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

Asynchronous streams

Asynchronous streams are similar to asynchronous sequences. AsyncStream is the Swift protocol that defines asynchronous streams. It is less flexible, simpler to use, and requires less code than AsyncSequence.

The AsyncStream protocol conforms to AsyncSequence, but it offers a more streamlined method for generating asynchronous sequences and does not require you to define manually an asynchronous iterator.

AsyncStream’s initializer is defined as follows:

init(Element.Type, bufferingPolicy: AsyncStream<Element>.Continuation.BufferingPolicy, (AsyncStream<Element>.Continuation) -> Void)

The initializer builds an asynchronous stream for an element type, with the specified buffering policy and the element-producing closure “continuation.”

Continuations in computer science are abstract representations of the control state of a computer program. A continuation captures the computation that remains to be executed at a certain...