iOS
Barra de navegación

Personaliza la apariencia predeterminada de la barra de navegación.

// Default UINavigationBar appearance throughout the app
[[UINavigationBar appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName: [UIColor whiteColor],
                                                       NSFontAttributeName : [UIFont fontWithName:@"HelveticaNeue-CondensedBold" size:17],
                                                       }];

[[UINavigationBar appearance] setTintColor:[UIColor whiteColor]];
[[UINavigationBar appearance] setBarTintColor:[UIColor KNGRed]];
[[UINavigationBar appearance] setTranslucent:NO];
[[UINavigationBar appearance] setBarStyle:UIBarStyleBlack];
[[UIBarButtonItem appearanceWhenContainedIn: [UISearchBar class], nil] setTintColor:[UIColor KNGGray]];

Ejemplo de SWIFT

navigationController?.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName: UIColor.white, NSFontAttributeName:UIFont(name: "HelveticaNeue-CondensedBold", size: 17)!,]
navigationController?.navigationBar.tintColor = .white
navigationController?.navigationBar.barTintColor = .red
navigationController?.navigationBar.isTranslucent = false
navigationController?.navigationBar.barStyle = .black