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Swift in 24 Hours, Sams Teach Yourself

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Swift in 24 Hours, Sams Teach Yourself


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  • Covers powerful new Apple development tools including Photos Framework, Health Kit, and Home Kit, Cloud Kit, and HandOff
  • Teaches through practical instructions, realistic examples, hands-on workshops, Q-and-As, quizzes, exercises, tips, and more
  • Covers Apple's hottest new development technology: in just the first day after Apple announced Swift, 370,000+ developers downloaded its introductory iBook!


  • Copyright 2015
  • Edition: 1st
  • Book
  • ISBN-10: 0-672-33724-X
  • ISBN-13: 978-0-672-33724-6

In just 24 lessons of one hour or less, Sams Teach Yourself Swift in 24 Hours helps you build next-generation OS X and iOS apps with Apple’s new Swift programming language.

This book’s straightforward, step-by-step approach helps you quickly master Swift’s core concepts, structure, and syntax and use Swift to write safe, powerful, modern code. In just a few hours you’ll be applying advanced features such as extensions, closures, protocols, and generics. Every lesson builds on what you’ve already learned, giving you a rock-solid foundation for real-world success.

Step-by-step instructions carefully walk you through the most common Swift development tasks.
Practical, hands-on examples show you how to apply what you learn.
Quizzes and exercises help you test your knowledge and stretch your skills.
Notes and tips point out shortcuts and solutions.

Learn how to...

  • Set up your Swift development environment
  • Master Swift’s fundamental data types and operators
  • Make the most of arrays and dictionaries
  • Control program flow, modify execution paths, and iterate code
  • Perform complex actions with functions
  • Work with higher-order functions and closures
  • Harness the power of structs, enums, classes, and class inheritance
  • Customize initializers of classes, structs, and enums
  • Implement instance methods, type methods, and advanced type functionality
  • Take full advantage of Swift’s advanced memory allocation
  • Extend type functionality with protocols and extensions
  • Leverage the power of generics, chaining, and other advanced features
  • Interoperate with Objective-C code
  • Interact with user interfaces
  • Take advantage of Swift’s Standard Library features and functions
Who Should Read this Book
  • Beginner-intermediate level programmers
  • Advanced programmers who are not yet familiar with Swift can benefit


Related Article

Building iOS Applications with Swift: A Q&A with BJ Miller

Author's Site

Please visit the author's site here

Read the author's blog post on Swift Version 1.1 here

Companion Site

Download the sample files for this book here.

Sample Content

Online Sample Chapter

Introducing the Swift Development Environment


Video: The Current State of Swift Development with iOS Developer and Author BJ Miller

Sample Pages

Download the sample pages (includes Chapter 1 and Index)

Table of Contents

Introduction     xv
HOUR 1: Introducing the Swift Development Environment     1

What Is Swift?      2
Getting Started     2
Summary     9
Q&A     10
Workshop     10
Exercise     11
HOUR 2: Learning Swift’s Fundamental Data Types     13
Constants in Swift     13
Variables in Swift      14
Introducing Data Types     15
Summary     23
Q&A     24
Workshop     24
Exercise     25
HOUR 3: Using Operators in Swift     27
Unary Operators     27
Binary Operators     29
Ternary Conditional Operators     35
Summary     35
Q&A     36
Workshop     36
Exercise     37
HOUR 4: Working with Collection Types     39
Arrays     39
Dictionaries     46
Tuples     50
Summary     51
Q&A     51
Workshop     52
Exercise     52
HOUR 5: Understanding Optional Values     53
What Are Optional Values?      53
How to Designate a Variable as Optional      54
Wrapping and Unwrapping Optional Variables     54
Use Case for Optionals     58
Summary     61
Q&A     62
Workshop     62
Exercise     63
HOUR 6: Controlling Program Flow with Conditionals     65
The if Statement      65
The switch Statement      70
Summary     77
Q&A     78
Workshop     78
Exercise     80
HOUR 7: Iterating Code with Loops     81
Two Categories of Loops     81
Transferring Control in Loops     93
Summary     95
Q&A     95
Workshop     96
Exercise     97
HOUR 8: Using Functions to Perform Actions     99
The Nature of Functions in Swift     100
General Function Syntax and Structure     100
Functions with No Parameters and No Return Type     102
The Type of a Function     102
Functions with Parameters     103
Functions with Variadic Parameters     105
Functions with Return Types     106
External Parameter Names     111
Default Parameter Values     112
Change Argument Values with In-Out Parameters     112
Summary     113
Q&A     114
Workshop     114
Exercise     115
HOUR 9: Understanding Higher Order Functions and Closures     117
Higher Order Functions     117
Closures     124
Summary     132
Q&A     133
Workshop     133
Exercise     135
HOUR 10: Learning About Structs and Classes     137
Overview of Structs and Classes in Swift     137
What Swift Structs and Classes Have in Common     139
Differences Between Structs and Classes     147
When to Use a Class or a Struct     150
Summary     151
Q&A     151
Workshop     152
Exercise     153
HOUR 11: Implementing Class Inheritance     155
What Is Inheritance?      155
Identifying a Base Class     156
Creating a Subclass     157
Overriding Inherited Methods     159
Accessing super     162
Preventing Overrides     164
Class Identity     166
Summary     167
Q&A     168
Workshop     169
Exercise     170
HOUR 12: Harnessing the Power of Enums     171
Understanding Swift Enums     171
Swift Enum Structure     172
Raw Values     173
Enum Shorthand Syntax     175
Associated Values     177
Switching Enum Values     178
Adding Instance Methods to Enums     180
Summary     182
Q&A     183
Workshop     183
Exercise     184
HOUR 13: Customizing Initializers of Classes, Structs, and Enums     185
Initialization     185
Initializing Value Types     187
Advanced Initialization     193
Summary     201
Q&A      202
Workshop     202
Exercise     203
HOUR 14: Digging Deeper with Properties     205
Stored Properties     206
Computed Properties     209
Property Accessors     209
Property Observers     212
Inheriting and Overriding Accessors     215
Inheriting and Overriding Observers     217
Summary     221
Q&A     221
Workshop     222
Exercise     222
HOUR 15: Adding Advanced Type Functionality     223
Type Properties and Methods     223
Type Aliasing     229
Type Access Control     230
Subscripts     231
Type Casting and Non-Specific Types     235
Summary     239
Q&A     239
Workshop     240
Exercise     241
HOUR 16: Understanding Memory Allocation and References     243
Deinitialization     243
Automatic Reference Counting     247
Summary     259
Q&A     260
Workshop     261
Exercise     261
HOUR 17: Using Protocols to Define Behavior     263
Defining Protocols     263
Creating and Adopting Protocols     264
Properties     265
Defining Methods in Protocols     266
Using Protocol Names as Types     268
Adopting and Inheriting Multiple Protocols     269
Optional Protocol Properties and Methods     273
How to Check for Protocol Conformance     275
Using Protocols for Delegation     275
Summary     280
Q&A     281
Workshop     282
Exercise     282
HOUR 18: Using Extensions to Add Type Functionality     285
Defining Extensions     285
Adding Functionality with Extensions     287
Summary     297
Q&A     297
Workshop     298
Exercise     298
HOUR 19: Working with Optional Chaining     301
Defining Optional Chaining     301
Chaining Optional Properties     302
Subscripts     303
Methods     308
Summary     310
Q&A     311
Workshop     311
Exercise     312
HOUR 20: Introducing Generics     313
An Introduction to Generics     313
Type Parameters and Placeholder Types     314
Specifying Type Constraints     315
Creating Generic Types     319
Extending Generic Types     322
Using Associated Types in Protocols     323
Summary     325
Q&A     326
Workshop     326
Exercise     327
HOUR 21: Adding Interoperability with Objective-C     329
Objective-C Basics     329
Bridging     335
Integrating Swift into an Objective-C App     337
Summary     346
Q&A     347
Workshop     348
Exercise     348
HOUR 22: Interacting with User Interfaces     351
Interface Introduction     351
Interface Definitions     352
Building an Interface     353
Creating Your Own Project     355
Adding UI Elements     355
Summary     369
Q&A     370
Workshop     370
Exercise     371
HOUR 23: Asynchronous Programming in Swift     373
The Problem That Concurrency Solves     373
Different Types of Queues     374
Asynchronous Programming in Action     376
Add iTunes Search to Songs App     380
Parsing JSON     383
Summary     390
Q&A     390
Workshop     391
Exercise     392
HOUR 24: Learning Swift’s Standard Library Functions     393
What Is a Standard Library?      393
Numeric Types     394
String Type     394
Protocols     395
Functional Functions     399
Global Functions     401
Summary     404
Q&A     405
Workshop     405
Exercise     406
Index     409


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