《iPhone开发秘籍》：使用iPhone SDK构建应用

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"《The iPhone Developer's Cookbook: Building Applications with the iPhone SDK》是Erica Sadun撰写的一本关于iPhone应用开发的专业书籍，中文名为《iPhone开发秘籍》。该书以PDF格式提供，英文版，内容清晰，并包含了作者制作的书签以方便阅读和查找。" 这本书针对的是那些正在或计划编写iPhone软件的开发者，它旨在节省开发者们大量的开发时间。作者Erica Sadun在书中提供了数十个清晰明了的示例，涵盖了基本的iPhone开发技术，以及许多超越Apple官方文档的特殊效果实现。这使得读者不仅能掌握基础，还能了解到更高级的技术和技巧。 Tim Burks，一位iPhone软件开发者，评论这本书说，即使价格更高，这本书也物超所值。他指出，书中的实例能帮助开发者省去数周的开发时间，特别是那些展示特殊效果的例子，远超出了苹果官方的文档内容。 Ars Technica的副编辑Jacqui Cheng则认为，无论对初学者还是经验丰富的开发者来说，《iPhone Developer’s Cookbook》都是一个全面的iPhone开发指南。代码示例和截图进一步强化了书中众多的技巧和提示，使得学习过程更加直观。 BlackPixel Luminance的首席开发者和CEO Daniel Pasco将此书与经典编程书籍相提并论，他认为Erica Sadun对主题的掌握令人印象深刻，她以轻松而适当的技术细节呈现材料的方式，就像是iPhone开发者的《Petzold book》（指的是Charles Petzold的《代码：隐匿在计算机软硬件背后的语言》）。这本书的内容涵盖了iPhone SDK的各个方面，包括UI设计、多线程、网络编程、本地数据存储、动画效果、地图集成、推送通知等。通过深入浅出的讲解和实用的代码示例，读者可以学习如何利用Objective-C和Swift语言创建高质量的iOS应用程序。无论是对iPhone SDK的新手，还是寻求提升技术深度的开发者，这本书都是一份宝贵的资源。

Contents

Recipe: Accessing Address Book Image Data 271

Recipe: Displaying Address Book Information 273

Recipe: Browsing the Address Book 274

Browsing for (Only) E-Mail Addresses 277

Adding New Contacts 277

Core Location 278

How Core Location Works 278

Recipe: Core Location in a Nutshell 280

Recipe: Reverse Geocoding to an Address 283

Recipe: Accessing Maps Using Core Location Data 286

Recipe: Accessing Core Device Information 288

Recipe: Enabling and Disabling the Proximity

Sensor 289

Recipe: Using Acceleration to Locate “Up” 290

Recipe: Using Acceleration to Move Onscreen

Objects 292

Summary 295

10 Connecting to Services 297

Recipe: Adding Custom Settings Bundles 297

Declaring Application Settings 297

Recipe: Subscribing Applications to Custom URL

Schemes 302

Recipe: Checking Your Network Status 304

Testing the Network Status 304

Recovering a Local IP Address 305

Querying Site IP Addresses 306

Checking Site Availability 307

Recipe: Interacting with iPhone Databases 308

Recipe: Converting XML into Trees 311

Recipe: Storing and Retrieving Keychain Items 313

Storing Multiple Keychain Values 318

Keychain Persistence 319

Sending and Receiving Files 320

Recipe: Building a Simple Web-Based Server 321

Push Notifications 325

Summary 326

Preface

Few platforms match the iPhone’s unique developer technologies. It combines

OS X-based mobile computing with an innovative multitouch screen, location aware-

ness, an onboard accelerometer, and more.When Apple introduced the iPhone Cocoa

Touch SDK beta in early March 2008, developers responded in numbers that brought

Apple’s servers to its knees. Apple delivered more than one hundred thousand SDK

downloads in less than one week.The iPhone Developer’s Cookbook was written to address

this demand, providing an accessible resource for those new to iPhone programming.

Who This Book Is For

This book is written for new iPhone developers with projects to get done and a new

unfamiliar SDK in their hands.Although each programmer brings different goals and

experiences to the table, most developers end up solving similar tasks in their develop-

ment work:“How do I build a table?”;“How do I create a secure keychain entry?”;

“How do I search the Address Book?”;“How do I move between views?”; and “How do

I use Core Location?”

The iPhone Developer’s Cookbook is aimed squarely at anyone just getting started with

iPhone programming.With its clear, fully documented examples, it will get you up to

speed and working productively. It presents already tested ready-to-use solutions, letting

programmers focus on the specifics of their application rather than on boilerplate tasks.

How This Book Is Structured

This book offers single-task recipes for the most common issues new iPhone developers

face: laying out interface elements, responding to users, accessing local data sources, and

connecting to the Internet.The cookbook approach delivers cut-and-paste convenience.

Programmers can add source recipes into their projects and then customize them to their

needs. Each chapter groups related tasks together. Readers can jump directly to the kind

of solution they’re looking for without having to decide which class or framework best

matches that problem.

Here’s a rundown of what you’ll find in this book’s chapters:

Chapter 1: Getting Started with the iPhone SDK

Chapter 1 introduces the iPhone SDK and explores the iPhone as a delivery plat-

form, limitations and all. It explains the breakdown of the standard iPhone applica-

tion and enables you to build your first Hello World style samples.

xviii

Preface

Chapter 2: Views

Chapter 2 introduces iPhone views, objects that live on your screen.You see how

to lay out, create, and order your views to create backbones for your iPhone appli-

cations.You read about view hierarchies, geometries, and animations as well as how

users can interact with views through touch.

Chapter 3: View Controllers

The iPhone paradigm in a nutshell is this: small screen, big virtual worlds. In

Chapter 3, you discover the various UIViewController classes that enable you to

enlarge and order the virtual spaces your users interact with.You learn how to let

these powerful objects perform all the heavy lifting when navigating between

iPhone application screens.

Chapter 4: Alerting Users

The iPhone offers many ways to provide users with a heads up, from pop-up

dialogs and progress bars to audio pings and status bar updates. Chapter 4 shows

how to build these indications into your applications and expand your user-alert

vocabulary.

Chapter 5: Basic Tables

Tables provide an interaction class that works particularly well on a small, cramped

device. Many, if not most, apps that ship with the iPhone and iPod touch center

on tables, including Settings,YouTube, Stocks, and Weather. Chapter 5 shows how

iPhone tables work, what kinds of tables are available to you as a developer, and

how you can use table features in your own programs.

Chapter 6: Advanced Tables

iPhone tables do not begin and end with simple scrolling lists.You can build tables

with titled sections, with multiple scrolling columns, and more.You can add con-

trols such as switches, create translucent cell backgrounds, and include custom

fonts. Chapter 6 starts from where “Basic Tables” left off. It introduces advanced

table recipes for you to use in your iPhone programs.

Chapter 7: Media

As you’d expect, the iPhone can load and display media from a wide variety of

formats. It does music; it does movies. It handles images and Web pages.You can

present PDF documents and photo albums and more. Chapter 7 shows way after

way that you can import or download data into your program and display that data

using the iPhone’s multitouch interface.

Chapter 8: Control

The UIControl class provides the basis for many iPhones interactive elements,

including buttons, text fields, sliders, and switches. Chapter 8 introduces controls

and their use, both through well-documented SDK calls and through less-

documented ones.

xix

Preface

Chapter 9: People, Places, and Things

In addition to standard user interface controls and media components that you’d

see on any computer, the iPhone SDK provides a number of tightly focused devel-

oper solutions specific to iPhone and iPod touch delivery. Chapter 9 introduces

the most useful of these, including Address Book access (“people”), core location

(“places”), and sensors (“things”).

Chapter 10: Connecting to Services

As an Internet-connected device, the iPhone is particularly suited to subscribing to

Web-based services. Apple has lavished the platform with a solid grounding in all

kinds of network computing services and their supporting technologies.The

iPhone SDK handles sockets, password keychains, SQL access, XML processing,

and more. Chapter 10 surveys common techniques for network computing and

offering recipes that simplify day-to-day tasks.

Chapter 11: One More Thing: Programming Cover Flow

Although Cover Flow is not officially included in the iPhone SDK, it offers one of

the nicest and most beautiful features of the iPhone experience.With Cover Flow,

you can offer your users a gorgeously intense visual selection experience that puts

standard scrolling lists to shame. Chapter 11 introduces Cover Flow and shows

how you can use it in your applications.

Prerequisites

Here are basics you need on hand to begin programming for the iPhone or iPod touch:

A copy of Apple’s iPhone SDK. Download your copy of the iPhone SDK

from Apple’s iPhone Dev Center (http://developer.apple.com/iphone/).You must

join Apple’s (free) developer program before you download.

An iPhone or iPod touch. Although Apple supplies a simulator as part of its

SDK, you really do need to have an actual unit to test on if you’re going to develop

any serious software.You’ll be able to use the cable that shipped with your iPhone

or iPod touch to tether your unit to the computer and install the software you’ve

built.

An Apple iPhone Developer License. You will not be able to test your soft-

ware on an actual iPhone or iPod touch until you join Apple’s iPhone Developer

program (http://developer.apple.com/iphone/program). Members receive a

certificate that allows them to sign their applications and download them to the

platforms in question for testing and debugging.The program costs $99/year for

individuals and companies, $299/year for in-house enterprise development.

An Intel-based Macintosh running Leopard. The SDK requires a Macintosh

running Leopard OS X 10.5.3 or later. Apple requires an Intel-based computer in

32-bit mode. Many features do not work properly on PPC-based Macs or Intel

Macs in 64-bit mode. Reserve plenty of disk space and at least 1GB of RAM.

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