[scrod]

> AppKit and UIKit aren't at all similar. And they aren't related.

Actually, they're incredibly similar in terms of class hierarchy, design patterns (e.g., delegates, data sources, target/action for the most part), graphics principles (points vs pixels), use of various Foundation and CoreGraphics data structures, etc.

And yes, Core Animation works quite well with layer-backed views in AppKit, which is where it started.

It's easy to point out specific differences between these frameworks, but I think any developer who's already learned one would object to the underestimation of his/her intelligence that would be implied by comparing the subsequent difficulty in moving to the other with that of any other non-Apple platform SDK.

Perhaps you'd like to point out another SDK that is more similar to AppKit than UIKit?