#import "UIViewController+SMTNavigationBar.h"

 UIButton * leftBtn = [[UIButton alloc]initWithFrame:CGRectMake(0, 0, 44, 44)];
    [leftBtn setTitle:@"left" forState:UIControlStateNormal];
    [leftBtn setTitleColor:[UIColor redColor] forState:UIControlStateNormal];

[self createButtonWithKey:@"leftBtn" button:leftBtn];

 [self setLeftBarButtonItemWithKey:@"leftBtn" isDefault:YES isPop:YES];

 -(void)viewWillAppear:(BOOL)animated{
    [self loadDefaults];
    }

/* List of items
    LEFT_ITEM
    RIGHT_ITEM
    TITLE_ITEM
    TITLEVIEW_ITEM
*/
[self loadDefaultWithItem:RIGHT_ITEM];

[self setLeftBarButtonItemWithKey:@"leftBtn" isDefault:YES withSelectorBlock:^(UIViewController *vc) {
        //When controller is popped. VC becomes a uinavigationcontroller class.
        if([vc isKindOfClass:[UINavigationController class]]){
            UINavigationController * vcs = (UINavigationController *) vc;
            vc = [vcs viewControllers].lastObject;
        }
     NSLog(@"This is the block method generated on first VC but is now being presented in %@",vc.navigationItem.title);
     }];

 if([vc isKindOfClass:[UINavigationController class]]){
            UINavigationController * vcs = (UINavigationController *) vc;
            vc = [vcs viewControllers].lastObject;
        }

 [self runLeftSuperBlock];
 [self runRightSuperBlock];

    -(void)SMTNavigationBarDidTapLeftItem
    -(void)SMTNavigationBarDidTapRightItem
    -(void)SMTNavigationBarDidPop

 UIImageView * imgView =[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"logo.png"]];
 imgView.contentMode = UIViewContentModeScaleAspectFill;
 imgView.clipsToBounds = NO;
 [self createTitleViewWithKey:@"titleView" titleview:imgView];

 [self setTitleViewWithKey:@"titleView" isDefault:YES];

[self setTitle:@"ABC" isDefault:YES];