instantiateInitialViewController(withIdentifier: String) does not exist?

Question

Here is a screenshot from Xcode 8.2:

If the function does not exist, how do you add identifier to a view controller these days?

Answer 1

Use instead instantiateViewController(withIdentifier:) when you would like a ViewController and attach a view from the storyboard (UIStoryboard Id Identifier)

instantiateInitialViewController() is to instantiate the default view initial, this function takes no argument and is something you wouldn't usually do programmatically.