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  • Book Overview & Buying Learning Swift Second Edition
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Learning Swift Second Edition

Learning Swift Second Edition - 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

Structs


The most basic way that we can group together data and functionality into a logical unit or object is to define something called a structure. Essentially, a structure is a named collection of data and functions. Actually, we have already seen several different structures because all of the types such as string, array, and dictionary that we have seen so far are structures. Now we will learn how to create our own.

Types versus instances

Let's jump straight into defining our first structure to represent a contact:

struct Contact {
    var firstName: String = "First"
    var lastName: String = "Last"
}

Here we have created a structure by using the struct keyword followed by a name and curly brackets ({}) with code inside them. Just like with a function, everything about a structure is defined inside its curly brackets. However, code in a structure is not run directly, it is all part of defining what the structure is. Think of a structure as a specification for future behavior instead of...

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Learning Swift Second Edition
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