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MVVM for iOS
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laiso
March 12, 2014
Technology
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MVVM for iOS
iOSアプリケーションの開発にMVVMアーキテクチャの考えを持ち込んで設計を見直そうという話をしました
laiso
March 12, 2014
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Transcript
MVVM for iOS MVVM for iOS @laiso @laiso 03/12/2014 03/12/2014
potatotips#5(at COOKPAD) potatotips#5(at COOKPAD)
laiso is NOT laiso is NOT ແ৬ ແ৬ http://lai.so/
ΤϯλʔϓϥΠζ ΤϯλʔϓϥΠζObjective-C Objective-C ͷੈքͱ ͷੈքͱ
มߋ͕πϥ͍ มߋ͕πϥ͍iOS iOSΞϓϦέʔ ΞϓϦέʔ γϣϯ γϣϯ Fat & Massive ViewController
God object, Singleton UI testing is very hard
มߋʹཱ͔ͪ͏ มߋʹཱ͔ͪ͏iOS iOSΞϓϦ ΞϓϦ έʔγϣϯ έʔγϣϯ OSΞοϓσʔτʹΑΓΫϥΠΞϯτͷڥ͕ͲΜͲΜߋ ৽͞ΕͯΏ͘ ϢʔβʔαΠυͰಈ͘ͿΜݖݶӨڹ͕େ͖͘มߋʹϦε Ϋ͕͋Δ(࣭ཁٻ͕ߴ͍)
ωΠςΟϒUIͷมߋHTML+JavaScriptͳͲΑΓॏ͘ͳΓ ͕ͪ
ઃܭվળ ઃܭվળ ίʔυΛཧղ͍ͨ͘͢͠͠ ςετΛॻ͖͍ͨ͘͢͠ มߋʹڧ͘ͳΓɺߴʹ։ൃ͍ͨ͠
MVVM MVVM (Model View ViewModel) (Model View ViewModel)
MVVM MVVM Windows / .NET WPF Silverlight JavaScript Framework AngularJS
KnockoutJS
MVC MVC MVVM MVVM
Cocoa vs MVVM Cocoa vs MVVM ϓϥοτϑΥʔϜຖʹMVCͷߟ͑ํҧ͏ (Rails,Cocoa,Smalltalk) Controller !=
ViewController MVVM View == View+ViewController
ViewController ViewController Ϗϡʔͷίϯτϩʔϥʔ ΞϓϦέʔγϣϯ/Ϟδϡʔϧ"ͷ"ίϯτϩʔϥʔͰͳ ͍ ରͷϏϡʔΛอ໋࣋ͯ͠ྩ͢Δ
ViewModel ViewModel View-ModelɻϏϡʔͷͨΊͷϞσϧ σʔλόΠϯσΟϯάͷΈͰσʔλΛϏϡʔͱଓ Ϗϡʔͳ͠ͰΠϯλʔϑΣΠεΛૢ࡞Ͱ͖Δ
MVVM MVVMͷத৺ͱͳΔߟ͑ํ ͷத৺ͱͳΔߟ͑ํ એݴతͳViewςϯϓϨʔτ σʔλόΠϯσΟϯά
Storyboard(IB) Storyboard(IB) એݴతͳViewςϯϓϨʔτ Storyboard != View தΞοϓϧͷಠࣗن֨ͷXMLςΩετϑΝΠϧ Xcode͕GUIσβΠϯπʔϧͱͯ͠ղऍ͢Δɻ ຊϏϡʔΛએݴͯ͠ΠϕϯτΛଓ͢Δ͜ͱ ʮUIύʔπΛը໘ʹදࣔͤ͞ΔͨΊͷπʔϧʯҎ্ͷ
ҙຯ߹͍͕͋Δ
σʔλόΠϯσΟϯά σʔλόΠϯσΟϯά = Co‐ = Co‐ coa coaόΠϯσΟϯά όΠϯσΟϯά? ?
Mac OS X͚ͷσʔλόΠϯσΟϯάػߏ iOSʹདྷͯͳ͍ see "Cocoa Bindings Programming Topics" http://news.mynavi.jp/special/2005/cocoamvc/menu.html
σʔλόΠϯσΟϯά σʔλόΠϯσΟϯά = Re‐ = Re‐ activeCocoa activeCocoa https://github.com/ReactiveCocoa/ReactiveCocoa
ReactiveCocoa ReactiveCocoa Mac/iOSͰϦΞΫςΟϒϓϩάϥϛϯάΛ࣮ݱ͢Δҝͷϥ ΠϒϥϦ ؔܕϓϩάϥϛϯά෩ͷݴޠDSL
ReactiveCocoa ReactiveCocoaͱ ͱGitHub GitHub GitHubࣾͷਓୡΛϝΠϯʹ։ൃ͞Ε͍ͯΔ GitHub͕Windows൛ΞϓϦέʔγϣϯΛ։ൃ͠ग़ͨ͋͠ ͨΓ͔Β׆ൃʹ GitHubʹC#/.NETܥͷ࣮ྗऀ͕͍ΔɻXamarin/Mono ͬͯΔͦ͏ GitHubͷMacΞϓϦReactiveCocoaΛͬͯMVVMΛ࣮
ݱ͍ͯ͠Δ
ReactiveCocoa ReactiveCocoa มߋΛγάφϧͱ͍͏ΦϒδΣΫτͰදݱͰ͖ΔͷͰɺ ViewModelViewͷৄࡉΛΔඞཁ͕ͳ͍ ViewModelΛରʹςετ͕ॻ͚Δ
RVMViewModel RVMViewModel ReactiveCocoa/ReactiveViewModel ಛఆͷγάφϧͷΠϯλʔϑΣΠεΛఆٛͨ͠ϕʔεΫϥ ε ViewModelͰܧঝͯ͠͏
ViewModel ViewModelΛࠐΉ ΛࠐΉ ViewControllerͷॳظԽ࣌ʹ // TipsListViewController - (id)init { //
... self.viewModel = [[TipsListViewModel alloc] init]; return self; }
ViewModel ViewModelΛࠐΉ ΛࠐΉ StoryboardͷγʔέϯεͰInject // TipsListViewController - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{ if ([[segue identifier] isEqualToString:@"showDetail"]) { NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow]; TipsDetailViewController *viewController = segue.destinationViewController; // ભҠઌͷViewModelΛॳظԽͯ͠ฦ͢ viewController.viewModel = [self.viewModel detailViewModelForIndexPath:indexPath]; } }
ViewModel ViewModelͷ୯ମςετ ͷ୯ମςετ it (@"ViewModelͷςετ", ^{ TipsDetailViewModel *viewModel = [[TipsDetailViewModel
alloc] initWithModel:tips] expect(viewModel.title).to.equal(@"MVVM for iOS"); expect(viewModel.subTitle).to.equal(@""); expect(viewModel.author).to.equal(@"laiso"); });
Pros Pros UIͱϩδοΫͷ ςετ͘͢͠ͳΔ ࠶ར༻͘͢͠ͳΔ ϦΞΫςΟϒUIԽͰͷԠੑ্
Cons Cons هड़ྔ͕૿͑Δ ReactiveCocoaͷޠኮΛशಘ͢Δඞཁ͕͋Δ ࣮ݧతͰ࣮ફ͢Δͷ͕͍͠ ϑϨʔϜϫʔΫଆͷڧ੍ྗͳ͍ͷͰͨͩʹͳͬ ͯΠϚΠνͳײ͡ͰऴΘΔՄೳੑ͋Δ UIʹର͢ΔςετΧόʔͰ͖ͳ͍
͜Ε͔Β ͜Ε͔Β 1. ෳͷ։ൃऀ͕͔͔ΘΔΑ͏ͳෳࡶͰنͷେ͖ͳΞϓϦ έʔγϣϯΛ͏·͘։ൃͰ͖ΔΑ͏ʹ͢Δ 2. ςετͰอޢͰ͖ΔൣғΛ૿ͯ͠ϦϑΝΫλϦϯάͰί ʔυͷഊΛ͗ߴʹϦϦʔεͰ͖ΔΑ͏ʹ͢Δ 3. ํ๏ͷಋೖͰͳ͘എܠͷ՝ʹؔ৺Λ࣋ͪࣗͨͪͰ
ߟ͑Δ͜ͱͰվળ͍ͯ͘͠
ࢀߟࢿྉ ࢀߟࢿྉ Code Reuse with MVVM Model-View-ViewModel for iOS |
Teehan+Lax ReactiveCocoa/Documentation/FrameworkOverview.md at master · ReactiveCocoa/ReactiveCocoa GUI Architectures
Functional Reactive Program‐ Functional Reactive Program‐ ming on iOS ming
on iOS https://leanpub.com/iosfrp
Xamarin.iOS Xamarin.iOS C#͚ͷMVVMαϙʔτϥΠϒϥϦ https://github.com/MvvmCross/MvvmCross https://github.com/reactiveui/ReactiveUI
Thank You Thank You