orangeince

// MARK: UIViewController
extension UIViewController {
    static var topMost: UIViewController? {
        var top = UIApplication.shared.keyWindow?.rootViewController
        while true {
            if let presented = top?.presentedViewController {
                top = presented
            } else if let nav = top as? UINavigationController {
                top = nav.visibleViewController
            } else if let tab = top as? UITabBarController {