[WIP] DI containerの設定 #138
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added 2 commits
June 5, 2018 22:23
k-kohey
reviewed
Mar 17, 2019
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| @UIApplicationMain | ||
| class AppDelegate: UIResponder, UIApplicationDelegate { | ||
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| var window: UIWindow? | ||
| lazy var applicationCoordinator = ApplicationCoordinator(window: self.window!) | ||
| lazy var coordinator = DependencyManager.getResolver().resolve(ApplicationCoordinator.self)! |
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CoordinatorをDIするメリットがあまり思いつかなかったんだが，どういったメリットが有るんだろうか．
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| @IBOutlet weak var signInButton: UIBarButtonItem! | ||
| @IBOutlet weak var signUpButton: UIBarButtonItem! | ||
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| override func viewDidLoad() { | ||
| super.viewDidLoad() | ||
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| print(viewModel) |
| setUpDataBinding() | ||
| } | ||
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| private func setUpDataBinding() { | ||
| signInButton.rx.tap | ||
| .subscribe({ _ in self.viewModel?.onSignInClicked() }) | ||
| .subscribe({ _ in self.viewModel.onSignInClicked() }) |
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循環参照を起こします．
下記のように変更することを推奨します．
.subscribe({ [weak self] _ in self?.viewModel.onSignInClicked() })
| import SwinjectStoryboard | ||
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| class DependencyManager { | ||
| static let assembler = Assembler([ |
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カプセル化を試みているなら，ここはprivateの方がいいかもしれないです．
また，この使用方法ならclassじゃなくてenumでも良いかも．
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また，この実装だとどこからでもDI出来てしまうが，それが実装意図に沿っているかも併せて気になりました．
| @@ -9,13 +9,16 @@ | |||
| import Foundation | |||
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| class WelcomeViewModel { | |||
| var coordinator: WelcomeCoordinator? | |||
| let coordinator: WelcomeCoordinator | |||
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CoordinatorがWelcomeViewControllerへの参照を持っていれば，循環参照が起きてそうだと思ったんだが，どうだろうか．
coordinatorはaqppDelegateに保持されているので，解放されることは無さそう．なので
private unowned let coordinator: WelcomeCoordinator
が良さそう．
一方で，ViewModelがCoordinatorを直接持つ必要も無さそうなので，外部から遷移ロジックを注入するのが一番安全かも．
| class ViewControllerAssembly: Assembly { | ||
| func assemble(container: Container) { | ||
| container.storyboardInitCompleted(WelcomeViewConstoller.self) { res, viewController in | ||
| viewController.viewModel = res.resolve(WelcomeViewModel.self)! |
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抽象に依存してないが，これは実装意図に沿っているだろうか．
また，ここでランタイムエラーが起きないかも併せて気になりました．
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close #130
なぜか動きません。