ViewCode7.swift

class CustomViewController<CustomView: UIView>: UIViewController {
    var customView: CustomView {
        return view as! CustomView
    }

    override func loadView() {
        view = CustomView()
    }
}

final class MyViewController: CustomViewController<MyView> {
    override func loadView() {
        super.loadView()
        customView.delegate = self
    }
}