index path from cell or button inside a cell in prepareforsegue

prepareforsegue.swift

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    super.prepare(for: segue, sender: sender)
  
    var indexPath:IndexPath? = nil
    if let cell = sender as? UITableViewCell {
        indexPath = tableView.indexPath(for: cell)
    }
    if let button = sender as? UIButton {
        let buttonFrame = button.convert(button.bounds, to:tableView)                
        indexPath = tableView.indexPathForRow(at: buttonFrame.origin)
    }
}