Change UIImagePicker Navigation Bar style to blue

- (void)navigationController:(UINavigationController *)navigationController

      willShowViewController:(UIViewController *)viewController

                    animated:(BOOL)animated

{

   navigationController.navigationBar.barStyle = UIBarStyleDefault;

     navigationController.navigationBar.tintColor = [UIColorredColor];

    [viewController.navigationItem setTitle:@"gaga"];

}