Simple example of not clean ethod Implementation.

ViewController+UITableViewDelegate(Not clean).swift

import UIKit

extension ViewController: UITableViewDelegate {
    
    // Some UITableViewDelegate methods
    // ...
  
    func scrollViewDidScroll(_ scrollView: UIScrollView) {
        let verticalOffset = tableView.contentOffset.y
        if verticalOffset >= 64 {
            navigationController?.unTransparentNavBar(tintColor: Resources.Color.primaryColor, barTintColor: .white)
            let textAttributes = [NSAttributedStringKey.foregroundColor: UIColor.black]
            navigationController?.navigationBar.titleTextAttributes = textAttributes
        } else {
            navigationController?.transparentNavBar(tintColor: .white)
            let textAttributes = [NSAttributedStringKey.foregroundColor: UIColor.clear]
            navigationController?.navigationBar.titleTextAttributes = textAttributes
        }
    }
    
}