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  • Book Overview & Buying Swift 3 Object-Oriented Programming
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Swift 3 Object-Oriented Programming

Swift 3 Object-Oriented Programming - Second Edition

By : Gaston C. Hillar
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Swift 3 Object-Oriented Programming

Swift 3 Object-Oriented Programming

1 (1)
By: Gaston C. Hillar
Buy this Book

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 (10 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
Lock Free Chapter
1
1. Objects from the Real World to the Playground
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1. Objects from the Real World to the Playground
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Installing the required software on Mac OS
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Installing the required software on Ubuntu Linux
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Working with Swift 3 on the web
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Capturing objects from the real world
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Generating classes to create objects
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Recognizing variables and constants to create properties
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Recognizing actions to create methods
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Organizing classes with UML diagrams
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Working with API objects in the Xcode Playground
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Exercises
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Test your knowledge
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Summary
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2. Structures, Classes, and Instances
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2. Structures, Classes, and Instances
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Understanding structures, classes, and instances
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Understanding initialization and its customization
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Understanding deinitialization and its customization
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Understanding automatic reference counting
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Declaring classes
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Customizing initialization
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Customizing deinitialization
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Creating the instances of classes
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Exercises
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Test your knowledge
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Summary
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3. Encapsulation of Data with Properties
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3. Encapsulation of Data with Properties
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Understanding elements that compose a class
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Declaring stored properties
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Generating computed properties with setters and getters
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Combining setters, getters, and a related property
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Understanding property observers
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Transforming values with setters and getters
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Creating values shared by all the instances of a class with type properties
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Creating mutable classes
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Building immutable classes
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Exercises
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Test your knowledge
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Summary
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4. Inheritance, Abstraction, and Specialization
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4. Inheritance, Abstraction, and Specialization
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Creating class hierarchies to abstract and specialize behavior
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Understanding inheritance
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Declaring classes that inherit from another class
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Overriding and overloading methods
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Overriding properties
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Controlling whether subclasses can or cannot override members
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Working with typecasting and polymorphism
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Taking advantage of operator overloading
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Declaring compound assignment operator functions
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Declaring unary operator functions
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Declaring operator functions for specific subclasses
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Exercises
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Test your knowledge
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Summary
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5. Contract Programming with Protocols
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5. Contract Programming with Protocols
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Understanding how protocols work in combination with classes
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Declaring protocols
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Declaring classes that adopt protocols
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Taking advantage of the multiple inheritance of protocols
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Combining inheritance and protocols
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Working with methods that receive protocols as arguments
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Downcasting with protocols and classes
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Treating instances of a protocol type as a different subclass
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Specifying requirements for properties
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Specifying requirements for methods
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Combining class inheritance with protocol inheritance
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Exercises
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Test your knowledge
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Summary
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6. Maximization of Code Reuse with Generic Code
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6. Maximization of Code Reuse with Generic Code
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Understanding parametric polymorphism and generic code
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Declaring a protocol to be used as a constraint
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Declaring a class that conforms to multiple protocols
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Declaring subclasses that inherit the conformance to protocols
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Declaring a class that works with a constrained generic type
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Using a generic class for multiple types
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Combining initializer requirements in protocols with generic types
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Declaring associated types in protocols
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Creating shortcuts with subscripts
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Declaring a class that works with two constrained generic types
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Using a generic class with two generic type parameters
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Inheriting and adding associated types in protocols
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Generalizing existing classes with generics
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Extending base types to conform to custom protocols
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Test your knowledge
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Exercises
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Summary
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7. Object-Oriented and Functional Programming
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7. Object-Oriented and Functional Programming
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Refactoring code to take advantage of object-oriented programming
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Understanding functions as first-class citizens
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Working with function types within classes
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Creating a functional version of array filtering
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Writing equivalent closures with simplified code
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Creating a data repository with generics and protocols
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Filtering arrays with complex conditions
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Using map to transform values
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Combining map with reduce
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Chaining filter, map, and reduce
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Solving algorithms with reduce
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Exercises
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Test your knowledge
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Summary
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8. Extending and Building Object-Oriented Code
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8. Extending and Building Object-Oriented Code
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Putting together all the pieces of the object-oriented puzzle
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Adding methods with extensions
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Adding computed properties to a base type with extensions
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Declaring new convenience initializers with extensions
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Defining subscripts with extensions
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Working with object-oriented code in iOS apps
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Adding an object-oriented data repository to a project
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Interacting with an object-oriented data repository through Picker View
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Exercises
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Test your knowledge
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Summary
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9. Exercise Answers
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Chapter 1, Objects from the Real World to Playground
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Chapter 2, Structures, Classes, and Instances
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Chapter 3, Encapsulation of Data with Properties
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Chapter 4, Inheritance, Abstraction, and Specialization
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Chapter 5, Contract Programming with Protocols
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Chapter 6, Maximization of Code Reuse with Generic Code
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Chapter 7, Object-Oriented Programming and Functional Programming
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Chapter 8, Protection and Organization of Code

Preface

Object-oriented programming, also known as OOP, is a required skill in absolutely any modern software developer job. It makes a lot of sense because object-oriented programming allows you to maximize code reuse and minimize maintenance costs. However, learning object-oriented programming is challenging because it includes too many abstract concepts that require real-life examples to be easy to understand. In addition, object-oriented code that doesn’t follow best practices can easily become a maintenance nightmare.

Swift is a multiparadigm programming language and one of its most important paradigms is OOP. If you want to create great applications and apps for Mac, iPhone, iPad, Apple TV, and Apple Watch (Mac OS, iOS, tvOS, and watchOS operating systems) you need to master OOP in Swift 3. However, Swift 3 is not limited to Apple platforms and you can take advantage of your Swift 3 knowledge to develop applications that target other platforms and use it for server-side code. In addition, as Swift also grabs nice features found in functional programming languages, it is convenient to know how to mix OOP code with functional programming code.

This book will allow you to develop high-quality reusable object-oriented code in Swift 3. You will learn the OOP principles and how Swift implements them. You will learn how to capture objects from real-world elements and create object-oriented code that represents them. You will understand Swift’s approach towards object-oriented code. You will maximize code reuse and reduce maintenance costs. Your code will be easy to understand and it will work with representations of real-life elements.

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