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You're reading from Learning iOS UI Development

Product type Book

Published in Dec 2015

Publisher

ISBN-13 9781785288197

Pages 196 pages

Edition 1st Edition

Languages

Swift

Concepts

iOS Development

Table of Contents (16) Chapters

Learning iOS UI Development

Credits

About the Author

About the Reviewers

www.PacktPub.com

Preface

1. UI Fundamentals

2. UI Components Overview – UIKit

3. Interface Builder, XIB, and Storyboard

4. Auto Layout

5. Adaptive User Interfaces

6. Layers and Core Animation

7. UI Interactions – Touches and Gestures

8. How to Build Custom Controls

9. Introduction to Core Graphics

Index

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:

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Trait	Description
`verticalSizeClass` `(UIUserInterfaceSizeClass)`	This is the vertical size class for the trait collection; the possible values for this property are `.Regular`, `.Compact`, or `.Unspecified`...