Xcode 6 – Unified storyboard & Size Classes

Question

How does auto-layout work to create interfaces in Xcode 6 beta? What are different size classes & how do they work? How to use the "Resizable Unified Storyboard" to create universal iOS app?

Answer 1

I think you are talking about "Size Classes" introduced in XCode6.

A size class is a new technology used by iOS to allow you to custom your app for a given device class, based on its orientation and screen size.

There are presently four size classes.

At any time your device is going to have a horizontal size class and a vertical size class.

You don't need to worry about device size. Whether it is iPhone 4s, 5 or mighty iPhone 6. UI would be handled automatically for you...

For more info read this article.

See this WWDC Video for more clarity..Building Adaptive Apps with UIKit

Answer 2

With that new feature only aspect ratios are defined. Click at the button "blue" area and you will see the description for the aspect:

wAny hRegular -> For all regular height layouts (e.g. iPhones in portrait, and iPads in portrait or landscape)