Adding Navigation Bar programmatically iOS

Question

I am trying to make an App with a Navigation Bar (Back button, title, etc) and a Tab Bar (Toolbar on the bottom). I am using subviews so I don\'t have to worry about the sta

Answer 1

Swift 5.

The context: Here is a view controller that is presented to edit a user's bio information.

import UIKit

class EditBioController: UIViewController {

    // What you need are these two classes. One is a navigation bar,
    // and the other will hold the items that are in the navigation bar.
    private var navigationBar: UINavigationBar!
    private var customNavigationItem: UINavigationItem!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Create a navigation bar with the width of the view, and the standard height of 44.
        navigationBar = UINavigationBar(frame: CGRect(x: 0, y: 0, width: self.view.frame.width, height: 44))
        
        // Initialize the UINavigationItem class. The name is a bit confusing, because as you'll see -
        // we add multiple items to the one 'UINavigationItem.'
        customNavigationItem = UINavigationItem()
        customNavigationItem.title = "Edit Bio"
        
        let leftBarButton = UIBarButtonItem(barButtonSystemItem: .cancel, target: self, action: #selector(selectorX))
        customNavigationItem.leftBarButtonItem = leftBarButton
        
        let rightBarButton = UIBarButtonItem(barButtonSystemItem: .save, target: self, action: #selector(selectorX))
        customNavigationItem.rightBarButtonItem = rightBarButton
        
        // Add the items to the navigation bar.
        navigationBar.items = [customNavigationItem]
        // Add the navigation bar to the view.
        self.view.addSubview(navigationBar)
        
        
    }
    
    @objc func selectorX() {
        
    }
    
}

Here's what this produces: