playNextPressed.swift

@IBAction func playNextPressed(_ sender: UIButton) {
        switch player.timeControlStatus {
        case .paused:
            playNPause.setImage(UIImage(systemName: SystemName.playFill), for: .normal)
            player.pause()
            let time = CMTime(value: 0, timescale: 1)
            player.seek(to: time)
            playingIndex = songs.firstIndex(of: songPlayed!)
            playingIndex += 1
            if playingIndex == songs?.count {
                playingIndex = 0
            }
            songPlayed = songs![playingIndex]
            configurePlayer(song: songPlayed!)
        case .playing:
            playingIndex = songs.firstIndex(of: songPlayed!)
            print("first: List\(playingIndex!)")
            playingIndex += 1
            if playingIndex == songs?.count {
                playingIndex = 0
            }
            songPlayed = songs![playingIndex]
            configurePlayer(song: songPlayed!)
            player.play()
            print("second: List\(playingIndex!)")
        default:
            break
        }
    }