Navigation Controller inside Tab Bar Controller is showing but Right Bar Button not showing - Swift 4 - Programmatic Approach

Question

I'm still new to iOS Dev.

Goal: Create an iOS App with Navigation Bar (with .add as right bar button) at the top and Tab Bar at the bottom screen using Programmatic approach (not using storyboards and xib)

So I did almost everything here: https://developer.apple.com/library/archive/documentation/WindowsViews/Conceptual/ViewControllerCatalog/Chapters/CombiningViewControllers.html

But apparently it doesn't work (maybe because it is old? idk) and I'm also not comfortable configuring the App Delegate yet.

So what I have are these:

CompanyViewController as UIViewController
AssessmentViewController as UIViewController

TabViewController as UITabBarController, UITabBarControllerDelegate

I tried putting navigation controllers inside each VCs (navigationBar when I tap Tab Bar Items, which is expected - but the Title and Right Bar Button is NOT showing
I tried creating Swift file UINavigationController and named it NavigationViewController then added it to the TabViewController -> viewControllers but what happened was it was added to the tab bars at the bottom of the screen so it's not what I need and it looks like an ordinary tab not a navigation bar.
This is the last one I tried which displays Navigation Controller with its title but not its right bar button...

class TabViewController: UITabBarController, UITabBarControllerDelegate { override func viewDidLoad() { super.viewDidLoad() self.delegate = self }

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)

    let tabOne = CompanyViewController()
    let tabOneBarItem = UITabBarItem(title: "Company", image: .none, tag: 1)

    tabOne.tabBarItem = tabOneBarItem

    let tabTwo = AssessmentViewController()
    let tabTwoBarItem2 = UITabBarItem(title: "Assessment", image: .none, tag: 2)

    tabTwo.tabBarItem = tabTwoBarItem2

    self.viewControllers = [tabOne, tabTwo]
    setUpNavigation()
}

func setUpNavigation() {
    navigationItem.title = "Company Assessmentz"
    self.navigationController?.navigationBar.barTintColor = colorLiteral
    self.navigationController?.navigationBar.isTranslucent = false
    self.navigationController?.navigationBar.titleTextAttributes = [NSAttributedString.Key.foregroundColor:colorLiteral]
    self.navigationController?.navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .add, target: self, action: #selector(selectorX))
}

@objc func selectorX() { }}

Loca Girl Loca Girl · Accepted Answer · 2020-01-22T09:42:27

replaced this:

self.navigationController?.navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .add, target: self, action: #selector(selectorX))

to this:

navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .camera, target: self, action: #selector(selectorX))

Navigation Controller inside Tab Bar Controller is showing but Right Bar Button not showing - Swift 4 - Programmatic Approach

1 Answers