in ChartsDemo-iOS/Swift/AppDelegate.swift [18:36]
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
self.window = UIWindow(frame: UIScreen.main.bounds)
let vc = DemoListViewController()
let nav = UINavigationController(rootViewController: vc)
if #available(iOS 13.0, *) {
let appearance = UINavigationBarAppearance()
appearance.configureWithOpaqueBackground()
nav.navigationBar.standardAppearance = appearance
nav.navigationBar.scrollEdgeAppearance = appearance
}
window?.rootViewController = nav
window?.makeKeyAndVisible()
return true
}