Apple has always had a funny relationship with responsive design. They’ve only sparingly used media queries to make minor visual tweaks on important pages, like their current homepage.
With iOS 6, and the subsequent release of the taller iPhone 5, Apple introduced something called Auto Layout—a relationship-based layout engine. Unlike the iPad, which required a separate build, apps for the taller iPhone were the same build with layout adjustments applied. Auto Layout was Apple’s first true foray into responsive design within native applications since, much like the web, different layout rules were applied to the same base code.
Last week, Apple introduced iOS 8, and with it, something they’re calling Adaptive UI. The main feature of Adaptive UI is the ability to specify layout rules based on Size Classes, which are really just breakpoints set by Apple.
Developers can now use a single View Controller (or page, in our world) with various layout rules applied across Size Classes (or breakpoints) to accommodate devices of all sizes. While there are only two Size Classes right now, compact and regular, Apple has left a lot of room to add more, or to even let developers set breakpoints themselves in the future.
It may be adaptive in name, and hard-coded breakpoints may seem like adaptive thinking, but the groundwork has been laid for responsive design within native iOS applications. It’s been interesting to watch Apple’s path from static, to adaptive, to responsive, and it’ll be even more interesting to watch third-party developers take advantage of the workflow benefits of responsive design that we’ve become accustomed to.