//Segue identifier is 'WithOpertionSegue'
//After the segue performs; prepare destination view controller
-(void)didPerformWithOpertionSegue:(UIStoryboardSegue *)segue sender:(id)sender{
    UIViewController *destination=(UIViewController *)segue.destinationViewController;

}

//Segue identifier is 'AfterOperationSegue'
//Before the segue performs
-(void)willPerformAfterOperationSegue:(id)sender{
    if(...)
      [self performSegueWithIdentifier:@"AfterOperationSegue" sender:sender];
}