ReactiveCocoa

Transcript

1. 5෼ͰReactiveCocoa
   TechLT๨೥ձ2015
   

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2. • Le Van Nghia (ΪΞ)
   • @nghialv (twitter: nghialv2607) ΞΧ΢ϯτ
   • CyberAgentʹ৽ଔೖࣾ
   • FRESH!ੜ์ૹ , AmebaΞϓϦ
   

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3. “2015೥΋ٕज़తʹมԽͷଟ͍1೥Ͱͨ͠Ͷ”
   Πϕϯτ֓ཁΑΓ
   

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4. ٕज़ؔ܎ͳ͍Ͱ͕͢ɼCyberAgentͷϩΰ΋มԽ͞Ε·ͨ͠ɻ
   

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5. http://abema.tv
   https://amebafresh.tv
   Coming Soon!
   

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6. • ϓϩδΣΫτϝϯόʔ໿30໊
   • αʔόʔ & Πϯϑϥ x 6
   • Go 1.5.2, Docker 1.9.0, AWS, Microservices, RESTful API (goji)
   • ϑϩϯτ x 6
   • Node.js v4, TypeScript 1.6, React/Flux, SPA + SSR
   • iOS x 4
   • Swift 2.1, ReactiveCocoa, MVVM
   • Android x 4
   • Kotlin, Rx
   • σβΠφʔ x 3
   • Sketch
   • πʔϧ
   • Slack + Hubot(ChatOps), Github Enterprise, CircleCI (Enterprise), Fabric, JIRA Agile, Mackerel…
   

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7. speakerdeck.com/stormcat24/next-fresh-applications-with-amazon-ecs
   ࢁా͞Μ @stormcat24
   

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8. 2015೥ͷiOS։ൃ
   WWDC 2014
   1.0
   - closure, first-class functions
   - type safety and type inference
   - generics
   - tuples and multiple return values
   - seamless access to Objective C, C, C++
   2/2015
   1.2
   - incremental builds
   - faster executables
   - better compiler diagnostics
   - stability improvements
   9/2015
   2.0
   - error handling model
   - guard, defer
   - protocol extension
   - protocol-oriented programming
   - ίϯύΠϧ࣌ؒ
   - ίϯύΠϥͷόά
   AmebaΞϓϦ
   FRESH!ੜ์ૹ
   - ReactiveCocoa
   - MVVMϞσϧ
   1.0ಋೖ
   - ίϯύΠϧ࣌ؒ
   - ֎෦ϥΠϒϥϦͷෆ҆ఆ
   ίʔυ͕ଟ͘ͳͬͨ࣌఺
   - 100% Swift 1.2
   - MVCϞσϧ
   - Future
   - Result
   

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9. 2015೥ͷiOS։ൃ
   12/2015
   Open source
   - source code
   - swift package manager
   - core libraries
   - ports for Linux
   Fall 2016
   3.0
   FRESH!ੜ์ૹ
   - Swift2.0ʹҠಈ
   - ίϯύΠϧ͸΍͘ͳͬͨ
   

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10. ReactiveCocoaͷλΠϜ
    

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11. ReactiveCocoa (RAC) is a Cocoa framework inspired by
    Functional Reactive Programming. It provides APIs for
    composing and transforming streams of values over time.
    

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12. ReactiveCocoa (RAC) is a Cocoa framework inspired by
    Functional Reactive Programming. It provides APIs for
    composing and transforming streams of values over time.
    

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13. ReactiveCocoa (RAC) is a Cocoa framework inspired by
    Functional Reactive Programming. It provides APIs for
    composing and transforming streams of values over time.
    

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15. water pipe
    event pipe
    

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16. event
    signal
    observe
    sink
    

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17. event
    signal
    observe
    sink
    let (signal, sink) = Signal.pipe()
    signal

    .observe { event in
    // hi
    }
    sink.sendNext("hi")
    

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18. event
    signal
    observe
    sink
    observe
    let (signal, sink) = Signal.pipe()
    signal

    .observe { event in
    // hi
    }
    sink.sendNext("hi")
    signal

    .observe { event in
    // hi
    }
    

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19. event
    signal
    observe
    sink
    observe
    observe͢ΔલͷeventΛड͚औΕͳ͍
    

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20. ReactiveCocoa (RAC) is a Cocoa framework inspired by
    Functional Reactive Programming. It provides APIs for
    composing and transforming streams of values over time.
    

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21. event
    signal
    observe
    sink
    transform
    

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22. event
    signal
    observe
    sink
    let (signal, sink) = Signal.pipe()
    signal

    .map { string in string.uppercaseString }
    .observe { event in
    // “HI"
    }
    sink.sendNext("hi")
    transform
    hi HI
    

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23. event
    observe
    sink
    

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24. throttle
    event
    signal
    observe
    sink
    throttle
    let (signal, sink) = Signal.pipe()
    signal
    .throttle(0.5, onScheduler: QueueScheduler())
    .observe { num in
    // 1
    // 4
    }
    sink.sendNext(1)
    sink.sendNext(2)
    sink.sendNext(3)
    // after 0.5 second
    sink.sendNext(4)
    

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25. combinePrevious
    let (signal, sink) = Signal.pipe()
    signal
    .combinePrevious(0)
    .observe { pre, cur in
    // pre = 0, cur = 1
    // pre = 1, cur = 2
    }
    sink.sendNext(1)
    sink.sendNext(2)
    

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26. Transforming
    • map
    • filter
    • reduce
    • collect
    • mapError
    • observeOn
    • ignoreNil
    • timeoutWithError
    • take
    • delay
    • skip
    • takeUntil
    • combinePrevious
    • takeLast
    • throttle
    • promoteErrors
    

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27. ReactiveCocoa (RAC) is a Cocoa framework inspired by
    Functional Reactive Programming. It provides APIs for
    composing and transforming streams of values over time.
    

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28. • compose (A -> B, B -> C) -> A -> C
    f1: A -> B
    f2: B -> C
    f3: C -> D
    f = f1ɾf2ɾf3
    => f: A -> D
    

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29. Signal, TransformΛ૊Έ߹Θͤͯɼ

    ผͷSignalΛߏ੒Ͱ͖Δ
    

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30. event
    signal
    observe
    sink
    transform
    transform
    ࿈ଓͰTransformΛ૊Έ߹ΘͤΔ
    

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31. observe
    ෳ਺SignalΛ૊Έ߹ΘͤΔ
    

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32. ͜Ε΋Ͱ͖ΔΑʂ
    

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33. zip
    let (numbersSignal, numbersSink) = Signal.pipe()
    let (lettersSignal, lettersSink) = Signal.pipe()
    let newSignal = zip(numbersSignal, lettersSignal)
    newSignal
    .observe { event in

    println(event)

    }
    numbersSink.sendNext(1) // nothing printed
    lettersSink.sendNext("A") // prints (1, A)
    numbersSink.sendNext(2) // nothing printed
    lettersSink.sendNext("B") // prints (1, B)
    lettersSink.sendNext("C") // nothing printed
    lettersSink.sendNext("D") // nothing printed
    

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34. Ͳͷͱ͜Ζʹ࢖͑Δ?
    

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35. • શ෦
    • Model
    • ViewModel
    • View
    • Manager
    • Api
    • …
    

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36. ͝ࢹௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ
    

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