Designing a user interface can be challenging. Not only do you need to design a user interface that's easy to use, but you also need to design an adaptive user interface that can respond to any changes the user might make to a window's size. If the user shrinks a window, your user interface must shrink accordingly without cutting any items off. If the user enlarges a window, your user interface must expand accordingly to maintain a consistent appearance.
To help create adaptive user interfaces , Xcode provides constraints that fix the edges of various user interface ...
