ios - Why is an NSDate in a Core Data managed Object converted to NSTimeInterval?

Question

I have an object with a property with a Date type defined in my xcdatamodeld object. Why has it generated the NSManagedObject class with a NSTimeInterval? And how do I set a NSDate on it and then get an NSDate back off it?

Answer 1

I get this if I check the "Use scalar properties for primitive data types" checkbox when I'm generating my files.

This is because NSTimeInterval is a double in disguise, whereas NSDate is a class that inherits from NSObject.