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

Working with Swift 3 on the web


In case we want to work with Swift 3 in Windows or in any other platform, we can work with a web-based Swift sandbox developed by IBM. We just need to open the following web page in a web browser: https://swiftlang.ng.bluemix.net/#/repl.

The IBM Swift Sandbox mimics the Playground with a text-based UI and it allows you to enter the code on the left-hand side and watch the results of the execution on the right-hand side. The sandbox is simple and not as powerful as the Xcode Playground. As it happens with Swift in Ubuntu Linux, we won't be able to run the examples that interact with any iOS API. However, we will be able to run a big percentage of the sample code included in this book, and we will be able to learn the most important object-oriented principles with any compatible web browser.

The following screenshot shows IBM Swift Sandbox displaying the results of executing two lines of Swift code in Chrome under Windows 10. We just need to enter the Swift code on the left-hand side and click on the Execute button (play icon) to see the results of compiling and executing the code on the right-hand side: