pull-to-dismiss-snippet3.swift

extension UIViewController {
    
    func presentAsSheet(_ vc: UIViewController, height: CGFloat) {
        let presentationController = SheetModalPresentationController(presentedViewController: vc,
                                                                      presenting: self,
                                                                      height: height)
        vc.transitioningDelegate = presentationController
        vc.modalPresentationStyle = .custom
        present(vc, animated: true)
    }
    
}