Purchase the full edition of this Objective-C book in Print ($14.99) or eBook ($12.99) format Objective-C 2.0 Essentials Print and eBook (ePub/PDF/Kindle) editions contain 31 chapters. In Working with Directories in Objective-C we looked at the NSFileManager, NSFileHandle and NSData Foundation Framework classes and discussed how the NSFileManager class in particular enables us to work with directo