Book Image

An iOS Developer's Guide to SwiftUI

By : Michele Fadda
Book Image

An iOS Developer's Guide to SwiftUI

By: Michele Fadda

Overview of this book

– SwiftUI transforms Apple Platform app development with intuitive Swift code for seamless UI design. – Explore SwiftUI's declarative programming: define what the app should look like and do, while the OS handles the heavy lifting. – Hands-on approach covers SwiftUI fundamentals and often-omitted parts in introductory guides. – Progress from creating views and modifiers to intricate, responsive UIs and advanced techniques for complex apps. – Focus on new features in asynchronous programming and architecture patterns for efficient, modern app design. – Learn UIKit and SwiftUI integration, plus how to run tests for SwiftUI applications. – Gain confidence to harness SwiftUI's full potential for building professional-grade apps across Apple devices.
Table of Contents (25 chapters)
Free Chapter
1
Part 1: Simple Views
5
Part 2: Scrollable Views
8
Part 3: SwiftUI Navigation
11
Part 4: Graphics and Animation
14
Part 5: App Architecture
17
Part 6: Beyond Basics

Gestures

Gestures are a way to recognize and respond to touch events. They are used to add interaction to SwiftUI views. Some examples of gestures that are used include zooming in on images by pinching, dismissing views by swiping down, and double tapping.

We can conceptually divide gestures into three categories: basic, advanced, and composite.

Basic gestures attach a single simple straightforward gesture to a view, such as tapping or swiping, and they are typically simple to implement because they can be implemented with a few lines of code. These actions mimic natural human actions and are intuitive for human users. Their behavior is what the user normally expects by having been exposed across multiple applications and as such they minimize the cognitive load required to interact with the app; users don’t need to think hard to remember complex gestures.

Complex gestures, both advanced and composite, instead involve multiple touch points (multiple fingers) and multiple...