UITableViewCell delegate indexPath

Good time of day, I'm new in iOS development. I'm developing project where i have tableViewCell and button,progressBar on it. When i tap button indexPath of this cell is passed through delegate to viewController and then with another method i'm downloading some data and show it's progress in progressBar. So when i tap to one cell and then to another, progress in first cell stops and continues in second, could anyone help? Thanks in advance ) Here is delegate methods in viewController:

func didTouchButtonAt(_ indexPath: IndexPath) {
    songs[indexPath.row].isTapped = true
    let selectedSong = self.songs[indexPath.row] as Song
    DownloadManager.shared.delegate = self
    self.indexQueue.append(indexPath)
    self.selectedIndexPath = indexPath
    DownloadManager.shared.download(url: selectedSong.url , title: selectedSong.title)
}
func downloadProgress(_ progress: Progress) {        
    if (progress.completedUnitCount) < progress.totalUnitCount {
            selectedIndexPath = indexQueue.first
    }
    else if(!indexQueue.isEmpty){
        indexQueue.removeFirst()
    }
    print(progress.fractionCompleted)
    print(progress.completedUnitCount, progress.totalUnitCount)
    print(indexQueue.count)
    var cell: ViewControllerTableViewCell?
    cell = self.tableView.cellForRow(at: self.selectedIndexPath!) as? ViewControllerTableViewCell
    if cell != nil {
        cell?.progress = Float(progress.fractionCompleted)
    }
}

this is cell:

@IBAction func downloadButtonTouched(sender: Any){
    self.delegate?.didTouchButtonAt(self.indexPath!)
    self.progressBar.isHidden = false
}

As @RakshithNandish mentioned, I'v used list of indexPathes and when i tap to button, list adds indexPath. So, before passing progress to cell i check if progress is completed: if not, pass progress to first element of queue, otherwise just delete first element from queue, works fine.