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Learning Swift Second Edition

Learning Swift Second Edition

By : Andrew J Wagner
5 (1)
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Learning Swift Second Edition

Learning Swift Second Edition

5 (1)
By: Andrew J Wagner

Overview of this book

Swift is Apple’s new programming language and the future of iOS and OS X app development. It is a high-performance language that feels like a modern scripting language. On the surface, Swift is easy to jump into, but it has complex underpinnings that are critical to becoming proficient at turning an idea into reality. This book is an approachable, step-by-step introduction into programming with Swift for everyone. It begins by giving you an overview of the key features through practical examples and progresses to more advanced topics that help differentiate the proficient developers from the mediocre ones. It covers important concepts such as Variables, Optionals, Closures, Generics, and Memory Management. Mixed in with those concepts, it also helps you learn the art of programming such as maintainability, useful design patterns, and resources to further your knowledge. This all culminates in writing a basic iOS app that will get you well on your way to turning your own app ideas into reality.
Table of Contents (14 chapters)
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13
Index

Chapter 7. Everything Is Connected – Memory Management

When using an app, there is nothing worse than it being slow and unresponsive. Computer users have come to expect every piece of software to respond immediately to every interaction. Even the most feature-rich app will be ruined if it is unpleasant to use because it doesn't manage the device resources effectively. Also, with the growing popularity of mobile computers and devices, it is more important than ever to write software that uses battery power efficiently. One of the aspects of writing software that has the largest impact on both responsiveness and battery power is memory management.

In this chapter, we will discuss techniques specific to Swift that allow us to manage memory in order to ensure that our code remains responsive and minimizes its effect on battery life and other apps. We will do so by covering the following topics:

  • Computer data storage
  • Value types versus reference types
  • Automatic reference counting...

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