Book Image

Learning iOS UI Development

Book Image

Learning iOS UI Development

Overview of this book

Through this comprehensive one-stop guide, you’ll get to grips with the entire UIKit framework and in a flash, you’ll be creating modern user interfaces for your iOS devices using Swift. Starting with an overview of the iOS drawing system and the available tools, you will then learn how to use these technologies to create adaptable layouts and custom elements for your applications. Next, you’ll be introduced to other topics such as animation and code-drawing with Core Graphics, which will give you all the knowledge you need to create astonishing user interfaces. By the end of this book, you will have a solid foundation in iOS user interface development and will have gained valuable insights on the process of building firm and complex UIs.
Table of Contents (16 chapters)
Learning iOS UI Development
About the Author
About the Reviewers

User interface's traits

A trait consists of a set of properties that determines how the user interface or a portion of it should change as its environment or, more broadly, the available space for its contents and changes.

These properties include size classes for both horizontal and vertical dimensions as well as display scale, user interface idiom, and forceTouchCapability, and they define a trait collection.

Trait collection and trait environment

Designing adaptive user interfaces essentially means writing layouts that adapt according to changes in trait collections.

The UITraitCollection class is the data type that defines a trait collection and it is the entry point for the traits we described earlier. The following table illustrates the properties that are part of a trait collection:



  • verticalSizeClass

  • (UIUserInterfaceSizeClass)

This is the vertical size class for the trait collection; the possible values for this property are .Regular, .Compact, or .Unspecified...