This open source library acts as an NSCoding replacement, and when added to your project automatically adds methods to create an NSDictionary representation for easy saving/loading to a .PLIST file.
Also supported is saving of various Cocoa collection types and structures.
The library is Auto Magic Coding (AMC) from Stephan Generalov.
✔ Sources: https://github.com/psineur/NSObject-AutomagicCoding