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5෼ͰReactiveCocoa TechLT๨೥ձ2015

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

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“2015೥΋ٕज़తʹมԽͷଟ͍1೥Ͱͨ͠Ͷ” Πϕϯτ֓ཁΑΓ

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ٕज़ؔ܎ͳ͍Ͱ͕͢ɼCyberAgentͷϩΰ΋มԽ͞Ε·ͨ͠ɻ

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

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

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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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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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ReactiveCocoaͷλΠϜ

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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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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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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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No content

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water pipe event pipe

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event signal observe sink

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event signal observe sink let (signal, sink) = Signal.pipe() signal
 .observe { event in // hi } sink.sendNext("hi")

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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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event signal observe sink observe observe͢ΔલͷeventΛड͚औΕͳ͍

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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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event signal observe sink transform

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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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event observe sink

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

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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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• 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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Signal, TransformΛ૊Έ߹Θͤͯɼ
 ผͷSignalΛߏ੒Ͱ͖Δ

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

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observe ෳ਺SignalΛ૊Έ߹ΘͤΔ

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͜Ε΋Ͱ͖ΔΑʂ

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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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Ͳͷͱ͜Ζʹ࢖͑Δ?

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

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͝ࢹௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ