Customize NavigationBarItem

    UIViewController *mine = [self.navigationController.viewControllers objectAtIndex:0];

    

    UIImage *nextImg = [UIImage imageNamed:@"NextIcon.png"];

    UIButton *nextBtn = [UIButton buttonWithType:UIButtonTypeCustom];

    [nextBtn setBackgroundImage:nextImg forState:UIControlStateNormal];

    nextBtn.frame = CGRectMake(0, 0, nextImg.size.width, nextImg.size.height);

    [nextBtn addTarget:self action:@selector(nextAction:) forControlEvents:UIControlEventTouchUpInside];

    

    UIBarButtonItem *next = [[[UIBarButtonItem alloc] initWithCustomView:nextBtn]autorelease];

    

    mine.navigationItem.rightBarButtonItem = next;