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
1.1k
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
95k
Rubik's Cubes and Genetic Algorithms In Swift
javisoto
1
980
NSSpain 2016: Building Fabric.app in Swift
javisoto
4
860
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
680
NSMeetup San Francisco July 2015
javisoto
3
830
RAC3, A Real World Use Case (aka ReactiveChess)
javisoto
0
580
Back to the Futures
javisoto
4
14k
Other Decks in Programming
See All in Programming
『GO』アプリ バックエンドサーバのコスト削減
mot_techtalk
0
130
Honoをフロントエンドで使う 3つのやり方
yusukebe
4
2.1k
AWSマネコンに複数のアカウントで入れるようになりました
yuhta28
2
160
『GO』アプリ データ基盤のログ収集システムコスト削減
mot_techtalk
0
110
WebDriver BiDiとは何なのか
yotahada3
1
140
負債になりにくいCSSをデザイナとつくるには?
fsubal
9
2.3k
GitHub Actions × RAGでコードレビューの検証の結果
sho_000
0
240
Writing documentation can be fun with plugin system
okuramasafumi
0
120
密集、ドキュメントのコロケーション with AWS Lambda
satoshi256kbyte
0
170
Java Webフレームワークの現状 / java web framework at burikaigi
kishida
9
2.2k
SwiftUI Viewの責務分離
elmetal
PRO
0
140
最近のVS Codeで気になるニュース 2025/01
74th
1
250
Featured
See All Featured
Visualizing Your Data: Incorporating Mongo into Loggly Infrastructure
mongodb
44
9.4k
実際に使うSQLの書き方 徹底解説 / pgcon21j-tutorial
soudai
175
51k
Bash Introduction
62gerente
610
210k
Building Applications with DynamoDB
mza
93
6.2k
Responsive Adventures: Dirty Tricks From The Dark Corners of Front-End
smashingmag
251
21k
jQuery: Nuts, Bolts and Bling
dougneiner
63
7.6k
We Have a Design System, Now What?
morganepeng
51
7.4k
Code Reviewing Like a Champion
maltzj
521
39k
Optimizing for Happiness
mojombo
376
70k
Testing 201, or: Great Expectations
jmmastey
41
7.2k
Designing Experiences People Love
moore
139
23k
How to Create Impact in a Changing Tech Landscape [PerfNow 2023]
tammyeverts
49
2.3k
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