I want to show alertViewController on my rootViewController in AppDelegate when app is launched. Here snippet of code:
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
let alert: UIAlertController = UIAlertController(title: "This is title", message: "This is message.", preferredStyle: UIAlertControllerStyle.alert)
alert.addAction(UIAlertAction(title: "Ok", style: .default))
self.window?.rootViewController?.present(alert, animated: true, completion: nil)
return true
}
alert is not appearing on rootViewController. Please help me.