Swift: "Attempt to present UIAlertController whose view is not in the window hierarchy!"
try to present your UIAlertController in a DispatchQueue
DispatchQueue.main.async { let alert = UIAlertController(title: "Alert!", message: nil, preferredStyle: .alert) let cancelAction = UIAlertAction(title: "OK", style: .cancel, handler: nil) alert.addAction(cancelAction) self.present(alert, animated: true, completion: nil) }
This line:
ViewController().present(alertView!, animated: true, completion: nil)creates a new instance of ViewController and calls the present method on it. That won't work. You need to call it from a view controller that is itself presented. It looks like that code is inside ConsoleViewController, maybe you can just use self there.