How to present UIAlertController when not in a view controller?

Question

Scenario: The user taps on a button on a view controller. The view controller is the topmost (obviously) in the navigation stack. The tap invokes a utility class method call

Answer 1

You can try to implement a category on UIViewController with mehtod like - (void)presentErrorMessage; And and inside that method you implement UIAlertController and then present it on self. Than in your client code you will have something like:

[myViewController presentErrorMessage];

In that way you'll avoid unneccessary parametrs and warnings about view not being in window hierarchy.