A quick correction/clarification on the above technique for anybody wondering how this works from my poor explanation. - I should not have written 'sub-classin

A quick correction/clarification on the above technique for anybody wondering how this works from my poor explanation. - I should not have written 'sub-classing'; this technique works by actually extending an existing class (Objective C allows you to extend a class) - AFAIK this technique only works with Objective-C based apps.