What is the difference between primitive data type vs an non primitive data type(apple defined data type)? [closed]

Answer 1

Primitive data types store a direct value, for example NSInteger stores an integer value (either a 32 bit Integer, or a 64 bit Integer depending on the compiled architecture), Objects are an instance of a class, with methods, properties, etc.

In order to get an NSInteger from an NSNumber, you would use

[aNumber intValue];