Category Archives: iOS

Here’s a quick Update to the iOS Support Matrix

Edit: Please use the updated version

iOS Support Matrix Update
I know that there will be new iOS devices coming out in the next weeks, but I needed an updated version of the great (but outdated) “iOS Support Matrix” now. So I just went ahead and made one 😉

I’ve added five new devices, the iPod touch 6th gen, iPhone 6s & 6s Plus, iPad mini4 and iPad Pro. I also changed the names of the iPads to the common number scheme (“iPad 3” instead of “new iPad”).

Hope you like it and please let me know if you find any errors.

Download PDF

PS: I didn’t have time to add icons for the new hardware features like Barometer and 3D Touch, please bear with me!

How to implement Unique Constraints in Core Data with iOS 9

With iOS 9, Apple introduces Unique Constraints for Core Data. This new feature was briefly demonstrated at WWDC in June (Session 220). When I tried to implement it, I came across a few pitfalls and unexpected behavior, so I thought this might be worth a blog post.

Unique Constraints are a way to declare a custom attribute to be unique across all instances of an entity. Its intended use case is the import of external data that should be merged with existing objects in the database.
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