iPhone and iPad Apps for Absolute Beginners (eBook)

Rory Lewis is assistant professor of computer science at the University of Colorado at Colorado Springs. He is often mistaken for a hippie, wearing Dead-head shirts and walking aimlessly around the campus. He is often described as the guy in the office where students are always lined up outside. He is often heralded as the dude that will explain your math and computer code, even when he first checks and sees you ve done 800 tweets and 2,700 Facebook comments while you should have been in class! He is described by his adult daughters as a dad that was once a successful microprocessor litigation lawyer in Palo Alto, but couldn t resist his dorkiness and went back to school to become a doctor of geekdom!

Contents at a Glance 5
Table of Contents 6
Foreword: About the Author 10
Why you’ll relate to Dr. Lewis 10
Fast-Forward 17 Years 10
Past—Present—Future 11
Why Write This Book? 11
About the Contributing Authors 13
About the Technical Reviewer 14
Acknowledgments 15
Preface 16
What This Book Will Do For You 16
The Approach I Take 17
Chapter 1 Before We Get Started 18
Necessities and Accessories 18
What I Won’t Teach You 23
Computer Science: A Broad and Diverse Landscape 23
Why Purgatory Exists In Objective-C 24
Houston, We Have a Problem 24
How We’ll Visit Purgatory Every Now and Again 25
Looking Forward … Beginning iPhone 3 Development: Exploring the iPhone SDK 25
What You Will Learn 26
Creating Cool and Wacky Apps: Why I Teach This Way 26
Evangelizing to Your Grandmother … What You Coded Is Crucial! 27
How Does This All Work? 27
Our Road Map: Using Xcode and Interface Builder 29
Getting Ready For Your First iPhone/iPad Project 29
The Accompanying Screencasts 31
The Accompanying PDFs 32
Pretending Not to Know: The Art of De-Obfuscation 32
How We’ll Travel Through Each Step 32
Chapter 2: Blast-Off! 33
helloWorld_002 – a Navigation-based Application 54
helloWorld_003 – Modifying a Navigation-based App 64
Chapter 3: What’s Next? 69
§I: THE ROAD AHEAD 70
Introducing Chapter 4—An Introduction to the Code 70
Introducing Chapter 5—Buttons & Labels with Multiple Graphics
Introducing Chapter 6—Switch View with Multiple Graphics 72
Introducing Chapter 7—Dragging, Rotating, and Scaling 74
Introducing Chapter 8—Table Views, Navigation, and Arrays 75
Introducing Chapter 9—MapKit 76
§II: THE iPHONE AND THE iPAD 76
Do Apps Run on Both the iPad and the iPhone? 77
More Screen Space 78
Master-Detail 80
User Interface on iPad 80
Checking the Platform 81
Compatibility 81
§III: A LOOK UNDER THE HOOD 82
You’ve Said “Hello!” … but now, INDIO! 83
Model-View-Controller 83
Chapter 4: An Introduction to the Code 86
004_helloWorld: Buttons with Graphics 87
Digging the Code 104
Nibs, Zibs, and Xibs 104
Methods 105
Chapter 5: Buttons & Labels with Multiple Graphics
helloWorld_005: a View-Based Application 108
Preliminaries 109
Xcode – Beginning a New Project 112
Understanding IBOutlets 114
Pointers 116
Properties: Management & Control
Adding IBActions 120
Coding the Implementation File 121
Providing for Synthesis 123
Interface Builder: Making the Connections 125
Final Step: File’s Owner & uiImageView
Digging the Code 137
IBOutlets and IBActions 137
More About Pointers 138
In the Chapter Ahead 139
Chapter 6: Switch View with Multiple Graphics 140
einSwitch_001—a Window-Based Application 143
Preliminaries 143
Name your Project “einSwitch01” 148
Create the 1st UIViewController Subclass 152
Create the Ein1Controller 153
Check Header and Implementation Files 154
Create the Ein2Controller 154
Make Sure Images Are Embedded 155
Save Einstein2View.xib 156
Drag the Images into Xcode 157
Assign your Icon in the “plist” 158
Code the AppViewDelegate 159
Working SwitchView 161
SwitchViewController and AppDelegate 163
SwitchViewController Header File 167
Ready for Lazy Load—Implementation File 170
A Note about Comments and Lazy Loads 171
Copy Contents of SwitchViewController.txt 173
A Note about Apple’s Boilerplate Implementation File 174
Working on the .xib Files 176
Select the File’s Owner 178
Drag a View onto the Screen 178
Start Working on the Einstein#View.xib Files 182
Repeat Process for Second Image 186
einSwitch_002—a Tab-Bar Application 191
einSwitch_003—a Window-Based Application 206
Digging … Your Brain 222
Chapter 7: Dragging, Rotating, and Scaling 223
DragRotateAndScale—a View-Based Application 224
Preliminaries 225
Starting the DragRotateAndScale App 225
Creating a Custom UIImageView Subclass 227
Overriding – initWithImage in TransformView.m 229
Creating Touch-Handling Stubs 230
Translating in touchesMoved 232
Making Use of TransformView 234
Creating a TransformView 234
Preparing TransformView for Rotation and Scaling 239
Helper Methods 240
Adding to “-touchesBegan” 241
Modifying -touchesMoved 243
Digging the Code 246
Gesture Support and the iPad 247
Chapter 8: Table Views, Navigation, and Arrays 249
How Shall We Proceed? 252
Table Views and Navigation Stacks 252
Food: Following the App Store Model 253
Starting the Food App 253
Adding the Category Names Array in RootViewController.h 255
Creating the Categories Array in -viewDidLoad 256
Setting Up Table View Data Source Methods 257
Table View Delegation 258
Setting up FoodTableViewController 259
Creating the Convenience Constructor for the FoodTableViewController 262
Data Source and Delegation for the FoodTableViewController 263
Creating the FoodViewController Class 264
The FoodViewController Header File 265
The FoodViewController Convenience Constructor 266
Setting Up FoodViewController, -viewDidLoad, and the (.xib) 266
Icon File 268
Testing the App 269
Digging the Code 271
Memory Management 271
Reuse Identifiers 273
Chapter 9: MapKit 274
A Little about Frameworks 275
Important Things to Know 276
Preinstalled MapKit Apps 276
Find Locations 277
Get Directions 278
See Which Way You’re Facing 279
See Traffic 280
Search for a Location 281
Change Your View 282
Cool and Popular MapKit Apps to Inspire You 283
MapKit_01: A View-Based Application 284
Possible Prepping for the App 284
Preliminaries 286
A New View-Based Template 286
Adding the Annotation File 287
It’s Already Working! 288
Check It Out—the iPad Simulator 289
Make It Look a Little Bit Better 290
Dealing with the Implementation 291
Coding the myPos.h File 297
The myPos.m File 298
The AppDelegate Files 299
Connect MapView with MKMapView 300
Digging My Students’ MapKit Code 303
Parsing to MapKit from the Internet 303
MapKit Parsing 306
Three MapKit Final Projects: CS-201 iPhone Apps, Objective-C 308
Final Project—Example 2 317
Biographical Info—Example 3, Satish Rege 320
Zoom Out … Seeing the Big Picture 323
Index 325