When I subclass UIViewController to use the subclass as the Custom Class of a view controller in Interface Builder, is that subclass a singleton? How do I find out? How would I make sure to make the object of the class a singleton?
View controllers are not singletons by default and I don’t recommend you trying to turn them into singletons after all. The first answer to this Stack Overflow question and post explains why you don’t want to do this in more detail:
Please let me know if you have any other questions or issues regarding the whole thing.