Tutorial by Topics: adaptivity

As you build adaptive apps, keep in mind the limitations of size classes: they are generalizations, not specific guides for exact pixel sizes or devices. Never attempt to determine what device your app is running on, or whether it's in a split-screen mode, based on the size classes. Instead, make...

For more details ( Size Classes and Adaptivity through Storyboard) of using auto layout for adaptivity in iOS, we can follow the apple developer site link. We can also add constraints Programatically using Visual Format Language as described here at apple developer site.