How To Chnage Navigationbar Color Ios/iphone

==> change the back button chevron color for a specific navigation contro:
self.navigationController.navigationBar.tintColor =

 [UIColor whiteColor];
==> TO change Whole Navigation bar color:-
[[UINavigationBar appearance] setTintColor:[UIColor whiteColor]];


UIBarButtonItem *backButton = [[UIBarButtonItem alloc] init];
backButton.title = @"go back - now!";
backButton.tintColor =

 [UIColor colorWithRed:0.1 green:0.5 blue:0.7 alpha:1.0];
self.navigationItem.backBarButtonItem = backButton;