Vfrdtyky

I'm building a social network that allows users to navigate from one profile to the next, by viewing who they follow. For simplicity, I created a test project with two view controllers: ViewController and SecondViewController.

Each view controller has a button that fires an IBAction to instantiate the next view controller. That view is then pushed on the navigation stack. A user can do this as long as there is another viewController to push. But when they start returning/popping is when I have issues.

Here's ViewController:

class ViewController: UIViewController {

    @IBOutlet weak var pageNumberLabel: UILabel!



    override func viewWillAppear(_ animated: Bool) {

        super.viewWillAppear(animated)



        self.navigationItem.title = "First"

        setUp()

    }



    func setUp() {

        print("Setup 1")



        let navBarAppearance = self.navigationController!.navigationBar

        navBarAppearance.setBackgroundImage(UIImage(), for: .default)

        navBarAppearance.shadowImage = UIImage()

        navBarAppearance.barStyle = .black

        navBarAppearance.isTranslucent = true

        navBarAppearance.tintColor = .white

        navBarAppearance.titleTextAttributes = [NSAttributedString.Key.foregroundColor : UIColor.white]

        self.navigationController?.view.backgroundColor = UIColor.lightGray

    }



    @IBAction func pushSecondViewController() {

        if let vc = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "secondVC") as? SecondViewController {

            print("-")

            self.navigationController?.pushViewController(vc, animated: true)

        }

    }

}

Here's SecondViewController:

class SecondViewController: UIViewController {

    @IBOutlet weak var pageNumberLabel: UILabel!



    override func viewWillAppear(_ animated: Bool) {

        super.viewWillAppear(animated)



        self.navigationItem.title = "Second"

        setUp()

    }



    func setUp() {

        print("Setup 2")



        let navBarAppearance = self.navigationController!.navigationBar

        navBarAppearance.isTranslucent = false

        navBarAppearance.barTintColor = .white

        navBarAppearance.tintColor = .blue

        navBarAppearance.barStyle = .black

        navBarAppearance.titleTextAttributes = [NSAttributedString.Key.foregroundColor : UIColor.blue]

    }



    @IBAction func pushFirstViewController() {

        if let vc = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "firstVC") as? ViewController {

            print("-")

            self.navigationController?.pushViewController(vc, animated: true)

        }

    }

}

When SecondViewController is popped and ViewController is presented, the navigationTitle stays UIColor.blue. However, if I swipe from SecondViewController to ViewController, the title correctly changes colors.

Why is this?

I found a workaround solution to this issue...originally posted here. I put the following code in my setUp() function for my navigation bar.

let titleView = UIView(frame: CGRect(x: 0, y: 0, width: 100, height: 50))

titleView.backgroundColor = UIColor.clear

let titleLabel = UILabel(frame: CGRect(x: 0, y: 0, width: 100, height: 50))

titleLabel.textAlignment = .center

titleLabel.text = [My View Name]

titleLabel.textColor = .blue

titleView.addSubview(titleLabel)

self.navigationItem.titleView = titleView

self.navigationItem.title = [My View Name]