《More iPhone 3 Development》：深入探索iPhone SDK 3实战指南

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"《More iPhone 3 Development: Tackling iPhone SDK 3》是一本由Dave Mark和Jeff LaMarche合著的专业书籍，两位作者是《Beginning iPhone Development》畅销书的作者。本书专注于iPhone SDK的深入开发，旨在提供关于iPhone 3及后续版本应用开发的详尽指南。在《More iPhone 3 Development》中，读者可以期待对iPhone SDK的全面覆盖，包括API的深入探讨和实用洞察。书中内容涵盖了从基础到高级的主题，帮助开发者更好地理解和利用iPhone平台的各种特性，如界面设计、多媒体处理、网络通信、多线程编程以及数据存储等。作者们以其丰富的经验和专业知识，带领读者解决在iOS开发过程中可能遇到的问题，并分享他们在实际项目中的最佳实践。该书强调版权保护，所有内容未经版权所有者和出版商的书面许可，不得以任何形式复制或传播。本书有两个版本，纸质版ISBN-13为978-1-4302-2505-8，电子版则为978-1-4302-2743-4，表明了其在印刷和数字领域的发行情况。作者们对于商标的尊重体现在书中，只在编辑性使用中提及商标名，既展示了对知识产权的尊重，又不侵犯商标所有者的权益。此外，这本书由Paul Manning担任总统兼出版商，Clay Andres负责主要编辑工作，而Douglas P则是发展编辑，确保了内容的质量和专业性。《More iPhone 3 Development: Tackling iPhone SDK 3》不仅适合初学者提升对iPhone SDK的理解，也是经验丰富的开发者在面临新版本SDK挑战时的宝贵参考资源。通过阅读本书，开发者可以提升技能，适应不断发展的iPhone应用程序开发环境，推动创新应用的诞生。"

xiv

Acknowledgments

This book could not have been written without our mighty, kind, and clever families, friends, and cohorts. First and

foremost, eternal thanks to Terry and Deneen for putting up with us, and for keeping the rest of the universe at bay

while we toiled away on this book. This project saw us tucked away in our writers’ cubby for many long hours, and

somehow, you didn’t complain once. We are lucky men.

This book could not have been written without the fine folks at Apress. Clay Andres brought us to Apress in the first

place and carried this book on his back. Dominic Shakeshaft was the gracious mastermind who dealt with all of our

complaints with a smile on his face, and somehow found solutions that made sense and made this book better.

Kelly Moritz, our wonderful and gracious coordinating editor, was the irresistible force to our slowly movable

object. Douglas Pundick, our developmental editor, helped us with some terrific feedback along the way. They kept

the book on the right track and always pointed in the right direction. Marilyn Smith and Ralph Moore, copy editors

extraordinaire, you were both such a pleasure to work with! Jeffrey Pepper, Frank McGuckin, Angie MacAllister,

and the Apress production team took all these pieces and somehow made them whole. Leo Cuellar and Jeff

Stonefield assembled the marketing message and got it out to the world. To all the folks at Apress, thank you, thank

you, thank you!

A very special shout out to our incredibly talented technical reviewer, Mark Dalrymple. In addition to

providing insightful feedback, Mark tested all the code in this book, and helped keep us on the straight and

narrow. Thanks, Mark!

Finally, thanks to our children for their patience while their dads were working so hard. This book is for you,

Maddie, Gwynnie, Ian, Kai, Daniel, Kelley, and Ryan.

Preface

The preface to our previous book, Beginning iPhone 3 Development, started with the phrase, “What an amazing

journey!” Well, it’s true. We’re having a blast, making a lot of new friends and, above all, learning, learning,

learning. The iPhone SDK continues to evolve, and with each new release, it brings new concepts to explore and

new design patterns to master.

As its name implies, More iPhone 3 Development assumes you’ve read Beginning iPhone 3 Development or one of

the other terrific titles out there, or have tackled the iPhone dev learning curve on your own. If you are a beginner,

not to worry, our approach is the same. We talk you through the concepts, and then build a new project and walk

you through the source code, with a sprinkling of tips and cautions along the way.

The book starts off with a series of chapters that cover Core Data, Apple’s official iPhone persistence framework. If

the concept of persistence is new to you, don’t be intimidated by the name. When you want your data to stick

around from one run of your app to the next, that’s persistence. Beginning iPhone 3 Development touched on the

topic with a brief introduction to Core Data, but More iPhone 3 Development starts from scratch and gives you a

complete tour through Core Data, with a lot of reusable code. By the time you are finished with the Core Data

chapters, you should have everything you need to add Core Data to your own iPhone apps.

Next up, we offer a series of chapters on GameKit and networking. The GameKit framework makes it easy to add

Bluetooth connectivity to your apps. We bring GameKit to life by building a simple, two-person game. We then

follow that up by taking iPhone networking to the next level, showing you how to expand your networking skill set

to include game play over a local area network. Once you’ve mastered those techniques, it’s just a short step to

adding Internet play. Our final networking chapter explores techniques for pulling data from the Internet and

interacting with web servers.

Those chapters cover the most widely requested topics by our readers. We hope you’ll find them worth the price of

admission. But wait, there’s more! We also cover MapKit, in-application e-mail, and adding iPod functionality to

your applications via the MediaPlayer framework. Finally, we wrap up things with chapters on concurrency and

debugging techniques.

Before we leave you to your reading, we just want to say how much we appreciate your support. You’ve truly made

this a gratifying experience for us both. As always, be sure to check out http://iphonedevbook.com/forum, and drop

us a line to let us know about your amazing new apps. We look forward to seeing you on the forum. Happy coding!

Dave and Jeff

Chapter

Here We Go Round Again

So, you’re still creating iPhone applications, huh? Great! The iPhone and the App Store

have been a tremendous success, fundamentally changing the way mobile applications

are delivered and completely changing what people expect from their mobile phones.

Since the first release of the iPhone Software Development Kit (SDK) way back in March

2008, Apple has been busily adding new functionality and improving what was already

there. It’s no less exciting of a platform than it was back when it was first introduced. In

fact, in many ways, it’s more exciting, because Apple keeps expanding the amount of

functionality available to third-party developers like us.

What This Book Is

This book is a guide to help you continue down the path to creating better iPhone

applications. In Beginning iPhone 3 Development (Apress, 2009), our goal was to get

you past the initial learning curve, and to help you get your arms around the

fundamentals of building your first iPhone applications. In this book, we’re assuming you

already know the basics. So, in addition to showing you how to use several of the new

APIs introduced with iPhone SDK 3.0, we’re also going to weave in some more

advanced techniques that you’ll need as your iPhone development efforts grow in size

and complexity.

In Beginning iPhone 3 Development, every chapter was self-contained, each presenting

its own unique project or set of projects. We’ll be using a similar approach in the second

half of this book, but in Chapters 2 through 7, we’ll focus on a single, evolving Core Data

application. Each chapter will cover a specific area of Core Data functionality as we

expand the application. We’ll also be strongly emphasizing techniques that will keep

your application from becoming unwieldy and hard to manage as it gets larger.

What You Need to Know

This book assumes that you already have some programming knowledge and that you

have a basic understanding of the iPhone SDK, either because you’ve worked through

Beginning iPhone 3 Development or because you’ve gained a similar foundation from

CHAPTER 1: Here We Go Round Again

other sources. We assume that you’ve experimented a little with the SDK, perhaps

written a small program or two on your own, and have a general feel for how Xcode and

Interface Builder work.

COMPLETELY NEW TO THE IPHONE?

If you are completely new to iPhone development, there are other books you probably should read before

this one. If you don’t already understand the basics of programming and syntax of the C language, you

should check out Learn C on the Mac by Dave Mark (Apress, 2008), which is a comprehensive introduction

to the C language for Macintosh programmers:

http://www.apress.com/book/view/1430218096

If you already understand C, but don’t have any experience programming with objects, check out Learn

Objective-C on the Mac (Apress, 2009), an excellent and approachable introduction to Objective-C by Mac

programming experts Mark Dalrymple and Scott Knaster:

http://www.apress.com/book/view/1430218150

Next, navigate over to the Apple iPhone Development Center and download a copy of The Objective-C 2.0

Programming Language, a very detailed and extensive description of the language and a great reference

guide:

http://developer.apple.com/iphone/library/documentation/Cocoa/Conceptual/

ObjectiveC/

Note that you’ll need to log in (we’ll get to registration in the next section) before you are taken to the start

of this document.

Once you have a firm handle on Objective-C, you need to master the fundamentals of the iPhone SDK. For

that, you should check out the prequel to this book, Beginning iPhone 3 Development (Apress 2008):

http://www.apress.com/book/view/1430216263

What You Need Before You Can Begin

Before you can write software for iPhone, you need a few things. For starters, you’ll

need an Intel-based Macintosh running Snow Leopard (Mac OS X 10.6.2 or later). Any

Macintosh computer—laptop or desktop—that has been released since 2006 should

work just fine, but make sure your machine is Intel-based and is capable of running

Snow Leopard.

NOTE: You actually can develop for the iPhone using Leopard (Mac OS X 10.5 or later), but there

are many great new features in Xcode that are available only on Snow Leopard. Therefore, we

highly recommend upgrading to Snow Leopard if you are using an earlier release.

This may seem obvious, but you’ll also need an iPhone or iPod touch. While much of

your code can be tested using the iPhone simulator, not all programs will run in the

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《More iPhone 3 Development》：深入探索iPhone SDK 3实战指南

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