- •Contents at a Glance
- •About the Authors
- •About the Technical Reviewer
- •Acknowledgments
- •Preface
- •What This Book Is
- •What You Need
- •Developer Options
- •What You Need to Know
- •What’s Different About Coding for iOS?
- •Only One Active Application
- •Only One Window
- •Limited Access
- •Limited Response Time
- •Limited Screen Size
- •Limited System Resources
- •No Garbage Collection, but…
- •Some New Stuff
- •A Different Approach
- •What’s in This Book
- •What’s New in This Update?
- •Are You Ready?
- •Setting Up Your Project in Xcode
- •The Xcode Workspace Window
- •The Toolbar
- •The Navigator View
- •The Jump Bar
- •The Utility Pane
- •Interface Builder
- •New Compiler and Debugger
- •A Closer Look at Our Project
- •Introducing Xcode’s Interface Builder
- •What’s in the Nib File?
- •The Library
- •Adding a Label to the View
- •Changing Attributes
- •Some iPhone Polish—Finishing Touches
- •Bring It on Home
- •The Model-View-Controller Paradigm
- •Creating Our Project
- •Looking at the View Controller
- •Understanding Outlets and Actions
- •Outlets
- •Actions
- •Cleaning Up the View Controller
- •Designing the User Interface
- •Adding the Buttons and Action Method
- •Adding the Label and Outlet
- •Writing the Action Method
- •Trying It Out
- •Looking at the Application Delegate
- •Bring It on Home
- •A Screen Full of Controls
- •Active, Static, and Passive Controls
- •Creating the Application
- •Implementing the Image View and Text Fields
- •Adding the Image View
- •Resizing the Image View
- •Setting View Attributes
- •The Mode Attribute
- •Interaction Checkboxes
- •The Alpha Value
- •Background
- •Drawing Checkboxes
- •Stretching
- •Adding the Text Fields
- •Text Field Inspector Settings
- •Setting the Attributes for the Second Text Field
- •Creating and Connecting Outlets
- •Closing the Keyboard
- •Closing the Keyboard When Done Is Tapped
- •Touching the Background to Close the Keyboard
- •Adding the Slider and Label
- •Creating and Connecting the Actions and Outlets
- •Implementing the Action Method
- •Adding Two Labeled Switches
- •Connecting and Creating Outlets and Actions
- •Implementing the Switch Actions
- •Adding the Button
- •Connecting and Creating the Button Outlets and Actions
- •Implementing the Segmented Control Action
- •Implementing the Action Sheet and Alert
- •Conforming to the Action Sheet Delegate Method
- •Showing the Action Sheet
- •Spiffing Up the Button
- •Using the viewDidLoad Method
- •Control States
- •Stretchable Images
- •Crossing the Finish Line
- •The Mechanics of Autorotation
- •Points, Pixels, and the Retina Display
- •Autorotation Approaches
- •Handling Rotation Using Autosize Attributes
- •Configuring Supported Orientations
- •Specifying Rotation Support
- •Designing an Interface with Autosize Attributes
- •Using the Size Inspector’s Autosize Attributes
- •Setting the Buttons’ Autosize Attributes
- •Restructuring a View When Rotated
- •Creating and Connecting Outlets
- •Moving the Buttons on Rotation
- •Swapping Views
- •Designing the Two Views
- •Implementing the Swap
- •Changing Outlet Collections
- •Rotating Out of Here
- •Common Types of Multiview Apps
- •The Architecture of a Multiview Application
- •The Root Controller
- •Anatomy of a Content View
- •Building View Switcher
- •Creating Our View Controller and Nib Files
- •Modifying the App Delegate
- •Modifying BIDSwitchViewController.h
- •Adding a View Controller
- •Building a View with a Toolbar
- •Writing the Root View Controller
- •Implementing the Content Views
- •Animating the Transition
- •Switching Off
- •The Pickers Application
- •Delegates and Data Sources
- •Setting Up the Tab Bar Framework
- •Creating the Files
- •Adding the Root View Controller
- •Creating TabBarController.xib
- •The Initial Test Run
- •Implementing the Date Picker
- •Implementing the Single-Component Picker
- •Declaring Outlets and Actions
- •Building the View
- •Implementing the Controller As a Data Source and Delegate
- •Implementing a Multicomponent Picker
- •Declaring Outlets and Actions
- •Building the View
- •Implementing the Controller
- •Implementing Dependent Components
- •Creating a Simple Game with a Custom Picker
- •Writing the Controller Header File
- •Building the View
- •Adding Image Resources
- •Implementing the Controller
- •The spin Method
- •The viewDidLoad Method
- •Final Details
- •Linking in the Audio Toolbox Framework
- •Final Spin
- •Table View Basics
- •Table Views and Table View Cells
- •Grouped and Plain Tables
- •Implementing a Simple Table
- •Designing the View
- •Writing the Controller
- •Adding an Image
- •Using Table View Cell Styles
- •Setting the Indent Level
- •Handling Row Selection
- •Changing the Font Size and Row Height
- •Customizing Table View Cells
- •Adding Subviews to the Table View Cell
- •Creating a UITableViewCell Subclass
- •Adding New Cells
- •Implementing the Controller’s Code
- •Loading a UITableViewCell from a Nib
- •Designing the Table View Cell in Interface Builder
- •Using the New Table View Cell
- •Grouped and Indexed Sections
- •Building the View
- •Importing the Data
- •Implementing the Controller
- •Adding an Index
- •Implementing a Search Bar
- •Rethinking the Design
- •A Deep Mutable Copy
- •Updating the Controller Header File
- •Modifying the View
- •Modifying the Controller Implementation
- •Copying Data from allNames
- •Implementing the Search
- •Changes to viewDidLoad
- •Changes to Data Source Methods
- •Adding a Table View Delegate Method
- •Adding Search Bar Delegate Methods
- •Adding a Magnifying Glass to the Index
- •Adding the Special Value to the Keys Array
- •Suppressing the Section Header
- •Telling the Table View What to Do
- •Putting It All on the Table
- •Navigation Controller Basics
- •Stacky Goodness
- •A Stack of Controllers
- •Nav, a Hierarchical Application in Six Parts
- •Meet the Subcontrollers
- •The Disclosure Button View
- •The Checklist View
- •The Rows Control View
- •The Movable Rows View
- •The Deletable Rows View
- •The Editable Detail View
- •The Nav Application’s Skeleton
- •Creating the Top-Level View Controller
- •Setting Up the Navigation Controller
- •Adding the Images to the Project
- •First Subcontroller: The Disclosure Button View
- •Creating the Detail View
- •Modifying the Disclosure Button Controller
- •Adding a Disclosure Button Controller Instance
- •Second Subcontroller: The Checklist
- •Creating the Checklist View
- •Adding a Checklist Controller Instance
- •Third Subcontroller: Controls on Table Rows
- •Creating the Row Controls View
- •Adding a Rows Control Controller Instance
- •Fourth Subcontroller: Movable Rows
- •Creating the Movable Row View
- •Adding a Move Me Controller Instance
- •Fifth Subcontroller: Deletable Rows
- •Creating the Deletable Rows View
- •Adding a Delete Me Controller Instance
- •Sixth Subcontroller: An Editable Detail Pane
- •Creating the Data Model Object
- •Creating the Detail View List Controller
- •Creating the Detail View Controller
- •Adding an Editable Detail View Controller Instance
- •But There’s One More Thing. . .
- •Breaking the Tape
- •Creating a Simple Storyboard
- •Dynamic Prototype Cells
- •Dynamic Table Content, Storyboard-Style
- •Editing Prototype Cells
- •Good Old Table View Data Source
- •Will It Load?
- •Static Cells
- •Going Static
- •So Long, Good Old Table View Data Source
- •You Say Segue, I Say Segue
- •Creating Segue Navigator
- •Filling the Blank Slate
- •First Transition
- •A Slightly More Useful Task List
- •Viewing Task Details
- •Make More Segues, Please
- •Passing a Task from the List
- •Handling Task Details
- •Passing Back Details
- •Making the List Receive the Details
- •If Only We Could End with a Smooth Transition
- •Split Views and Popovers
- •Creating a SplitView Project
- •The Storyboard Defines the Structure
- •The Code Defines the Functionality
- •The App Delegate
- •The Master View Controller
- •The Detail View Controller
- •Here Come the Presidents
- •Creating Your Own Popover
- •iPad Wrap-Up
- •Getting to Know Your Settings Bundle
- •The AppSettings Application
- •Creating the Project
- •Working with the Settings Bundle
- •Adding a Settings Bundle to Our Project
- •Setting Up the Property List
- •Adding a Text Field Setting
- •Adding an Application Icon
- •Adding a Secure Text Field Setting
- •Adding a Multivalue Field
- •Adding a Toggle Switch Setting
- •Adding the Slider Setting
- •Adding Icons to the Settings Bundle
- •Adding a Child Settings View
- •Reading Settings in Our Application
- •Retrieving User Settings
- •Creating the Main View
- •Updating the Main View Controller
- •Registering Default Values
- •Changing Defaults from Our Application
- •Keeping It Real
- •Beam Me Up, Scotty
- •Your Application’s Sandbox
- •Getting the Documents Directory
- •Getting the tmp Directory
- •File-Saving Strategies
- •Single-File Persistence
- •Multiple-File Persistence
- •Using Property Lists
- •Property List Serialization
- •The First Version of the Persistence Application
- •Creating the Persistence Project
- •Designing the Persistence Application View
- •Editing the Persistence Classes
- •Archiving Model Objects
- •Conforming to NSCoding
- •Implementing NSCopying
- •Archiving and Unarchiving Data Objects
- •The Archiving Application
- •Implementing the BIDFourLines Class
- •Implementing the BIDViewController Class
- •Using iOS’s Embedded SQLite3
- •Creating or Opening the Database
- •Using Bind Variables
- •The SQLite3 Application
- •Linking to the SQLite3 Library
- •Modifying the Persistence View Controller
- •Using Core Data
- •Entities and Managed Objects
- •Key-Value Coding
- •Putting It All in Context
- •Creating New Managed Objects
- •Retrieving Managed Objects
- •The Core Data Application
- •Designing the Data Model
- •Creating the Persistence View and Controller
- •Persistence Rewarded
- •Managing Document Storage with UIDocument
- •Building TinyPix
- •Creating BIDTinyPixDocument
- •Code Master
- •Initial Storyboarding
- •Creating BIDTinyPixView
- •Storyboard Detailing
- •Adding iCloud Support
- •Creating a Provisioning Profile
- •Enabling iCloud Entitlements
- •How to Query
- •Save Where?
- •Storing Preferences on iCloud
- •What We Didn’t Cover
- •Grand Central Dispatch
- •Introducing SlowWorker
- •Threading Basics
- •Units of Work
- •GCD: Low-Level Queueing
- •Becoming a Blockhead
- •Improving SlowWorker
- •Don’t Forget That Main Thread
- •Giving Some Feedback
- •Concurrent Blocks
- •Background Processing
- •Application Life Cycle
- •State-Change Notifications
- •Creating State Lab
- •Exploring Execution States
- •Making Use of Execution State Changes
- •Handling the Inactive State
- •Handling the Background State
- •Removing Resources When Entering the Background
- •Saving State When Entering the Background
- •A Brief Journey to Yesteryear
- •Back to the Background
- •Requesting More Backgrounding Time
- •Grand Central Dispatch, Over and Out
- •Two Views of a Graphical World
- •The Quartz 2D Approach to Drawing
- •Quartz 2D’s Graphics Contexts
- •The Coordinate System
- •Specifying Colors
- •A Bit of Color Theory for Your iOS Device’s Display
- •Other Color Models
- •Color Convenience Methods
- •Drawing Images in Context
- •Drawing Shapes: Polygons, Lines, and Curves
- •The QuartzFun Application
- •Setting Up the QuartzFun Application
- •Creating a Random Color
- •Defining Application Constants
- •Implementing the QuartzFunView Skeleton
- •Creating and Connecting Outlets and Actions
- •Implementing the Action Methods
- •Adding Quartz 2D Drawing Code
- •Drawing the Line
- •Drawing the Rectangle and Ellipse
- •Drawing the Image
- •Optimizing the QuartzFun Application
- •The GLFun Application
- •Setting Up the GLFun Application
- •Creating BIDGLFunView
- •Updating BIDViewController
- •Updating the Nib
- •Finishing GLFun
- •Drawing to a Close
- •Multitouch Terminology
- •The Responder Chain
- •Responding to Events
- •Forwarding an Event: Keeping the Responder Chain Alive
- •The Multitouch Architecture
- •The Four Touch Notification Methods
- •The TouchExplorer Application
- •The Swipes Application
- •Automatic Gesture Recognition
- •Implementing Multiple Swipes
- •Detecting Multiple Taps
- •Detecting Pinches
- •Defining Custom Gestures
- •The CheckPlease Application
- •The CheckPlease Touch Methods
- •Garçon? Check, Please!
- •The Location Manager
- •Setting the Desired Accuracy
- •Setting the Distance Filter
- •Starting the Location Manager
- •Using the Location Manager Wisely
- •The Location Manager Delegate
- •Getting Location Updates
- •Getting Latitude and Longitude Using CLLocation
- •Error Notifications
- •Trying Out Core Location
- •Updating Location Manager
- •Determining Distance Traveled
- •Wherever You Go, There You Are
- •Accelerometer Physics
- •Don’t Forget Rotation
- •Core Motion and the Motion Manager
- •Event-Based Motion
- •Proactive Motion Access
- •Accelerometer Results
- •Detecting Shakes
- •Baked-In Shaking
- •Shake and Break
- •Accelerometer As Directional Controller
- •Rolling Marbles
- •Writing the Ball View
- •Calculating Ball Movement
- •Rolling On
- •Using the Image Picker and UIImagePickerController
- •Implementing the Image Picker Controller Delegate
- •Road Testing the Camera and Library
- •Designing the Interface
- •Implementing the Camera View Controller
- •It’s a Snap!
- •Localization Architecture
- •Strings Files
- •What’s in a Strings File?
- •The Localized String Macro
- •Real-World iOS: Localizing Your Application
- •Setting Up LocalizeMe
- •Trying Out LocalizeMe
- •Localizing the Nib
- •Localizing an Image
- •Generating and Localizing a Strings File
- •Localizing the App Display Name
- •Auf Wiedersehen
- •Apple’s Documentation
- •Mailing Lists
- •Discussion Forums
- •Web Sites
- •Blogs
- •Conferences
- •Follow the Authors
- •Farewell
- •Index
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new name, don’t worry. Just delete the app from the simulator, go back to Xcode, and build and run the app again.
Now, our application is fully localized for the French language.
Auf Wiedersehen
If you want to maximize sales of your iOS application, localize it as much as possible. Fortunately, the iOS localization architecture makes easy work of supporting multiple languages, and even multiple dialects of the same language, within your application. As you saw in this chapter, nearly any type of file that you add to your application can be localized.
Even if you don’t plan on localizing your application, get in the habit of using NSLocalizedString instead of just using static strings in your code. With Xcode’s Code Sense feature, the difference in typing time is negligible, and should you ever want to translate your application, your life will be much, much easier.
At this point, our journey is nearly done. We’re almost to the end of our travels together. After the next chapter, we’ll be saying sayonara, au revoir, auf wiedersehen, avtío, arrivederci, hej då, and adiós. You now have a solid foundation you can use to build your own cool iOS applications. Stick around for the going-away party though, as we still have a few helpful bits of information for you.
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Chapter 22
Where to Next?
Well, wow! You’re still with us, huh? Great! It sure has been a long journey since that very first iOS application we built together. You’ve certainly come a long way. We would love to tell you that you now know it all. But when it comes to technology, and especially when it comes to programming, you never know it all.
At its core, programming is about problem solving and figuring things out. It’s fun, and it’s rewarding. But, at times, you will run up against a puzzle that just seems insurmountable—a problem that appears to have no solution. Sometimes, the answer will come to you if you just take a bit of time away from the problem. A good night’s sleep or a few hours of doing something different can often be all that is needed to get you through it. Believe us—you can stare at the same problem for hours, overanalyzing and getting yourself so worked up that you miss an obvious solution. But sometimes, even a change of scenery doesn’t help. In those situations, it’s good to have friends in high places. This chapter outlines some resources you can turn to when you’re in a bind.
Apple’s Documentation
Become one with Xcode’s documentation browser, grasshopper. The documentation browser is a front end to a wealth of incredibly valuable sample source code, concept guides, API references, video tutorials, and a whole lot more.
There are few areas of iOS that you won’t be able to learn more about by making your way through Apple’s documentation. And if you get comfortable with Apple’s documentation, navigating through uncharted territories and new technologies as Apple rolls them out will be easier.
NOTE: Xcode’s documentation browser takes you to the same information you can get to by going to Apple’s Developer web site at http://developer.apple.com.
D.Mark et al., Beginning iOS 5 Development
©Dave Mark, Jack Nutting, Jeff LaMarche 2011
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CHAPTER 22: Where to Next? |
Mailing Lists
You might want to sign up for these handy mailing lists:
Cocoa-dev: This moderately high-volume list, run by Apple, is primarily about Cocoa for Mac OS X. Because of the common heritage shared by Cocoa and Cocoa Touch, however, many of the people on this list may be able to help you. (Do make sure to search the list archives before asking your question.)
http://lists.apple.com/mailman/listinfo/cocoa-dev
Xcode-users: Another list maintained by Apple, this one is specific to questions and problems related to Xcode.
http://lists.apple.com/mailman/listinfo/xcode-users
Quartz-dev: This is an Apple-maintained mailing list for discussion of the Quartz 2D and Core Graphics technologies.
http://lists.apple.com/mailman/listinfo/quartz-dev
Cocoa-unbound: This list, intended for discussion of both Mac and iOS development, appeared in 2010 in response to the sometimes heavyhanded moderation of some of the Apple-run lists, particularly Cocoadev. The posting volume is lower here, and topics can run a bit further afield.
http://groups.google.com/group/cocoa-unbound
IPhone SDK Development: Another third-party list, this one is focused entirely on iOS development. You’ll find a medium-sized community here, with a nice cast of regulars.
http://groups.google.com/group/iphonesdkdevelopment
Discussion Forums
These discussion forums allow you to post your questions to a wide range of forum readers:
iphonedevbook.com: As the official forum for this book, this features an active, vibrant community, full of people with the wisdom and sensibility to buy our book, such as yourself.
http://iphonedevbook.com
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CHAPTER 22: Where to Next? |
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Apple Developer Forums: This is a web forum set up by Apple specifically for discussing iOS and Mac software development. Many iOS programmers, both new and experienced (including Apple engineers and evangelists), contribute to these forums. It’s also the only place you can legally discuss issues with prerelease versions of the SDK that are under nondisclosure agreements. You’ll need to sign in with your Apple ID to access this forum.
http://devforums.apple.com
Apple Discussions, Developer Forums: This link connects you to
Apple’s community forums for Mac and iOS software developers:
http://discussions.apple.com/category.jspa?categoryID=164
Apple Discussions, iPhone: This link connects to Apple’s community forums for discussing the iPhone:
http://discussions.apple.com/category.jspa?categoryID=201
Web Sites
Visit these web sites for helpful coding advice:
CocoaHeads: This is the site of a group dedicated to peer support and promotion of Cocoa. It focuses on local groups with regular meetings where Cocoa developers can get together, help each other out, and even socialize a bit. There’s nothing better than knowing a real person who can assist you, so if there’s a CocoaHeads group in your area, check it out. If there’s not, why not start one?
http://cocoaheads.org
NSCoder Night: NSCoder Nights are weekly, organized meetings where Cocoa programmers get together to code and socialize. Like CocoaHeads meetings, NSCoder Nights are independently organized local events.
http://nscodernight.com
Stack Overflow: This is a community Q&A site targeted at programmers. Many experienced iOS programmers hang out here and answer questions.
http://stackoverflow.com
iDeveloper TV: This is a great resource for in-depth video training in iOS and Mac development, for a price. It also contains some nice, free video content, mostly from NSConference (listed in the “Conferences” section of this chapter), which is run by the same people behind iDeveloper TV.
http://ideveloper.tv
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