Keep ordered images for entity in Core Data

Question

I have an entity called "Person" and a set of UIImages for it (One-To-Many). When the user enters the images, he's asked to do so in a chronological order to the person's life.

When I save & restore the data from Core Data, I need to keep the images order.

How would you suggest me to do it?

10x

Answer 1

Add and maintain a sortOrder attribute on your image entity. Add a sort descriptor for this attribute to keep images sorted by it. Core Data doesn't support ordered collections for performance reasons.

Answer 2

In this case, the datetime the image was added is data that you're interested in, so it should be included in your model somewhere.