Add Right Button In NavigationController

Question

I have story board setup with all view controller extending navigation controller with class NavigationController: UINavigationController, UIViewControllerTransitioningDelegate with custom navigation bar setup for navigation controller with class CustomNavigationBar:UINavigationBar Here is the code for NavigationController

class NavigationController: UINavigationController, UIViewControllerTransitioningDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()
    }
}

Here is the code for CustomNavigationBar

class CustomNavigationBar: UINavigationBar {

    override func awakeFromNib() {
        var font = UIFont(name: "Montserrat-Light", size: 17)!
        if "ar" == userLocale() {
            font = UIFont(name: "DroidSansArabic", size: 17)!
        }
        let attribtutes = [
            NSFontAttributeName: font,
            NSForegroundColorAttributeName: UIColor.black,
            NSKernAttributeName: 5.0
            ] as [String : Any]
        UINavigationBar.appearance().titleTextAttributes = attribtutes
        UINavigationBar.appearance().tintColor = UIColor.black
        UINavigationBar.appearance().backgroundColor = UIColor.white

        let image = UIImage(named: "back-btn")
        UIBarButtonItem.appearance().setBackButtonTitlePositionAdjustment(UIOffsetMake(0, -66), for: .default)
        UINavigationBar.appearance().backIndicatorImage = image
    }
}

So far so good, I now want to add a right bar navigation item with a custom view. I tried adding the following code in NavigationController::viewDidLoad()

let customView:UIView = UIView()
customView.backgroundColor = .green
customView.frame = CGRect(x: 0, y: 0, width: 100, height: 100)
let item = UIBarButtonItem(customView: customView)
self.navigationItem.setRightBarButton(item, animated: false)

This for some reason is not showing up in navigation menu. Where am I going wrong?

Answer 1

You need add your custom navigation button code part in your base view controller, because every viewController have it own navigationItem, that is why your custom button is not showed

You need use a BaseViewController class for your needs, then subclassing all your viewController from your BaseViewController you only need add your navigation button customization code once, in viewDidLoad

Something like this

class BaseViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        let customView:UIView = UIView()
        customView.backgroundColor = .green
        customView.frame = CGRect(x: 0, y: 0, width: 100, height: 100)
        let item = UIBarButtonItem(customView: customView)
        self.navigationItem.setRightBarButton(item, animated: false) 
    }

}