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
Effect の双対、Coeffect
yukikurage
5
1.4k
Gleamという選択肢
comamoca
6
740
Webの外へ飛び出せ NativePHPが切り拓くPHPの未来
takuyakatsusa
2
190
AIエージェントはこう育てる - GitHub Copilot Agentとチームの共進化サイクル
koboriakira
0
210
Perplexity Slack Botを作ってAI活用を進めた話 / AI Engineering Summit プレイベント
n3xem
0
670
git worktree × Claude Code × MCP ~生成AI時代の並列開発フロー~
hisuzuya
0
190
Julia という言語について (FP in Julia « SIDE: F ») for 関数型まつり2025
antimon2
3
970
カクヨムAndroidアプリのリブート
numeroanddev
0
430
Benchmark
sysong
0
230
地方に住むエンジニアの残酷な現実とキャリア論
ichimichi
2
640
社内での開発コミュニティ活動とモジュラーモノリス標準化事例のご紹介/xPalette and Introduction of Modular monolith standardization
m4maruyama
1
130
C++20 射影変換
faithandbrave
0
500
Featured
See All Featured
Stop Working from a Prison Cell
hatefulcrawdad
270
20k
I Don’t Have Time: Getting Over the Fear to Launch Your Podcast
jcasabona
32
2.3k
The Psychology of Web Performance [Beyond Tellerrand 2023]
tammyeverts
48
2.8k
Visualization
eitanlees
146
16k
Sharpening the Axe: The Primacy of Toolmaking
bcantrill
44
2.4k
No one is an island. Learnings from fostering a developers community.
thoeni
21
3.3k
Six Lessons from altMBA
skipperchong
28
3.8k
Practical Orchestrator
shlominoach
188
11k
Docker and Python
trallard
44
3.4k
The Invisible Side of Design
smashingmag
299
51k
Exploring the Power of Turbo Streams & Action Cable | RailsConf2023
kevinliebholz
32
5.9k
Code Review Best Practice
trishagee
68
18k
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