objective c - UITableView didSelectRowAtIndexPath method not firing -

i placed tableview on xib file following method

-(void)tableview:(uitableview *)tableview didselectrowatindexpath:(nsindexpath *)indexpath{       nslog(@"fired event");  } 

and doesn't seem firing when click on cell in table. there i'm missing?

be sure include uitableviewdatasource, uitableviewdelegate in .h file