iOS 9 by Tutorials: Learning the new iOS 9 APIs with Swift 2

297 Pages·2016·50.29 MB·English

by  Ahmad J.

iOS 9 by Tutorials

By the raywenderlich.com Tutorial Team

Jawwad Ahmad, Soheil Azarpour, Caroline Begbie,
Evan Dekhayser, Aaron Douglas, James Frost, Vincent Ngo,
Pietro Rea, Derek Selander, & Chris Wagner

Copyright © 2015 Razeware LLC.

All rights reserved. No part of this book or corresponding materials (such as
text, images, or source code) may be reproduced or distributed by any means
without prior written permission of the copyright owner.
This book and all corresponding materials (such as source code) are provided
on an "as is" basis, without warranty of any kind, express or implied, including
but not limited to the warranties of merchantability, fitness for a particular
purpose, and noninfringement. In no event shall the authors or copyright
holders be liable for any claim, damages or other liability, whether in action of
contract, tort or otherwise, arising from, out of or in connection with the
software or the use or other dealings in the software.
All trademarks and registered trademarks appearing in this book are the
property of their respective owners.
Dedications

"To my parents, my wife, and two daughters,
for their support and encouragement."
— Jawwad Ahmad
"To my lovely, always supportive wife Elnaz, our son Kian and my parents."
— Soheil Azarpour
"To Ken who always encouraged me not to get a real job. Also to my weird
and wonderful children Robin and Kayla - love you both!"
— Caroline Begbie
"To my parents, for funding and supporting my expensive hobby."
— Evan Dekhayser
"To my husband, Mike, and my parents - all whom have inspired me
to do my best and keep plugging away throughout the years."
— Aaron Douglas
"To my wonderful, ever-patient wife Hannah, and our son Rupert,
who amazes me every day."
— James Frost
"To my parents and sister for always encouraging, and helping me
along my journey. I ♥ you guys so much!"
— Vincent Ngo
"To my wife Emily and my father Aldo."
— Pietro Rea
"Thanks to Brittany & our doggie, Squid, for all the love and support...
as well as constantly licking me when I sleep."
— Derek Selander
"To my beautiful wife Sam, our ever curious son Hayden,
and most recent addition to the family Ryland."
— Chris Wagner
About the authors
Jawwad Ahmad is a freelance iOS Developer that dove into
Swift head first and has not looked back. He enjoys mentoring
and teaching and was the original founder of the of the NYC
iOS Study Group. He's worked for companies as large as The
New York Times, and as small as GateGuru, a 6 person
startup.

Soheil Azarpour is an engineer, developer, author, creator,
husband and father. He enjoys bicycling, boating and playing
piano. He lives in Manchester, NH. Soheil creates iOS apps
professionally and independently.

Caroline Begbie is an indie iOS developer and likes to relax
with animation software, Arduino and electronics. In her
previous life she taught the elderly how to use their
computers, performed marionette shows in schools, and ran a
software company in Silicon Valley.

Evan Dekhayser is a high school student, as well as an iOS
developer. He first learned Python in 2012, and has since built
up his knowledge of Objective C and Swift. He enjoys playing
and watching baseball, and is always looking for intriguing
topics to learn and potentially write about.

Aaron Douglas was that kid taking apart the mechanical and
electrical appliances at five years of age to see how they
worked. He took an early interest in computer programming,
figuring out how to get past security to play games on his
dad's computer. He's still that feisty nerd, but at least now he
gets paid to do it. Aaron works for Automattic
(WordPress.com, Akismet, SimpleNote) as a Mobile Maker.

Twitter: @astralbodies Blog: http://astralbodi.es
James Frost is a senior iOS developer at Mubaloo Ltd, and
lives in Bristol, UK. He taught himself to code in the early 90s
on his family's BBC B, and was instantly hooked. He loves
learning new things and teaching others, and enjoys spending
time with his wife and son, reading, playing games, and
cooking. You can find him on his blog at:
http://www.jamesfrost.co.uk or as @frosty on Twitter.

Vincent Ngo is a full time iOS software engineer at IBM. He
graduated from Virginia Tech with a Computer Science degree.
He has passion for developing, sharing, and learning about
what's new with the iOS SDK. On the side he loves playing
video games, strumming his guitar, hitting golf balls, and
chilling with friends.

Pietro Rea is a software engineer at Quidsi, where he builds
e-commerce iOS applications for Diapers.com, Wag.com,
Soap.com and 7 other brands. Previously, he's worked on the
Huffington Post's mobile team. You can find Pietro on Twitter
as @pietrorea.

Derek Selander is an iOS developer who enjoys learning
through debugging & disassembly to see how others have
solved similar problems. In his free time, he enjoys surfing,
playing classical guitar, and consuming bacon.

Chris Wagner leads iOS development at Infusionsoft and has
been developing for iOS since the release of the SDK in 2009.
His background consists of gaming, customer support,
systems administration and web development. When he's not
working he enjoys spending time with his wife and son. By the
time this is published our second son will have arrived!
About the editors
James Frost was a technical editor for this book. He is a
senior iOS developer at Mubaloo Ltd, and lives in Bristol, UK.
He taught himself to code in the early 90s on his family's BBC
B, and was instantly hooked. He loves learning new things and
teaching others, and enjoys spending time with his wife and
son, reading, playing games, and cooking. You can find him on
his blog at: jamesfrost.co.uk or as @frosty on Twitter.

Jeff Rames was a technical editor for this book. He is a
developer currently working at AirStrip where he builds
enterprise iOS products in the healthcare space. He discovered
his passion for mobile software shortly after the iPhone SDK
was released, and made it his full time gig in 2011 after a
decade in the industry. He spends his free time with his wife
and daughters, except when he abandons them for trips to

Cape Canaveral to watch rockets being launched into space.

Richard Turton was a technical editor for this book. He is an
iOS developer for MartianCraft, prolific Stack Overflow
participant and author of a development blog, Command Shift.
When he's not in front of a computer he is usually building
Lego horse powered spaceships (don't ask!) with his daughter.

Chris Belanger was an editor for this book. He spends his
days developing real-time industrial control applications; he
fills the rest of his time with writing, editing, travelling,
composing music, enjoying the great outdoors and
appreciating the finer things in life. He's excited to have
worked on yet another book with the raywenderlich.com team
and can't imagine life without this crazy, wonderful bunch.
Wendy Lincoln was an editor for this book. By day, she
manages complex content development projects and by night
she escapes into the world of iOS. Before all this, she
produced a cooking show named Hot Kitchen, wrote a
cookbook and taught cooking classes. A few years ago she
realized her love for writing, editing and playing with
computers; she's never looked back. Once in a while, her

husband manages to tear her away from the computer for
trips to the beach and random home improvement projects.
Sam Davies was the final pass editor for this book. Sam is a
strange mashup of developer, writer and trainer. By day you'll
find him recording videos for Razeware, writing tutorials,
attending conferences and generally being a good guy. By
night he's likely to be out entertaining people, armed with his
trombone and killer dance moves.
He'd like it very much if you were to say "hi" to him on twitter
at @iwantmyrealname.

About the artist
Julien Martin was the artist for the book. After years
working in print, Julien discovered an unquenchable passion
for icon and interface design while working with startups in
New York City. Back home in France, he has since designed
multiple successful and award-winning mobile apps for
established businesses, entrepreneurs and passionate
individuals who value the importance of great design. You can

get in touch via http://julien.design.
iOS 9 by Tutorials
Table of Contents: Overview
Introduction................................................................................ 13
Chapter 1: Swift 2.0............................................................... 21
Chapter 2: Introducing App Search..................................... 41
Chapter 3: Your App on the Web........................................ 60
Chapter 4: App Thinning........................................................ 79
Chapter 5: Multitasking.......................................................... 96
Chapter 6: 3D Touch............................................................. 109
Chapter 7: UIStackView & Auto Layout changes ........... 126
Chapter 8: Intermediate UIStackView.............................. 145
Chapter 9: What's New in Storyboards?......................... 166
Chapter 10: Custom Segues ............................................... 185
Chapter 11: UIKit Dynamics................................................ 205
Chapter 12: Contacts........................................................... 222
Chapter 13: Testing .............................................................. 239
Chapter 14: Location and Mapping ................................. 258
Chapter 15: What's New in Xcode?.................................. 276
Conclusion ............................................................................... 297
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iOS 9 by Tutorials
Table of Contents: Extended
Introduction................................................................................ 13
What you need.................................................................................................................. 14
Who this book is for.......................................................................................................... 14
How to use this book......................................................................................................... 15
Book overview.................................................................................................................... 15
Book source code and forums......................................................................................... 19
Book Updates..................................................................................................................... 19
License.................................................................................................................................. 19
Acknowledgments.............................................................................................................. 20
Chapter 1: Swift 2.0............................................................... 21
Whither Swift?.................................................................................................................... 21
The Real "One more thing".............................................................................................. 21
What Makes Swift, "2.0"?............................................................................................... 22
The Logistics........................................................................................................................ 22
Control Flow........................................................................................................................ 23
Error handling..................................................................................................................... 25
The Project........................................................................................................................... 27
Additional Things............................................................................................................... 35
Where to go from here?.................................................................................................. 40
Chapter 2: Introducing App Search..................................... 41
App search APIs................................................................................................................. 41
Getting started.................................................................................................................. 43
Searching previously viewed records............................................................................ 44
Indexing with Core Spotlight........................................................................................... 51
Private vs. public indexing............................................................................................... 56
Advanced features............................................................................................................ 57
Where to go from here?.................................................................................................. 58
Chapter 3: Your App on the Web........................................ 60
Getting started.................................................................................................................. 60
Linking to your app........................................................................................................... 62
Working with web markup.............................................................................................. 71
Where to go from here?.................................................................................................. 77
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iOS 9 by Tutorials
Chapter 4: App Thinning........................................................ 79
Getting started.................................................................................................................. 80
Slicing up app slicing........................................................................................................ 83
Being smart with resources............................................................................................... 84
Lazily (down)loading content........................................................................................... 86
Make it download faster.................................................................................................. 89
The many flavors of tagging........................................................................................... 91
Purging content................................................................................................................... 93
Where to go from here?.................................................................................................. 94
Chapter 5: Multitasking.......................................................... 96
Getting started.................................................................................................................. 96
Preparing your app for multitasking............................................................................. 98
Orientation and size changes.......................................................................................... 98
Adaptive presentation ................................................................................................... 103
Other considerations....................................................................................................... 107
Where to go from here?................................................................................................ 108
Chapter 6: 3D Touch............................................................. 109
Getting started................................................................................................................ 110
UITouch force.................................................................................................................... 111
Peeking and popping..................................................................................................... 113
Home screen quick actions............................................................................................. 119
Where to go from here?................................................................................................ 125
Chapter 7: UIStackView & Auto Layout changes ........... 126
Getting started................................................................................................................ 127
Your first stack view........................................................................................................ 130
Layout anchors................................................................................................................. 136
Layout guides................................................................................................................... 140
Fixing the alignment bug............................................................................................... 140
Where to go from here?................................................................................................ 144
Chapter 8: Intermediate UIStackView.............................. 145
Getting started................................................................................................................ 145
Converting the sections................................................................................................... 146
Alignment.......................................................................................................................... 151
Convert the weather section.......................................................................................... 152
Animation.......................................................................................................................... 162
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