ios - When segue returns, what method is called? -

i have uitableview in uipopover; when tap on row in uitableview, go scene (uiview) start , stop times uidatepicker; using button returns calling uitableview, want take start , stop times , place them in couple of rows. save results in appdelegate don't lose them, done elsewhere.

question is: when dismiss uiview datepicker, how can change rows in uitableview when reappears? tried -viewwillappear, never hits after uiview dismissed. there method can use?

how adding notification observer uitableview class, e.g.

[[nsnotificationcenter defaultcenter] addobserverforname:@"updatetable" object:self queue:[nsoperationqueue mainqueue] usingblock:^(nsnotification *note) {     [self.mytableview reloaddata]; }]; 

and when dismiss uiview send notification

[[nsnotificationcenter defaultcenter] postnotificationname:@"updatetable" object:nil];