Since the iPhone 6 & 6+, we have 16 different device sizes to handle in iOS. In this lightning talk, Victor demonstrates how to build iOS UIs in a declarative, reusable and configurable way.
Victor Wang is working on a library based on what he talked about in this video, which lead us to build our UI in iOS hassle free. Look for an upcoming open source release and more information on his blog: allblue.me