʹ࣮ߦதͳΒແࢹ͞ΕΔ
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ͬͯΈΔ
175
let action = Action { keyword -> SignalProducer<[User], APIError> in
repository.fetchUsers(name: keyword)
}
action.apply("fenrir").start()
action.values.observeValues { (users: [User]) in
print(users)
}
action.errors.observeValues { (error: APIError) in
print(error)
}
activityIndicatorView.reactive.isAnimating <~ action.isExecuting
action.apply("fenrir").start()
action.apply("fenrir").start()
action.apply("fenrir").start()
action.apply("fenrir").start()
button.reactive.isEnabled <~ action.isEnabled
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ͬͯΈΔ
176
let action = Action { keyword -> SignalProducer<[User], APIError> in
repository.fetchUsers(name: keyword)
}
action.apply("fenrir").start()
action.values.observeValues { (users: [User]) in
print(users)
}
action.errors.observeValues { (error: APIError) in
print(error)
}
activityIndicatorView.reactive.isAnimating <~ action.isExecuting
action.apply("fenrir").start()
action.apply("fenrir").start()
action.apply("fenrir").start()
action.apply("fenrir").start()
button.reactive.isEnabled <~ action.isEnabled
࣮ߦՄೳ͔Ͳ͏͔ΛόΠϯσΟϯά
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ͬͯΈΔ
177
// start ͢Δ͚ͩͷύλʔϯ
action.apply("fenrir").start()
// start ͯ͠ݸผʹ݁ՌΛϋϯυϦϯά
action.apply("fenrir").startWithResult { result in
switch result {
case .success(let users):
print(users)
case .failure(ActionError.disabled):
print("could not execute")
case .failure(ActionError.producerFailed(let apiError)):
print(apiError)
}
}
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ͬͯΈΔ
178
// start ͢Δ͚ͩͷύλʔϯ
action.apply("fenrir").start()
// start ͯ͠ݸผʹ݁ՌΛϋϯυϦϯά
action.apply("fenrir").startWithResult { result in
switch result {
case .success(let users):
print(users)
case .failure(ActionError.disabled):
print("could not execute")
case .failure(ActionError.producerFailed(let apiError)):
print(apiError)
}
}
ݸผʹϋϯυϦϯά͢Δ͜ͱͰ͖Δ
ݸผʹϋϯυϦϯά͠ͳ͍ύλʔϯ
ݸผʹϋϯυϦϯά͢Δύλʔϯ
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ͬͯΈΔ
179
// start ͢Δ͚ͩͷύλʔϯ
action.apply("fenrir").start()
// start ͯ͠ݸผʹ݁ՌΛϋϯυϦϯά
action.apply("fenrir").startWithResult { result in
switch result {
case .success(let users):
print(users)
case .failure(ActionError.disabled):
print("could not execute")
case .failure(ActionError.producerFailed(let apiError)):
print(apiError)
}
}
࣮ߦͰ͖ͨ
݁Ռޭͩͬͨ
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ͬͯΈΔ
180
// start ͢Δ͚ͩͷύλʔϯ
action.apply("fenrir").start()
// start ͯ͠ݸผʹ݁ՌΛϋϯυϦϯά
action.apply("fenrir").startWithResult { result in
switch result {
case .success(let users):
print(users)
case .failure(ActionError.disabled):
print("could not execute")
case .failure(ActionError.producerFailed(let apiError)):
print(apiError)
}
}
࣮ߦෆՄͷঢ়ଶͩͬͨ
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ͬͯΈΔ
181
// start ͢Δ͚ͩͷύλʔϯ
action.apply("fenrir").start()
// start ͯ͠ݸผʹ݁ՌΛϋϯυϦϯά
action.apply("fenrir").startWithResult { result in
switch result {
case .success(let users):
print(users)
case .failure(ActionError.disabled):
print("could not execute")
case .failure(ActionError.producerFailed(let apiError)):
print(apiError)
}
}
࣮ߦͰ͖ͨ
݁Ռࣦഊͩͬͨ
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ActionͲΜͳ࣌ʹ͑ͦ͏͔
182
1. Ϙλϯλοϓ
2. API ௨৴
3. ௨৴தΠϯδέʔλΛදࣔ
4. ޭ࣌: ը໘ભҠ
ࣦഊ࣌: ΞϥʔτΛදࣔ
5. ͨͩ͠λοϓ࿈ଧͳͲͰ௨৴͕ೋॏʹΒͳ͍Α͏ʹ੍ޚ͢Δ
Α͋͘Δύλʔϯʹ͑ͦ͏ʂ
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ActionԞ͕ਂ͍
• StateΛ༩͑ͨΓ
• StateʹԠ࣮ͯ͡ߦͨ͠Γ͠ͳ͔ͬͨΓ
183
৭ʑͰ͖Δʂ
ৄ͘͠υΩϡϝϯτ or ιʔείʔυಡ͏ʂ
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Action ͓͞Β͍
• ࣮ߦத͔Ͳ͏͔ͷϑϥάΛ Property ͰऔΕΔ
• ࣮ߦՄೳ͔Ͳ͏͔ͷϑϥάΛ Property ͰऔΕΔ
• 1ʹ࣮ߦͰ͖Δඇಉظॲཧ1ͭ·Ͱ
• APIݺͼग़͠ͱ૬ੑ͕͍͍
• ֶशίετߴ͍
184
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Action
͓͠·͍
185
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·ͱΊ
186
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ReactiveSwift·ͱΊ
• ܕϨϕϧͰ Hot/Cold, Error ͷछྨͱ༗ແ͕அͰ͖Δ
ܕʹݫ͍͠ Swift Β͍͠ϓϩάϥϛϯά͕Ͱ͖Δ
• ొ͢ΔΫϥε͕গͳ͍ͷͰγϯϓϧ
187
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ࠓճͤͳ͔ͬͨ͜ͱ
• BindingTarget
• ReactiveCocoaपΓͷ
• RxSwiftͷίϨReactiveSwiftͰ͜͏ॻ͘Αͱ͍͏
• ͬͱ࣮ફతͳ༰
188
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189
࠷ऴඪͳΜ͚ͬʁ
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࠷ऴඪ
Rx ͷϑϨʔϜϫʔΫΛબͿࡍʹ
ReactiveSwift ΛબࢶʹೖΕͯཉ͍͠
190
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191
͝ݕ౼͍ͩ͘͞(