Primitive Method

 “When it comes to subclassing, knowing which methods are ‘primitive’ methods is important.

The notion of primitive methods are those methods form the basis of the public interface/class.

The rest of the methods are just convenience methods built around them. When overriding a

class behavior with subclassing, just overriding those primitive are often enough.” Ref[1]

Reference

1. Learning Objective-C -– Primitive Methods

Learning Objective-C -– Primitive Methods

2. What are the ‘primitive’ accessors for in Core Data?

http://stackoverflow.com/questions/7427373/what-are-the-primitive-accessors-for-in-core-data

3. Programming with Objective-C

https://developer.apple.com/library/ios/documentation/Cocoa/Conceptual/ProgrammingWithObjectiveC/Introduction/Introduction.html#//apple_ref/doc/uid/TP40011210-CH1-SW1

4. A quick reference cheat sheet for common, high level topics in Objective-C  (AAAA+)

https://github.com/DiamondStudio/Objective-C-CheatSheet