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  • Book Overview & Buying Mastering Swift 6
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Mastering Swift 6

Mastering Swift 6 - Seventh Edition

By : Jon Hoffman
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Mastering Swift 6

Mastering Swift 6

5 (2)
By: Jon Hoffman

Overview of this book

This seventh edition of Mastering Swift 6 is your ultimate guide to harnessing the full power of Swift. Whether you're aiming to optimize the performance of your applications or looking to explore the exciting new features in Swift 6.2, this book has you covered. The author distills his 28 years of experience in the Engineering and IT fields to help you dive deep into advanced concepts and techniques, such as concurrency, memory management, and Generics, all essential for creating high-performance applications. The chapters take you on a flexible journey, covering Swift 6.2’s newest features alongside advanced programming topics such as reflection, concurrency, and Generics. Packed with best practices, testing strategies, and modern programming techniques, this book equips you with the skills to develop scalable, high-performance applications with confidence. Whether you're looking to stay competitive or simply want to excel in Swift 6, this book provides the tools and knowledge you need to succeed.
Table of Contents (25 chapters)
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23
Other Books You May Enjoy
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Index

Unavailability

Where the availability attribute lets us run a block of code, if we are running on the specified version of the operating system or higher, the unavailability attribute lets us run a block of code if we are not running on the specified version of the operating system or higher.

Prior to the unavailability attribute we may have had code similar to this:

if #available(iOS 16, *) { } else {
    // Functionality to make iOS 15 and earlier work
}

This would be used when we needed code to make the functionality of our application work when it is being run on an older version of the operating system. Now with the unavailability attribute we can write the code like this:

if #unavailable(iOS 16) {
    // Functionality to make iOS 15 and earlier work
}

An important difference between the availability and unavailability attributes is that the platform wildcard * is not allowed with the unavailability attribute. This is to avoid issues about which platforms should be considered...

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Mastering Swift 6
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