Wrapping a UIViewController in a UINavigationController

Question

I'd like my view controller to have its own navigation bar. I find this is easier than showing/hiding the existing navigation bar. The following code is working. Is this an anti-pattern or is it relatively common practice?

MyViewController *viewController = [[MyViewController alloc] init] 
                                    autorelease];

UINavigationController *wrapper = [[[UINavigationController alloc] 
                                   initWithRootViewController:viewController] 
                                    autorelease];

[self.navigationController presentViewController:wrapper 
                                        animated:YES 
                                      completion:nil];

Answer 1

To present a modal view controller with a nav bar and its own navigation stack, the code you posted is exactly right. The only thing you should be careful of is pushing a second UINavigationController onto an existing nav controller's stack -- that will cause you problems.

Answer 2

In Swift:

let mainViewController = MainViewController()
let navigationController = UINavigationController(rootViewController: mainViewController)
present(navigationController, animated: true, completion: nil)