《iPhone开发者烹饪手册》- 编程经典指南

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"《The iPhone Developer's Cookbook》是iOS开发领域的一本经典著作，作者Erica Sadun以其深厚的技术功底，为程序员们提供了丰富的iPhone应用开发指导。这本书旨在帮助开发者节省大量的开发时间，通过清晰、实用的代码示例，深入浅出地讲解了iOS编程的关键技术和超越官方文档的特效实现。" 《The iPhone Developer's Cookbook》一书包含了大量关于iPhone应用开发的实用技巧和案例，适合从初学者到经验丰富的开发者阅读。作者Tim Burks在评价本书时提到，这是一本超值的指南，能够帮助开发者节省数周的开发时间，其中包含的数十个实例涵盖了iPhone开发的核心技术，同时扩展至苹果官方文档未深入探讨的特效。 Jacqui Cheng，Ars Technica的副编辑，称赞这本书是全面的iPhone开发教程，不仅对新手友好，也对有经验的开发者有所帮助。书中结合代码示例和截图，强调了众多开发提示和技巧，使得内容更加生动易懂。 BlackPixel Luminance的首席开发者兼CEO Daniel Pasco将本书比作iPhone开发者的"Petzold书"，暗指它在该领域的权威地位，如同Charles Petzold的《代码：隐藏在计算机软硬件背后的语言》对于Windows程序员的重要性。他赞扬了Erica Sadun对主题的精通以及她将复杂技术以轻松、详尽的方式呈现的能力。这本书的内容可能包括但不限于以下部分： 1. iOS SDK基础：介绍如何安装和设置开发环境，理解Xcode IDE的基本用法。 2. Objective-C与Swift：讲解这两种编程语言的基础语法，以及如何在iOS应用中使用它们。 3. 用户界面设计：讨论UIKit框架，包括UIControls，Views，Storyboard和Auto Layout等，用于创建美观且响应式的用户界面。 4. 数据管理：涵盖Core Data，SQLite，JSON等数据存储和解析技术。 5. 网络编程：讲解网络请求，如HTTP/HTTPS，JSON解析，以及AFNetworking等库的使用。 6. 多媒体处理：包括音频、视频和图像的处理和显示技术。 7. 地图与定位：集成MapKit，实现地图功能和地理位置服务。 8. 通知与推送：介绍本地通知和远程推送通知的实现方法。 9. 多线程与性能优化：讲解Grand Central Dispatch (GCD) 和性能调优策略。 10. 测试与发布：介绍单元测试，集成测试，以及如何通过App Store提交应用。《The iPhone Developer's Cookbook》是iOS开发者不可或缺的参考书籍，无论你是刚开始接触iOS开发，还是寻求提升现有技能，都能从中获益匪浅。

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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