在导航控制器之间导航时导航栏不显示标题

Question

I am trying to build an app with chat options integrated. My conversations view controller(where all the chats of one person are displayed in a tableView with multiple cells) is embedded in a navigation controller as well as the single chat view controller(where you are chatting with only one person).

To go from the conversations view controller to the single chat view controller I am implementing this code:

let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let _vc = storyboard.instantiateViewController(withIdentifier: "myNavigationController") as! UINavigationController
        _vc.title = "John Smith"
        _vc.modalPresentationStyle = .fullScreen
        present(_vc, animated: true, completion: nil)

However, the _vc.title is not showing on the navigation bar. How could I fix this?

Answer 1

_vc.navigationItem.title = "John Smith"

Set title using navigation item.

Answer 2

You need to create an instance of UINavigationController first:

 UINavigationController *navController = [self.storyboard instantiateViewControllerWithIdentifier:@"Viewe"];
ViewController2 *vc = (ViewController2 *) [navController topViewController];

navController.modalPresentationStyle = UIModalPresentationFullScreen;

vc.title = @"hello";

and present that navController instance.

Answer 3

There should be a VC that you are presenting first of all and incase you are considering of adding a VC then it goes something like this.

In Swift:

---

 let sb = UIStoryboard(name: "Main", bundle: nil)
 guard let vc = sb.instantiateViewController(withIdentifier: "SecViewController") as? SecViewController else { return }
 let navController = UINavigationController(rootViewController: vc)
 navigationController?.modalPresentationStyle = .fullScreen
 present(navController, animated: true)

And in the viewDidLoad of SecViewController give title = "John Smith" . This will help you add title.