title: How to get cell index path by cell text label in iOS on outside button clicked
body: <p>i have an UITableView on screen with some data(text label) in cells. 
  Also have an button on screen outside from UITableView.
  i need to access an specific cell/cell.IndexPath of UITableView to 
  change that specific cell text color by finding cell text on button click.
  plz help..</p>