NIScheduleBaseViewController.m

// NIScheduleBaseViewController.h
@interface NIScheduleBaseViewController : UIViewController <ScheduleNavigationDelegate>

@end

// NIScheduleBaseViewController.m
@implementation NIScheduleBaseViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    NINavigationBarSchedule *navBar = (NINavigationBarSchedule *)self.navigationController.navigationBar;
    navBar.scheduleDelegate = self;
}

#pragma mark - Schedule Navigation Bar Delegates

- (NSString *)getScheduleScreenIdentifier
{
    return self.restorationIdentifier;
}

@end