Share object instance between objects with Swinject

Question

I am starting to use Swinject in my apps and I want to share an instance of my rootNavigator between presenters(Viper/MVP) or viewControllers(Not Viper). The main problem that I have is that I want to share appRootNavigator in presenters, but I loose the instance of window because when I register a new module swinject generates a new instance of that class (AppRootNavigator). How can I share AppRootNavigator between presenters.

In this part of the code, I try to change the navigator of the presenter, but it never goes into the if.

if let presenter = container.resolve(SignupPresenter.self, argument: self){
     signUpController.presenter = presenter
}

I don't know another way to do that.

This is the rootNavigator:

import Foundation
import UIKit
import Swinject

class AppRootNavigator: RootNavigator {

    internal let container: Container
    fileprivate var window: UIWindow?

    init(container: Container) {
        self.container = container
    }

    fileprivate lazy var storyboards: Storyboard = {
        return Storyboard(container: self.container)
    }()

    func installRootViewController(in window:UIWindow) {
        self.window = window
        currentNavigationController = signupController()
        self.window?.rootViewController = currentNavigationController
    }

    fileprivate func signupController() -> UINavigationController {
        let signUpController  =  storyboards.signup.instantiateInitialViewController() as! SignupController

        if let presenter = container.resolve(SignupPresenter.self, argument: self) {
            signUpController.presenter = presenter
        }
        return UINavigationController.init(rootViewController: signUpController)
    }

Here I register all elements I want to use.

import Swinject
import Alamofire
import RealmSwift

struct SignupContainer: Bundle {
    func create(_ container: Container) {

        container.register(SignupNavigator.self) { c in
            AppRootNavigator.init(container: container) as SignupNavigator
        }

        container.register(SignupInteractor.self) { c in
            SignupInteractorImpl(facebook: c.resolve(FacebookService.self)!,
                                 api: c.resolve(API.self)!,
                                 realm: c.resolve(Realm.self)!,
                                 analytics: c.resolve(Tracker.self)!)
        }

        container.register(SignupPresenter.self) { c, navigator in
            SignupPresenterImpl(navigator: navigator, interactor:c.resolve(SignupInteractor.self)!) as SignupPresenter
        }

        container.registerForStoryboard(SignupController.self) {
            c, controller in
            if var presenter = c.resolve(SignupPresenter.self, argument: c.resolve(SignupNavigator.self)!) {
                controller.presenter  = presenter
                presenter.view        = controller
            }
        }

score 4 · Answer 1 · answered Feb 14 '18 at 10:01

To make your change of navigator in presenter work, you need to explicitly specify the argument type:

if let presenter = container.resolve(SignupPresenter.self, argument: self as SignupNavigator) {
    signUpController.presenter = presenter
}

However, you shouldn't need to do this. All you need is to register your SignupNavigator in .container object scope:

container.register(SignupNavigator.self) { c in                   
    AppRootNavigator.init(container: container) as SignupNavigator
}.inObjectScope(.container)

Share object instance between objects with Swinject

1 Answers1