Good timing for me! I've been recently learning Swift. The language itself is terrific and managing memory is 10x better than using Objective-C (I learned it 12 years ago, and it was a chore). Exceptionally well-made language... though pretty nascent so changes and updates were a bit chaotic.
But the layout of storyboards was always terribly clunky with the file system, and the method mgmt system, then the storyboard and the properties inspector taking equal footing in the layout. This new layout is already 10x better with a clear ViewController class present on the left and storyboard (with component elements!) on the right.
I think this is one of the biggest things from this years WWDC impacting me as a designer. Can't wait to get into SwiftUI and learn first hand restrictions, possibilities and use this to inform my designs better.
Sketch import plugin anyone?
I am interested to see how this goes over given a lot of developer's dislike for drag and drop programming (tends to create very messy, non-maintainable code). I can see it being picked up by designers, but then recreated by developers.
The way you hook up Outlets is still a bit goofy to me, but storyboards and nib visual builders are 10x faster and generally more maintainable. You have to run the sim to see any custom coded elements added to a view... that's a lot of wasted time for something that benefits from the inherent visualness of a UI builder.