iOS: MVVM-C ViewController super class

I have MVVM-C arch. Each UIViewController has a ViewModel and CoordinatorDelegate to notify the Coordinator when navigation needs to be performed. The code that creates the VC repeats itself, and I thought it would be great to create a super class to unify all static funcs that create the VC. Like this:

import UIKit

class MVVMCViewController: UIViewController {
    
    weak var coordinatorDelegate: CoordinatorDelegate?
    var viewModel: Modelling?
    
    static func initVC(storyboard: Storyboard,
                       coordinatorDelegate: CoordinatorDelegate?,
                       viewModel: Modelling?) -> Self {
        let viewController = Self.instantiate(in: storyboard)
        viewController.coordinatorDelegate = coordinatorDelegate
        viewController.viewModel = viewModel
        return viewController
    }
}

All CoordinatorDelegateProtocols will inherit from CoordinatorDelegate and all ViewModels will be inheriting from Modelling.

But the subclassing does not work smoothly.

Any ideas?

Hi this model wouldn't work fine.

MVVMCViewController has hardcoded protocols as variable type, so You should have the same in your childVC.

To make it work as u want MVVMCViewController show be generic (but can be a lot of issues with it), like

class MVVMCViewController<T: Modelling, U: CoordinatorDelegate>: UIViewController {
    
    weak var coordinatorDelegate: U?
    var viewModel: T?

}

or add just casted properties to ConnectViewController

class ConnectViewController: MVVMCViewController {
    
    weak var coordinatorDelegate: CoordinatorDelegate?
    var viewModel: Modelling?
    var currentDelegate: ConnectViewControllerCoordinatorDelegate? {
         coordinatorDelegate as? ConnectViewControllerCoordinatorDelegate
    }
    var currentVM: ConnectViewModel? {
         viewModel as? ConnectViewModel
    }
}