Book Image

Swift Cookbook. - Second Edition

By : Keith Moon, Chris Barker
Book Image

Swift Cookbook. - Second Edition

By: Keith Moon, Chris Barker

Overview of this book

Swift is an exciting, multi-platform, general-purpose programming language, and with this book, you'll explore the features of its latest version, Swift 5.3. The book begins with an introduction to the basic building blocks of Swift 5.3, its syntax, and the functionalities of Swift constructs. You’ll then discover how Swift Playgrounds provide an ideal platform to write, execute, and debug your Swift code. As you advance through the chapters, the book will show you how to bundle variables into tuples or sets, order your data with an array, store key-value pairs with dictionaries, and use property observers. You’ll also get to grips with the decision-making and control structures in Swift, examine advanced features such as generics and operators, and explore functionalities outside of the standard library. Once you’ve learned how to build iOS applications using UIKit, you'll find out how to use Swift for server-side programming, run Swift on Linux, and investigate Vapor. Finally, you'll discover some of the newest features of Swift 5.3 using SwiftUI and Combine to build adaptive and reactive applications, and find out how to use Swift to build and integrate machine learning models along with Apple’s Vision Framework. By the end of this Swift book, you'll have discovered solutions to boost your productivity while developing code using Swift 5.3.
Table of Contents (14 chapters)
12
About Packt
Performance and Responsiveness in Swift

We have covered a lot of ground in the previous chapters, and we have a lot of Swift tools in our tool belt. Now it's time to delve into more advanced topics, looking at how certain Swift types are implemented, how they can be used, and what their performance characteristics are. We will also look at how we can perform asynchronous tasks using Grand Central Dispatch (GCD) through the Dispatch framework and the higher-level operations in the Foundation framework that are also built on GCD.

Understanding the multithreaded environment available on all Apple platforms, as well as the performance profile of the Swift constructs you use, is vital to building a fast and responsive app.

In this chapter, we will cover the following recipes:

  • Value and reference semantics
  • Using Dispatch queues for concurrency
  • Concurrent queues and dispatch groups...