Learn iOS 11 Programming with Swift 4

794 Pages·2018·77.073 MB·English

by  Clayton, Craig

Learn iOS 11 Programming CL Craig Clayton
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You want to build iOS applications Things you will learn: 1
1
but where do you start? Forget sifting
P
through tutorials and blog posts, this book
r
is a direct route into iOS development, • Get to grips with Swift 4 and o
Learn iOS 11
taking you through the basics and Xcode 9, the building blocks g
showing you how to put the principles of Apple development r
a
into practice. So take advantage of this m
developer-friendly guide and start building
applications that may just take the App • Get to know the fundamentals of m
Programming
Store by storm! Swift 4, including strings, variables, i
n
constants, and control fl ow
g
Whether you're an experienced
w
programmer or a complete novice, this
• Discover the distinctive design i
book guides you through every facet of t
principles that defi ne the iOS user h with Swift 4
iOS development. From Xcode and Swift,

experience S
the building blocks of modern iOS
w
development, you'll quickly gain a solid
foundation to begin venturing deeper into • Build a responsive UI and add privacy if
t
your development journey. Experienced
to your custom-rich notifi cations 4
programmers can jump right in and learn
Second Edition
the latest iOS 11 features. -

S
• Preserve data and manipulate e
You'll also learn advanced topics of iOS images with fi lters and effects c
design, such as gestures and animations, to o
n
give your app the edge. Explore the latest
d
developments in Swift 4 and iOS 11 by • Bring in SiriKit to create payment

incorporating new features, custom-rich requests inside your app E Learn the fundamentals of iOS app development with
notifi cations, drag and drop features, and d
the latest developments in SiriKit. With it Swift 4 and Xcode 9
further guidance on beta testing with • Collect valuable feedback with io
TestFlight, you'll quickly learn everything TestFlight before you release n
you need to get your project on the App your apps on the App Store
Store!
www.packtpub.com
Learn iOS 11 Programming
with Swift 4
Second Edition
Learn the fundamentals of iOS app development with Swift 4
and Xcode 9
Craig Clayton
BIRMINGHAM - MUMBAI
Learn iOS 11 Programming with Swift 4
Second Edition
Copyright © 2018 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 or its dealers and distributors, will be held liable for any damages caused or alleged to
have been 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.
Acquisition Editor: Reshma Raman
Content Development Editor: Vikas Tiwari
Technical Editor: Madhunikita Sunil Chindarkar
Copy Editor: Muktikant Garimella
Project Coordinator: Ulhas Kambali
Proofreader: Safis Editing
Indexer: Tejal Daruwale Soni
Graphics: Jason Monteiro, Tom Scaria
Production Coordinator: Shantanu N. Zagade
First published: December 2016
Second edition: January 2018
Production reference: 1290118
Published by Packt Publishing Ltd.
Livery Place
35 Livery Street
Birmingham
B3 2PB, UK.
ISBN 978-1-78839-075-0
www.packtpub.com
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Contributors
About the author
Craig Clayton is a self-taught, senior iOS engineer at Adept Mobile specializing in building
mobile experiences for NBA and NFL teams. He also volunteers as the organizer of the
Suncoast iOS meetup group in the Tampa/St. Petersburg area, and prepares presentations
and hands-on talks for this group and other groups in the community. He has also launched
Cocoa Academy online, which specializes in bringing a diverse list of iOS courses ranging
from building apps to games for all programming levels.
About the reviewer
Cecil Costa, also known as Eduardo Campos in Latin countries, is a Euro-Brazilian
freelance developer. He has been giving onsite courses for companies such as Ericsson,
Roche, TVE (a Spanish TV channel), and others. He has also worked for different
companies, including IBM, Qualcomm, Spanish Lottery, and Dia. He is also the author of
Swift Cookbook, Swift 2 Blueprints, Reactive Programming with Swift, and a video course called
Building iOS 10 Applications with Swift, by Packt Publishing.
Packt is searching for authors like you
If you're interested in becoming an author for Packt, please visit authors.packtpub.com and
apply today. We have worked with thousands of developers and tech professionals, just
like you, to help them share their insight with the global tech community. You can make a
general application, apply for a specific hot topic that we are recruiting an author for, or
submit your own idea.
Table of Contents
Preface
1
Chapter 1: Getting Familiar with Xcode
7
Getting started 8
The Xcode interface 13
Navigator panel 14
Standard editor 14
Utilities panel 15
Debug panel 15
Toolbar 15
Generic iOS device 18
iOS device 18
Connecting wirelessly 23
Window pane controls 25
Summary 27
Chapter 2: Building a Foundation with Swift
28
Playgrounds – an interactive coding environment 29
Data types – where it all starts 32
String 32
Integer data type 33
Floating-point numbers 34
Booleans 34
Variables and constants – where data is held 35
Creating a variable with a string 35
Creating a variable with an integer (Int) 36
Debug and print() – detecting your bugs 36
Adding floating-point numbers 37
Creating a Boolean 39
Hungarian notation 40
Why constants versus variables? 41
Comments – leaving yourself notes or reminders 41
Type safety and type inference 42
Concatenating strings 42
String interpolation 43
Operations with our integers 44
Table of Contents
Increment and decrement 46
Comparison operators 47
Summary 47
Chapter 3: Building on the Swift Foundation
48
Creating a Playground project 49
The if statements – having fun with logic statements 50
Optionals and optional bindings 57
Why optionals? 62
Functions 63
Summary 72
Chapter 4: Digging Deeper
73
Creating a Playground project 74
Ranges 75
Closed range 75
Half-closed range 77
Control flow 78
The for...in loop 79
One-sided range 83
The while loop 84
The repeat...while loop 87
Summary 89
Chapter 5: Digging into Collections
90
Arrays 90
Creating an empty array 91
Creating an array with initial values 92
Creating a mutable array 92
Adding items to an array 93
Checking the number of elements in an array 98
Checking for an empty array 99
Retrieving a value from an array 100
Iterating over an array 104
Removing items from an array 105
Dictionaries 109
Creating a dictionary 109
Adding and updating dictionary elements 111
Accessing an item in a dictionary 115
Iterating over dictionary values 116
[ ii ]
Table of Contents
Iterating over dictionary keys 117
Iterating over dictionary keys and values 117
Checking the number of items in a dictionary 118
Removing items from a dictionary 121
Sets 123
Creating an empty set 124
Creating a set with an array literal 124
Creating a mutable set 125
Adding items into a set 125
Checking if a set contains an item 127
Iterating over a set 128
Intersecting two sets 131
Joining two sets 133
Removing items from a set 134
Summary 137
Chapter 6: Starting the UI Setup
138
Useful terms 139
View Controller 139
Table View Controller 139
Collection View Controller 140
Navigation Controller 141
Tab Bar Controller 142
Storyboard 143
Segue 144
Auto Layout 144
Model View Controller (MVC) 144
App tour 145
Explore tab 145
Locations 147
Restaurant listings 147
Restaurant detail 149
Map tab 150
Project setup 151
Creating a new project 151
Summary 154
Chapter 7: Setting Up the Basic Structure
155
Starting from scratch 155
Storyboard setup 157
[ iii ]
Table of Contents
Adding our app assets 161
Storyboards 174
Creating our launch screen 175
Adding a Navigation Controller 184
Summary 188
Chapter 8: Building Our App Structure in Storyboard
189
Adding a Collection View Controller 192
Hooking up our outlets 195
Creating a custom color 201
Setting up our cell 205
Section header 207
Updating the grid 211
Adding a modal 213
Updating Bar Button Items 221
Unwinding our Cancel button 222
Adding our first Table View 223
Summary 224
Chapter 9: Finishing Up Our App Structure in Storyboard
225
Adding our Restaurant List View 226
Hooking up our outlets 226
Setting up our cell 227
Adding Reviews View 235
Viewing reviews 237
Map Kit View 240
Summary 245
Chapter 10: Designing Cells
246
Setting up the Explore header 246
Adding Auto Layout to the Explore header 251
Setting up the Explore cell 253
Adding Auto Layout to the Explore cell 255
Setting up the Restaurant cell 256
Adding Auto Layout to the Restaurant cell 260
Location cell 263
Summary 264
Chapter 11: Designing Static Tables
265
Setting up cells 266
Creating our section headers 267
[ iv ]