Work with ViewControllers Programatically

gistfile1.m

    // Present VC from Storyboard
    // (include VC's header file)
    UIStoryboard *storyBoard = [UIStoryboard storyboardWithName:@"<STORYBOARD_NAME>" bundle:nil];
    UIViewController *vc = [mainStoryboard instantiateViewControllerWithIdentifier:@"<STORYBOARD_ID"];
    
    [self presentViewController:vc animated:FALSE completion:nil];
    
    // Call Segue from Storyboard
    [self performSegueWithIdentifier:@"<SEGUE_ID>" sender:self];