if([self.navigationController.navigationBar
respondsToSelector:@selector(setBackgroundImage:forBarMetrics:)]
) {
//iOS
5 new UINavigationBar custom background
[self.navigationController.navigationBar
setBackgroundImage:[UIImage imageNamed:@"navbg_ForiPhone5_Imagename.png"]
forBarMetrics: UIBarMetricsDefault];
} else {
[self.navigationController.navigationBar
insertSubview:[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"navbg_ForOtherIphone_Imagename.png"]] atIndex:0];
}
