There are two possible events when a table row is tapped. Selecting the rwo and the Accessory View (Usually the "more details" type action.
As long as you have registered a delegate for the UITableView, the following can be implemented and will be called on a touch:
Table Row: - (void) tableView: (UITableView *) tableView didSelectRowAtIndexPath: (NSIndexPath *) indexPath { ... }
Accessory Touch: - (void) tableView: (UITableView *) tableView accessoryButtonTappedForRowWithIndexPath: (NSIndexPath *) indexPath{ ... }