ViewController Extension

UIViewController+Extension.swift

extension UIViewController {

    func isVisible() -> Bool {
        if #available(iOS 9.0, *) {
            if let view = self.viewIfLoaded {
                return view.window != nil
            }
            
            return false
        } else {
            return self.isViewLoaded && self.view.window != nil
        }
    }
}

extension UIViewController {
    /// iOS13의 모달 프레젠테이션 대응을 위한 present overload
    @objc
    func presentInFullScreen(_ viewController: UIViewController,
                             animated: Bool,
                             completion: (() -> Void)? = nil) {
        viewController.modalPresentationStyle = .fullScreen
        present(viewController, animated: animated, completion: completion)
    }
}