UIViewController+TransitioningDelegate.swift

import UIKit

extension UIViewController {
    public func present(
        _ viewController: UIViewController,
        with transitioningDelegate: UIViewControllerTransitioningDelegate,
        completion: (() -> Void)? = nil
    ) {
        viewController.transitioningDelegate = transitioningDelegate
        viewController.modalPresentationStyle = .custom
        self.present(viewController, animated: true) { [transitioningDelegate] in
            completion?()
            _ = transitioningDelegate
        }
    }

    public func dismiss(with transitioningDelegate: UIViewControllerTransitioningDelegate, completion: (() -> Void)? = nil) {
        self.transitioningDelegate = transitioningDelegate
        self.dismiss(animated: true) { [transitioningDelegate] in
            completion?()
            _ = transitioningDelegate
        }
    }
}