Customize UINavigationBar Appearance Programmatically in UIViewController

The following Swift code example will demonstrate how we can customize UINavigationBar appearance in UIViewController. It will also cover how to:

• Set UINavigationBar tint color,
• Set Navigation bar Title color,
• Set navigation bar ItemButton tint color,
• Set Navigation bar background image.

import UIKit
class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        
                // Set navigation bar background colour
        self.navigationController!.navigationBar.barTintColor = UIColor.yellow
        
        // Set navigation bar title text colour
        self.navigationController!.navigationBar.titleTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.black]
        
        // Set Navigation bar background Image
        let navBgImage:UIImage = UIImage(named: "bg_blog_navbar_reduced.jpg")!
        self.navigationController!.navigationBar.setBackgroundImage(navBgImage, for: .default)
    }
 
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}

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