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

Test your knowledge


  1. Swift uses one of the following mechanisms to automatically deallocate the memory used by instances that aren't referenced anymore:

    1. Automatic Random Garbage Collector.

    2. Automatic Reference Counting.

    3. Automatic Instance Map Reduce.

  2. Swift executes an instance's deinitializer:

    1. Before the instance is deallocated from memory.

    2. After the instance is deallocated from memory.

    3. After the instance memory is allocated.

  3. A deinitializer:

    1. Can still access all of the instance's resources.

    2. Can only access the instance's methods but no properties.

    3. Cannot access any of the instance's resources.

  4. Swift allows us to define:

    1. Only one initializer per class.

    2. A main initializer and two optional secondary initializers.

    3. Many initializers with different arguments.

  5. Each time we create an instance:

    1. We must use argument labels.

    2. We can optionally use argument labels.

    3. We don't need to use argument labels.

  6. Which of the following lines retrieves the runtime type as a value for an instance called circle1 in Swift 3:...