iOS 6编程指南：掌握最新API与兼容策略

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《iOS 6 Programming Cookbook》是一本专为iOS 6开发人员编写的实用指南，作者Vandad Nahavandipoor。该书详细探讨了iOS 6 SDK中可用的各种框架和类，旨在教授读者最新的API技术。随着苹果设备用户群体的多样性和更新速度，作者提醒开发者在选择API时要考虑兼容性，尤其是考虑到那些可能仍然使用旧版iOS系统的用户，应明智地确定你的应用目标最低iOS版本。书中内容覆盖广泛，深入剖析了iOS 6平台的核心组件和技术，包括但不限于： 1. **新特性介绍**：介绍了iOS 6引入的新功能和改进，如新的User Interface Kit (UIKit)升级、MapKit的增强、以及Social Framework的整合，这些都是开发者在构建应用程序时需要掌握的关键知识点。 2. **框架和类解析**：本书着重讲解了Core Data、Multipeer Connectivity、Game Center、Passbook和HealthKit等关键框架的使用方法，帮助开发者更好地理解和利用这些工具来提升用户体验。 3. **兼容性策略**：强调了如何编写代码以确保应用程序能在不同版本的iOS设备上运行顺畅，包括处理版本差异和向后兼容的技术实践。 4. **最佳实践**：提供了实用的编程技巧和优化建议，帮助开发者提高代码效率，降低维护成本，同时遵循Apple的指导原则。 5. **示例代码与项目实践**：书中包含大量的代码示例和实战项目，通过实际操作让读者更快掌握新技术，并理解其在实际开发中的应用场景。 6. **错误处理与调试**：书中还涉及如何有效地识别、处理和解决在iOS 6环境中可能出现的常见问题，帮助读者提升问题解决能力。 7. **学习资源与社区支持**：为了方便后续学习和交流，作者推荐了相关的在线资源，如O'Reilly的在线图书馆和开发者论坛，鼓励读者持续跟进最新的技术和趋势。《iOS 6 Programming Cookbook》适合iOS开发初学者以及希望扩展iOS 6技能的开发者阅读，它不仅是一本技术手册，也是一个学习和实践的工具箱，能助力开发者在快速变化的移动开发环境中保持竞争力。无论你是想要构建全新的应用还是优化现有产品，这本书都将提供宝贵的指导。

that provide an Objective-C interface. After reading this chapter and trying the

examples for yourself, you will feel much more confident using the Address Book

framework.

Chapter 12, Files and Folder Management

One of the most important tasks that, as developers, we want to perform in our

iOS apps is manipulating files and folders. Whether this means creating, reading

from, writing to, or deleting them, this chapter contains enough material to get

you up and running with file and folder management in iOS SDK.

Chapter 13, Camera and the Photo Library

Demonstrates how you can determine the availability of front- and back-facing

cameras on an iOS device. Some of the recipes in this chapter are specific to iOS 4

and above. You will also learn how to access the Photo Library using the Assets

Library framework, which is available in iOS 4 and later. At the end of the chapter,

you will learn about editing videos right on an iOS device using a built-in view

controller.

Chapter 14, Multitasking

Explains, with examples, how to create multitasking-aware applications that run

beautifully on iOS 4 and above. You will learn about background processing, in-

cluding how to play audio and retrieve users’ locations in the background, as well

as how to download content from a URL while your application is running in the

background.

Chapter 15, Core Data

Describes how to maintain persistent storage for your iOS applications using Core

Data. You will learn how to add to, delete from, and edit Core Data objects and

how to boost access to data in a table view. In addition, you will learn how to

manage relationships between Core Data objects.

Chapter 16, Dates, Calendars, and Events

Demonstrates the use of the Event Kit and Event Kit UI frameworks, which are

available on iOS 4 and later, in order to manage calendars and events on an iOS

device. You will see how to create, modify, save, and delete events. You will also

learn, through examples, how to add alarms to calendar events and how to set up

CalDAV calendars so that you can share a single calendar among multiple devices.

Chapter 17, Graphics and Animations

Introduces the Core Graphics framework. You will learn how to draw images and

text on a graphics context, grab the contents of a graphics context and save it as

an image, and much more.

Chapter 18, Core Motion

Explains the Core Motion framework. Using Core Motion, you will access

the accelerometer and the gyroscope on an iOS device. You will also learn how to

detect shakes on a device. Of course, not all iOS devices are equipped with an

xiv | Preface

accelerometer and a gyroscope, so you will also learn how to detect the availability

of the required hardware.

Chapter 19, iCloud

Shows how to use the iCloud service, which ties devices together and allows them

to share data to provide a seamless user experience as the user moves from one

device to another.

Chapter 20, Pass Kit

Perhaps one of the most important updates in iOS 6 is the introduction of Pass-

book: a virtual wallet, if you will, capable of managing your coupons, boarding

passes, rail and bus tickets, and much more. In this chapter, you will learn all there

is to know in order to be able to create your own digitally signed passes and dis-

tribute them to your users easily.

Additional Resources

From time to time, I refer to official Apple documentation. Some of Apple’s descriptions

are right on the mark, and there is no point in trying to restate them. Throughout this

book, I have listed the most important documents and guides in the official Apple

documentation that every professional iOS developer should read.

For starters, I suggest that you have a look at the iOS Human Interface Guidelines for

all iOS devices. This document will tell you everything you need to know about devel-

oping engaging and intuitive user interfaces for all iOS devices. Every iOS programmer

should read this document. In fact, I believe this should be required reading for the

product design and development teams of any company that develops iOS applications.

I also suggest that you skim through the “iOS Application Programming Guide” in the

iOS Reference Library for some tips and advice on how to make great iOS applications:

One of the things you will notice when reading Chapter 14 is the use of block objects.

This book concisely explains block objects, but if you require further details on the

subject, I suggest you read “A Short Practical Guide to Blocks,” available at this URL:

http://bit.ly/TsSMNU.

Throughout this book, you will see references to “bundles” and loading images and

data from bundles. You will read a concise overview about bundles in this book, but if

you require further information, head over to the “Bundle Programming Guide,” avail-

able at this URL: http://bit.ly/XdLKE6.

Conventions Used in This Book

The following typographical conventions are used in this book:

Italic

Indicates new terms, URLs, filenames, file extensions, and directories

Preface | xv

Constant width

Indicates variables and other code elements, the contents of files, and the output

from commands

Constant width bold

Highlights text in examples that is new or particularly significant in a recipe

Constant width italic

Shows text that should be replaced with user-supplied values

This icon signifies a tip, suggestion, or general note.

Using Code Examples

This book is here to help you get your job done. In general, you may use the code in

this book in your programs and documentation. You do not need to contact us for

permission unless you’re reproducing a significant portion of the code. For example,

writing a program that uses several chunks of code from this book does not require

permission. Selling or distributing a CD-ROM of examples from O’Reilly books does

require permission. Answering a question by citing this book and quoting example

code does not require permission. Incorporating a significant amount of example code

from this book into your product’s documentation does require permission.

We appreciate, but do not require, attribution. An attribution usually includes the

title, author, publisher, and ISBN. For example: “iOS 6 Programming Cookbook by

978-1-4493-4275-3.”

If you feel your use of code examples falls outside fair use or the permission given here,

feel free to contact us at permissions@oreilly.com.

We’d Like to Hear from You

Every example and code snippet in this book has been tested on the iPhone 3GS, iPhone

4, iPhone 4S, iPhone 5, iPad, and an iPhone/iPad Simulator, but occasionally you may

encounter problems—for example, if you have a different version of the SDK than the

version on which the example code was compiled and tested. The information in this

book has also been verified at each step of the production process. However, mistakes

and oversights can occur, and we will gratefully receive details of any you find, as well

as any suggestions you would like to make for future editions. You can contact the

author and editors at:

O’Reilly Media, Inc.

xvi | Preface

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We have a web page for this book, where we list errata, examples, and any additional

information. You can access this page at:

http://oreil.ly/iOS6_Programming_CB

To access the source codes for this book, please see the author’s website at:

https://github.com/vandadnp/ios-6-programming-cookbook-source-codes

To comment or ask technical questions about this book, send email to the following

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Acknowledgments

I would like to acknowledge Andy Oram, my much-respected editor, and everyone at

O’Reilly Media for their continuous support and inspiration, especially Rachel Rou-

Preface | xvii

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