Hi,

I have been trying to implement the coordinator pattern in my app, and it uses a UITabBarController. One of the tabs is an image picker that would present modally, which I would display like so:

    func tabBarController(_ tabBarController: UITabBarController, shouldSelect viewController: UIViewController) -> Bool {
        if self.viewControllers?.firstIndex(of: viewController) == 1 {
            let imagePicker = UIImagePickerController()
            imagePicker.delegate = self
            self.present(imagePicker, animated: true)
            return false
        }

        return true
    }

Moving over to the coordinator pattern, this is my tab bar controller so far

    lazy var homeCoordinator = HomeCoordinator(navigationController: UINavigationController(), viewModel: self.viewModel)
    lazy var imagePickerCoordinator = ImagePickerCoordinator(navigationController: UINavigationController(), viewModel: self.viewModel)

    override func viewDidLoad() {
        super.viewDidLoad()

        homeCoordinator.start()
        imagePickerCoordinator.start()
        self.viewControllers = [homeCoordinator.navigationController, imagePickerCoordinator.navigationController]
        self.delegate = self
        setupComponents()
    }

and in the imagePickers are:

class ImagePickerCoordinator: Coordinator {

    var childCoordinators = [Coordinator]()
    var navigationController: UINavigationController
    let viewModel: ViewModel

    init(navigationController: UINavigationController, viewModel: ViewModel) {
        self.navigationController = navigationController
        self.viewModel = viewModel
    }

    func start() {
        let imagePickerController = ImagePickerController()
        imagePickerController.tabBarItem.image = #imageLiteral(resourceName: "plus")
        imagePickerController.coordinator = self

        //shows up on the tab bar
        //self.navigationController.pushViewController(imagePickerController, animated: true)

        //doesn't show up on the tab bar
        //self.navigationController.present(imagePickerController, animated: true)
    }
}

class ImagePickerController: UIViewController, UIImagePickerControllerDelegate   {
    weak var coordinator: ImagePickerCoordinator?

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {

    }
}

However I cannot get the image picker show modally. Push displays the button, but doesn't work, and present doesn't even show the tab bar button.

Any help would be much appreciated.