Can't set titleView in the center of navigation bar because back button

Question

I\'m using an image view to display an image in my nav bar. The problem is that I can\'t set it to the center correctly because of the back button. I checked the related que

Answer 1

I created a custom UINavigationController that after dropping in, the only thing you have to do is call showNavBarTitle(title:font:) when you want to show and removeNavBarTitle() when you want to hide:

class NavigationController: UINavigationController {

    private static var mTitleFont = UIFont(name:  , size: )!
    private static var mNavBarLabel: UILabel = {

        let x: CGFloat = 60
        let y: CGFloat = 7
        let label = UILabel(frame: CGRect(x: x, y: y, width: UIScreen.main.bounds.size.width - 2 * x, height: 44 - 2 * y))

        label.adjustsFontSizeToFitWidth = true
        label.minimumScaleFactor = 0.5
        label.font = NavigationController.mTitleFont
        label.numberOfLines = 0
        label.textAlignment = .center

        return label
    }()

    func showNavBarLabel(title: String, font: UIFont = mTitleFont) {
        NavigationController.mNavBarLabel.text = title
        NavigationController.mNavBarLabel.font = font
        navigationBar.addSubview(NavigationController.mNavBarLabel)
    }

    func removeNavBarLabel() {
        NavigationController.mNavBarLabel.removeFromSuperview()
    }
}

I find the best place to call showNavBarTitle(title:font:) and removeNavBarTitle() are in the view controller's viewWillAppear() and viewWillDisappear() methods, respectively:

class YourViewController: UIViewController {

    func viewWillAppear() {
        (navigationController as! NavigationController).showNavBarLabel(title: "Your Title")
    }

    func viewWillDisappear() {
        (navigationController as! NavigationController).removeNavBarLabel()
    }
}