Slides and Transcript:https://developer.apple.com/videos/play/wwdc2014-223
Description:Make better apps by trying things out first, before you write any code. Get a glimpse of Apple's prototyping process and the range of tools and techniques we use, some of which might surprise you.
Watch on apple.com
Slides and Transcript:http://devstreaming.apple.com/videos/wwdc/2015/803q4kw6eqia7ssp17/803/803_designing_with_animation.pdf?dl=1