Grouping methods into categories Objective-C

Question

If I have several different groups of methods that I would like to use in multiple classes, which are all subclasses of UIViewController, would it be better style to include all of these methods into a single category, like UIViewController+allGeneralMethods.h

or have multiple categories like UIViewController+Animations.h , UIViewController+GestureRecognizers , UIViewController+DateFormatters , etc.

Answer 1

I assume that your goal is to keep your code easy to investigate, use and modify.

Put all groups in one category if:

1. Most of your classes will use methods from all groups.
2. Each group includes only 1-2 methods.
3. Your development team is small and you do not expect that a lot of people will read your code (fragmented code easier to understand).

Put your code in several categories in other cases.