How to represent Core Data optional Scalars (Bool/Int/Double/Float) in Swift?

Question

(first noticed on: Xcode 8.2.1, iOS 10, Swift 3) (still present as of: Xcode 9 beta 3, iOS11, Swift 4)

We all know that the Core Data concept of o

Answer 1

I could use Objective-C types to manage these cases. In these cases, for scalars types, you can use NSNumber.

 @NSManaged public var myDouble: NSNumber?

In the model myDouble is an optional double with nil value by default.

To get the real value you only need to use:

myEntity.myDouble?.doubleValue