Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Building Fabric.app with ReactiveCocoa
Search
Javier Soto
June 15, 2016
Programming
3
1.2k
Building Fabric.app with ReactiveCocoa
Overview of how the Fabric App was built by taking advantage of some of ReactiveCocoa's features.
Javier Soto
June 15, 2016
Tweet
Share
More Decks by Javier Soto
See All by Javier Soto
try! Swift Tokyo 2018: Optimizing Swift code for separation of concerns and simplicity
javisoto
9
97k
Rubik's Cubes and Genetic Algorithms In Swift
javisoto
1
1k
NSSpain 2016: Building Fabric.app in Swift
javisoto
4
900
Swift User Group - April 2016: Building Fabric.app in Swift
javisoto
4
26k
Swift Summit San Francisco October 2015
javisoto
4
1.4k
iOS Conf Singapore October 2015
javisoto
0
700
NSMeetup San Francisco July 2015
javisoto
3
850
RAC3, A Real World Use Case (aka ReactiveChess)
javisoto
0
600
Back to the Futures
javisoto
4
14k
Other Decks in Programming
See All in Programming
PipeCDのプラグイン化で目指すところ
warashi
1
260
XP, Testing and ninja testing
m_seki
3
230
なぜ「共通化」を考え、失敗を繰り返すのか
rinchoku
1
640
チームのテスト力を総合的に鍛えて品質、スピード、レジリエンスを共立させる/Testing approach that improves quality, speed, and resilience
goyoki
3
420
Railsアプリケーションと パフォーマンスチューニング ー 秒間5万リクエストの モバイルオーダーシステムを支える事例 ー Rubyセミナー 大阪
falcon8823
5
1.1k
猫と暮らす Google Nest Cam生活🐈 / WebRTC with Google Nest Cam
yutailang0119
0
100
童醫院敏捷轉型的實踐經驗
cclai999
0
210
RailsGirls IZUMO スポンサーLT
16bitidol
0
170
「Cursor/Devin全社導入の理想と現実」のその後
saitoryc
0
770
Quand Symfony, ApiPlatform, OpenAI et LangChain s'allient pour exploiter vos PDF : de la théorie à la production…
ahmedbhs123
0
130
Discover Metal 4
rei315
2
120
#kanrk08 / 公開版 PicoRubyとマイコンでの自作トレーニング計測装置を用いたワークアウトの理想と現実
bash0c7
1
690
Featured
See All Featured
The World Runs on Bad Software
bkeepers
PRO
69
11k
Building Adaptive Systems
keathley
43
2.6k
The Art of Programming - Codeland 2020
erikaheidi
54
13k
Design and Strategy: How to Deal with People Who Don’t "Get" Design
morganepeng
130
19k
Writing Fast Ruby
sferik
628
62k
Unsuck your backbone
ammeep
671
58k
The Cult of Friendly URLs
andyhume
79
6.5k
Fight the Zombie Pattern Library - RWD Summit 2016
marcelosomers
233
17k
Reflections from 52 weeks, 52 projects
jeffersonlam
351
20k
A designer walks into a library…
pauljervisheath
207
24k
Code Reviewing Like a Champion
maltzj
524
40k
Templates, Plugins, & Blocks: Oh My! Creating the theme that thinks of everything
marktimemedia
31
2.4k
Transcript
Building Fabric.app with Reac5veCocoa "Building Fabric.app with Reac6veCocoa" - Javier
Soto. RACDC2016 - April 2016 1
Intro @Javi "Building Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016
- April 2016 2
Outline • Intro • History • Contribu.ng to Reac.veCocoa •
Fabric App Architecture • RAC examples from Fabric App "Building Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016 - April 2016 3
Intro: What is Fabric.app? "Building Fabric.app with Reac6veCocoa" - Javier
Soto. RACDC2016 - April 2016 4
What is Fabric.app? "Building Fabric.app with Reac6veCocoa" - Javier Soto.
RACDC2016 - April 2016 5
History h"ps:/ /github.com/blog/1107-reac8vecocoa-for-a-be"er-world "Building Fabric.app with Reac6veCocoa" - Javier Soto.
RACDC2016 - April 2016 6
History • Reac&veCocoa 1: May 2012 (Objec&ve-C) • Reac&veCocoa 2:
September 2013 (Objec&ve-C) • Reac&veCocoa 3: September 2015 (Swi@ 1) • Reac&veCocoa 4: January 2016 (Swi@ 2) "Building Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016 - April 2016 7
"Building Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016 - April
2016 8
Contribu)ng to Reac)veCocoa "Building Fabric.app with Reac6veCocoa" - Javier Soto.
RACDC2016 - April 2016 9
Contribu)ng to Reac)veCocoa: Coding • Refactoring • New tests •
Proposing new operators • Compa5bility with new Swi; versions "Building Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016 - April 2016 10
Contribu)ng to Reac)veCocoa: Other ways! • Replying to issues •
Wri1ng / improving docs • Helping other users • Evangelizing "Building Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016 - April 2016 11
Fabric App Architecture "Building Fabric.app with Reac6veCocoa" - Javier Soto.
RACDC2016 - April 2016 12
Fabric App Architecture • FabricAPI.framework: • Networking • Models •
Fabric App: • View Controllers • View Models "Building Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016 - April 2016 13
Examples of Usage of Reac0veCocoa in the Fabric App "Building
Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016 - April 2016 14
Examples - Networking final class AuthenticatedFabricAPI { func applications() ->
SignalProducer<[Application], FabricAPIError> { return apiNetworking.requestJSONProducer( URL: APIURL(path: "api/v3/projects"), method: .GET ) .attemptMap(Application.decodeObjectsInJSON) .observeOn(UIScheduler()) } } "Building Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016 - April 2016 15
DataLoadState final class MyViewModel { var data: MyEntity? } "Building
Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016 - April 2016 16
DataLoadState enum DataLoadState<DataType> { case Loading case Failed case Loaded(DataType)
} "Building Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016 - April 2016 17
DataLoadState enum DataLoadState<DataType> { case Loading case Failed case Loaded(DataType)
} extension SignalProducerType { func materializeToLoadState() -> SignalProducer<DataLoadState<Value>, NoError> { let producer = self .map(DataLoadState.Loaded) .startWithValue(DataLoadState.Loading) return producer.ignoreErrors(replacementValue: DataLoadState<Value>.Failed) } } "Building Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016 - April 2016 18
extension SignalProducerType where Value: DataLoadState { func ignoreLoadingAndErrorsAfterSuccess() -> SignalProducer<DataLoadState<Value.DataType>,
Error> { var hasSuccededOnce = false return self.filter { value in defer { if value.success { hasSuccededOnce = true } } return !hasSuccededOnce || value.success } } "Building Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016 - April 2016 19
Examples - View Models typealias ApplicationLoadState = DataLoadState<[Application]> final class
ApplicationListViewModel { let applications: AnyProperty<ApplicationLoadState> private let applicationsMutableProperty = MutableProperty(ApplicationLoadState.loading()) init(fabricAPI: AuthenticatedFabricAPI) { self.applications = AnyProperty(self.applicationsMutableProperty) self.applicationsMutableProperty <~ fabricAPI.applications().materializeToLoadState() } } "Building Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016 - April 2016 20
Examples - Consuming Data From a View Model self.viewModel.applications.producer.startWithNext {
applicationsLoadState in switch applicationsLoadState { case .Loading: label.text = "Loading..." case .Failed: label.text = "Error loading applications!" case .Loaded(let applications): reloadTableView(applications: applications) } } "Building Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016 - April 2016 21
Reac%veCocoa Extensions "Building Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016
- April 2016 22
extension SignalProducerType { func startWithValue(value: Value) -> SignalProducer<Value, Error> {
return SignalProducer(value: value).concat(self.producer) } } "Building Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016 - April 2016 23
Reac%veCocoa Extensions extension SignalProducerType { func startWithNil() -> SignalProducer<Value?, Error>
{ return self .map(Optional.init) .startWithValue(nil) } "Building Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016 - April 2016 24
Reac%veCocoa Extensions extension SignalProducerType { func ignoreErrors( replacementValue replacementValue: Self.Value?
= nil ) -> SignalProducer<Value, NoError> { return self.flatMapError { _ in return replacementValue.map(SignalProducer.init) ?? .empty } } "Building Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016 - April 2016 25
Reac%veCocoa Extensions extension SignalProducerType { func failRandomly(withError error: Self.Error) ->
SignalProducer<Value, Error> { return self.attemptMap { value in let shouldFail = arc4random() % 3 == 0 return shouldFail ? Result(error: error) : Result(value: value) } } "Building Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016 - April 2016 26
Reac%veCocoa Extensions extension NSProcessInfo { var lowPowerModelEnabledProducer: SignalProducer<Bool, NoError> {
return NSNotificationCenter.defaultCenter() .rac_notifications(NSProcessInfoPowerStateDidChangeNotification, object: nil) .map { _ in return () } .startWithValue(()) .map { [unowned self] _ in return self.lowPowerModeEnabled } .skipRepeats(==) } } "Building Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016 - April 2016 27
Reac%veCocoa Extensions let shouldReload = combineLatest( viewIsOnScreen, NSProcessInfo.processInfo().lowPowerModelEnabledProducer.map { !$0
} ).map { $0 && $1 } let reloadPeriodically = shouldReload .flatMap(.Latest) { [unowned self] shouldReload in return shouldReload ? timer(30, onScheduler: scheduler).map { _ in () } : .empty } let request = reloadPeriodically.flatMap(.Latest) { someAPIRequest } "Building Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016 - April 2016 28
Reac%veCocoa Extensions extension SignalProducerType { func continueWhenApplicationIsBackgrounded( taskName taskName: String,
timeoutError: Self.Error ) -> SignalProducer<Value, Error> { } "Building Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016 - April 2016 29
Reac%veCocoa Extensions extension SignalProducerType { func repeatWith( producer: SignalProducer<(), NoError>,
throttleWithInterval: NSTimeInterval, onScheduler scheduler: DateSchedulerType ) -> SignalProducer<Value, Error> { return SignalProducer(value: ()).concat(producer) .throttle(throttleWithInterval, onScheduler: scheduler) .promoteErrors(Error) .flatMap(.Concat) { _ in return self.producer } } } "Building Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016 - April 2016 30
Reac%veCocoa Extensions self.api.request(parameterFoo: bar) .repeatWith( viewWillAppearProducer, throttleWithInterval: 60, onScheduler: QueueScheduler.mainQueueScheduler
) "Building Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016 - April 2016 31
Conclusion "Building Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016 -
April 2016 32
Ques%ons? "Building Fabric.app with Reac6veCocoa" - Javier Soto. RACDC2016 -
April 2016 33
Thank you! <3 ! See you next year! "Building Fabric.app
with Reac6veCocoa" - Javier Soto. RACDC2016 - April 2016 34