SubclassExample.m

#import "TSMessage.h"

@interface SubclassExample : TSMessage

@end

#import "SubclassExample.h"

@implementation SubclassExample
+ (CGFloat)navigationbarBottomOfViewController:(UIViewController *)viewController
{
    return 50;

}

@end

//then in your example project using it on the message notification 
- (IBAction)didTapMessage:(id)sender
{
    NSString *notificationTitle = NSLocalizedString(@"Tell the user something", nil);
    NSString *notificationDescription = (self.descriptionToggle.on ?
                                         NSLocalizedString(@"This is some neutral notification.", nil) :
                                         nil);
    
    CGFloat duration = (self.longDurationToggle.on ? TSSecondViewControllerLongDuration : 0.0);
    
    [SubclassExample showNotificationInViewController:self
                                      withTitle:notificationTitle
                                    withMessage:notificationDescription
                                       withType:TSMessageNotificationTypeMessage
                                   withDuration:duration
                                   withCallback:nil
                                     atPosition:(self.onBottomToggle.on ? TSMessageNotificationPositionBottom : TSMessageNotificationPositionTop)];
}