Thanks to all that could make last night's talk: Whistle Stop Swift: Creating Apps Without Interface Builder.
If you weren't able to come along, I created a demonstration Swift app for creating colours using red, green and blue sliders. The presentation covered component creation and layout, using didSet(), actions and control events, observers, UIPickerViews and UICollectionViews, different types of alerts and using Core Data for persisting data.
There's a video on the way, but in the meantime, here's a link to the Keynote presentation and here's a link to the Github repository for the companion project.
I'm quite proud of this talk: if you're in London (or if you're somewhere exotic and don't mind paying my travel!) and would like me to come along and present it to your user group or company, drop me a line. I'll do it for free if you're non-profit.