Modify the NavigationBar in SwiftUI

UINavigation+Appearance.swift

import Foundation
import UIKit


extension UINavigationController {
    override open func viewDidLoad() {
        super.viewDidLoad()

        let appearance = UINavigationBarAppearance()
        //background color of the navigation and status bar
        appearance.backgroundColor = UIColor(.red)
        //color when the title is large
        appearance.largeTitleTextAttributes.updateValue(UIColor.white, forKey: NSAttributedString.Key.foregroundColor)
        //color when the title is small
        appearance.titleTextAttributes.updateValue(UIColor.white, forKey: NSAttributedString.Key.foregroundColor)
        // change the background- and title foregroundcolor for navigationbar
        navigationBar.standardAppearance = appearance
        navigationBar.scrollEdgeAppearance = appearance
        navigationBar.compactAppearance = appearance
        // change color of navigationbar items
        navigationBar.tintColor = .white
    }
}