Emulating aspect-fit behaviour using AutoLayout constraints in Xcode 6You're not describing scale-to-fit; you're describing aspect-fit. (I have edited your question in this regard.) The subview becomes as large as possible while maintaining its aspect ratio and fitting entirely inside its parent. Anyway, you can do this with auto layout. You can do it entirely in IB as of Xcode 5.1. Let's start with some views: The light green view has an aspect ratio of 4:1. The da
