objective c - Hiding a UIView -

i have several uiviews on xib file , dynamically hide them when want. have following code below reason it's not hiding them. ideas do?

-(void)tableview:(uitableview *)tableview didselectrowatindexpath:(nsindexpath *)indexpath{     //hide static uiviews     _searchbox.hidden = yes;     _searchbutton.hidden = yes;     _logo.hidden = yes;      nslog(@"fired event");     //todo: create new view holds zoomed in image  } 

are theses items iboutlet connected ones in nib file? , referencing outlets linked? cause.