static func saveAlbums() {
        let encodedAlbums = objects.map { (album) -> Data in
            return NSKeyedArchiver.archivedData(withRootObject: album)
        }
        UserDefaults.standard.set(encodedAlbums, forKey: "albums")

    }


override func viewDidAppear(_ animated: Bool) {
        if (MasterViewController.objects.count > 0) {
            return
        }

        if let albums = UserDefaults.standard.object(forKey: "albums") as? [Data]{
            print("there is albums")
            let decoded = albums.map({ (data) -> Album in
                return (NSKeyedUnarchiver.unarchiveObject(with: data) as? Album)!
            })

            MasterViewController.objects = decoded;
            DispatchQueue.main.async {
                self.tableView.reloadData()
            }
        } else {
            loadAlbums()
        }
    }