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Wagner - Learning Swift

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Wagner Learning Swift
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Cover -- Copyright -- Credits -- About the Author -- About the Reviewer -- www.PacktPub.com -- Table of Contents -- Preface -- Chapter 1: Introducing Swift -- Defining our goals for this book -- Setting up the development environment -- Running our first swift code -- Understanding playgrounds -- Learning with this book -- Summary -- Chapter 2: Building Blocks -- Variables, Collections, and Flow Control -- Core Swift types -- Constants and variables -- Containers -- Tuples -- Arrays -- Dictionaries -- Swifts type system -- Printing to the console -- Control flow -- Conditionals -- Switches -- Loops -- Functions -- Basic functions -- Parameterized functions -- Functions that return values -- Functions with default arguments -- Guard statement -- Bringing it all together -- Summary -- Chapter 3: One Piece at a Time -- Types, Scopes, and Projects -- Structs -- Types versus instances -- Properties -- Member and static methods -- Computed properties -- Reacting to property changes -- Subscripts -- Custom initialization -- Classes -- Inheriting from another class -- Initialization -- Overriding initializer -- Required initializer -- Designated and convenience initializers -- Overriding methods and computed properties -- Methods -- Computed properties -- Casting -- Upcasting -- Downcasting -- Enumerations -- Basic declaration -- Testing enumeration values -- Raw values -- Associated values -- Methods and properties -- Projects -- Setting up a command-line Xcode project -- Creating and using an external file -- Interfacing with code from other files -- File organization and navigation -- Extensions -- Scope -- How scope is defined -- Nested types -- Access control -- Summary -- Chapter 4: To Be or Not to Be -- Optionals -- Defining an optional -- Unwrapping an optional -- Optional binding -- Forced unwrapping -- Nil coalescing -- Optional chaining.

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Learning Swift Second Edition

Learning Swift Second Edition

Copyright 2016 Packt Publishing

All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.

Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book.

Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.

First published: June 2015

Second edition: March 2016

Production reference: 1170316

Published by Packt Publishing Ltd.

Livery Place

35 Livery Street

Birmingham B3 2PB, UK.

ISBN 978-1-78588-751-2

www.packtpub.com

Credits

Author

Andrew J Wagner

Reviewer

Guan Gui

Commissioning Editor

Kartikey Pandey

Acquisition Editors

Vivek Anantharaman

Chaitanya Nair

Content Development Editor

Viranchi Shetty

Technical Editor

Saurabh Malhotra

Copy Editors

Kevin McGowan

Sneha Singh

Project Coordinator

Izzat Contractor

Proofreader

Safis Editing

Indexer

Hemangini Bari

Production Coordinator

Shantanu N. Zagade

Cover Work

Shantanu N. Zagade

About the Author

Andrew J Wagner is a software developer who concentrates on iOS development and backend web services. He has a degree in computer engineering from Rensselaer Polytechnic Institute, New York. Currently, he works for a development shop named Chronos Interactive based in Denver, CO. He has experience of working with and for large-scale and small-scale companies, as well as running his own contracting and app companies. He is passionate about using computers as a creative outlet and writing software that is beautiful in implementation, functionality, and experience.

When he isn't working or spending time with friends and family, he writes for his blog at http://drewag.me.

I would like to thank my friends and family for being there for me as support for both my troubles and triumphs. Without their encouragement, I would not have finished this book or achieved any of the other things in my life that make me proud. An especially big thanks to my parents, Fern and Joe, for continually providing me with the tools I need to do the things I love.

About the Reviewer

Guan Gui graduated from the University of Melbourne. He implemented the first system of its kind for beekeepers using satellite sensory data to help them deploy their honeybees better. He is also a big fan of Apple. He started his own open source projectUni Call (unicall.guiguan.net) for OS X. While his research focus is on machine learning, he enjoys the more practical side of CS: developing apps using Swift and JavaScript. Currently, he is trying to set his own start-up. Big ideas to change the world always spin in his head!

www.PacktPub.com
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Preface

This book will help you to get started with Swift in no time. It helps you understand the nuances of iOS programming not only from a conceptual but also from an implementation perspective. This book is an invaluable resource if you are looking forward to exploring the world of iOS application programming.

What this book covers

, Introducing Swift, will take the reader through the process of installing Swift and running their first Swift program, in order to expose its power right away.

, Building Blocks - Variables, Collections, and Flow Control , introduces you to the various built-in mechanisms Swift has for representing complex information in expressive and accessible ways, with the help of a real-world example.

, One Piece at a Time - Types, Scopes, and Projects , introduces the tools necessary to closely model the real world with code. It will teach you how to define your own custom types using structures, classes, and enumerations. It also explores the concept of scope and access control.

, To Be or Not To Be - Optionals , focuses on a special and critical type in Swift, called optionals. It includes a detailed explanation of how optionals work and how they can be used, which turns a seemingly complex topic into a very intuitive concept.

, A Modern Paradigm - Closures and Functional Programming , introduces you to a new way of thinking about code called functional programming. We learn how Swift supports this technique and how we can apply it to our programs to make it even more understandable and expressive.

, Make Swift Work For You - Protocols and Generics , describes what generics and protocols are and how they can provide power and safety at the same time.

, Everything Is Connected - Memory Management , dives deeper into the inner-workings of Swift. We discuss how a computer stores information and how we can use that knowledge in combination with some new tools in Swift, to ensure that our code remains responsive and minimizes its effect on battery life.

, Paths Less Traveled Error Handling , goes into gracefully handling error situations in Swift with error throwing and catching.

, Writing Code the Swift Way - Design Patterns and Techniques , introduces the reader to the art of programming by taking them through a number of specific design patterns that help reduce the complexity of code.

, Harnessing the Past - Understanding and Translating Objective-C , develops a basic understanding of Objective-C with a focus on how it compares to Swift. This allows the reader to make use of the vast resources that exist in Objective-C to help with their Swift development.

, A Whole New World - Developing an App , focuses on explaining the process of creating a real world iOS application, with the help of an example.

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