Book Image

Swift 3 Object-Oriented Programming - Second Edition

By : Gaston C. Hillar
Book Image

Swift 3 Object-Oriented Programming - Second Edition

By: Gaston C. Hillar

Overview of this book

Swift has quickly become one of the most-liked languages and developers’ de-facto choice when building applications that target iOS and macOS. In the new version, the Swift team wants to take its adoption to the next level by making it available for new platforms and audiences. This book introduces the object-oriented paradigm and its implementation in the Swift 3 programming language to help you understand how real-world objects can become part of fundamental reusable elements in the code. This book is developed with XCode 8.x and covers all the enhancements included in Swift 3.0. In addition, we teach you to run most of the examples with the Swift REPL available on macOS and Linux, and with a Web-based Swift sandbox developed by IBM capable of running on any web browser, including Windows and mobile devices. You will organize data in blueprints that generate instances. You’ll work with examples so you understand how to encapsulate and hide data by working with properties and access control. Then, you’ll get to grips with complex scenarios where you use instances that belong to more than one blueprint. You’ll discover the power of contract programming and parametric polymorphism. You’ll combine generic code with inheritance and multiple inheritance. Later, you’ll see how to combine functional programming with object-oriented programming and find out how to refactor your existing code for easy maintenance.
Table of Contents (17 chapters)
Swift 3 ObjectOriented Programming - Second Edition
Credits
About the Author
Acknowledgement
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Understanding elements that compose a class


So far, we have worked with a very simple class and many instances of this class in the Playground, the Swift REPL and the web-based Swift Sandbox. Now, it is time to dive deep into the different members of a class.

The following list enumerates the most common element types that you can include in a class definition in Swift and their equivalents in other programming languages. We have already worked with a few of these elements:

  • Initializers: These are equivalent to constructors in other programming languages

  • Deinitializers: These are equivalent to destructors in other programming languages

  • Type properties: These are equivalent to class fields or class attributes in other programming languages

  • Type methods: These are equivalent to class methods in other programming languages

  • Subscripts: These are also known as shortcuts

  • Instance properties: These are equivalent to instance fields or instance attributes in other programming languages

  • Instance methods...