TrackDetailsViewController.swift

import UIKit

class TrackDetailsViewController: UIViewController {
    
    // ...
    
    @IBOutlet weak var copyrightLabel: UILabel!
    
    var track: Track?
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        if let track = track {
            // ...
            
            copyrightLabel.text = getCopyrightText(artistName: track.artistName)
        }
    }
    
    func setup(with track: Track) {
        self.track = track
    }
    
    fileprivate func getCopyrightText(artistName: String) -> String {
        let format = NSLocalizedString("copyright", comment: "")
        
        let currentYear = "\(Calendar.current.component(.year, from: Date()))"
        
        return String.localizedStringWithFormat(format, currentYear, artistName)
    }

}