Cocoa与Objective-C快速入门指南：实战程序员心得

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"《Cocoa与Objective-C：入门与实践》（CocoaandObjective-C:UpandRunning）是一本由Scott Stevenson所著的实战导向的编程指南，它针对C语言面向对象（Object-Oriented Programming，OOP）在Apple的Mac OS X和iOS开发中的应用进行了深入浅出的讲解。本书的优势在于作者以其身为程序员的经验和直白的语言，避免了非专业出身的程序员可能带来的理论叙述中的冗余和误导，提供了易于上手的学习体验。书名中的"Cocoa"是Apple的跨平台应用程序开发框架，它基于Objective-C语言，为开发者构建高质量图形用户界面（GUI）和应用程序提供了丰富的工具和API。Objective-C是C语言的一个扩展，它结合了C的效率和C++的面向对象特性，使得在Mac OS X和iOS平台上进行开发变得更加高效和灵活。本书的主要内容包括但不限于以下几个部分： 1. 基础介绍：从C语言基础知识和Objective-C语法入手，帮助读者建立起坚实的编程基础，同时逐步引入Cocoa框架的核心概念。 2. Cocoa架构：详细解释MVC（Model-View-Controller）设计模式在Cocoa中的运用，以及如何利用Cocoa的各种类库（如NSView、UIViewController等）创建交互式应用程序。 3. 视图和用户界面：讲解如何设计和实现美观且响应式的用户界面，包括NIB文件、Auto Layout和Storyboard的使用。 4. 内存管理和对象生命周期：阐述Objective-C的内存管理规则，包括ARC（Automatic Reference Counting）和手动引用计数的区别，确保程序的稳定性和性能。 5. 网络编程与数据存储：涉及HTTP请求、JSON解析和Core Data的使用，让读者了解如何与服务器通信并持久化数据。 6. 多线程和并发编程：探讨如何利用Grand Central Dispatch（GCD）和NSOperationQueue进行高效的并发处理，提高应用性能。 7. 单元测试与调试：提供实用的单元测试技巧和调试策略，帮助开发者编写健壮的代码。通过阅读这本书，读者不仅能够掌握Cocoa和Objective-C的基础，还能学习到现代软件开发的最佳实践。《Cocoa与Objective-C：入门与实践》适合初学者和有一定C/C++经验的开发人员，无论是想要进入iOS开发领域，还是寻求提升现有Mac OS X应用开发能力的开发者，都能从中受益匪浅。"

Chapter 11

Now that you’ve read through the book, you’re ready to write some apps. This

short chapter gives you a few last pointers to help you on your way.

Conventions Used in This Book

The following typographical conventions are used in this book:

Italic

Indicates new terms, URLs, email addresses, filenames, and file extensions.

Constant width

Used for program listings, as well as within paragraphs to refer to program elements

such as variable or function names, databases, data types, environment variables,

statements, and keywords.

Constant width bold

Shows commands or other text that should be typed literally by the user.

Constant width italic

Shows text that should be replaced with user-supplied values or by values deter-

mined by context.

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

This icon indicates a warning or caution.

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: “Cocoa and Objective-C: Up and Running

xiv | Preface

For more information about our books, conferences, Resource Centers, and the

O’Reilly Network, see our website at:

http://www.oreilly.com

Acknowledgments

My education didn’t follow the normal path. I taught myself how to program and

learned how to run a business mostly by trial and error. In the end, I think this is the

only option that would have worked for me, but it was possible only because of my

extremely patient and understanding family: my mom, Peggy; my dad, Alan; and my

sister, Jamie. You would not be reading this now if it was not for their support.

There are so many people that have helped me in my work life, but there are a few that

have had a direct impact on this book.

Michael Lopp and Angela Muller were ongoing sources of encouragement and inspi-

ration. This book first came into being over lunch when Michael mentioned something

along the lines of “everyone wants an animal on the cover of their book,” referring to

the iconic O’Reilly covers. By incredible coincidence, Brian from O’Reilly emailed me

about two weeks later. Had Michael not made that comment, this might not have

happened.

I had world-class tech reviewers for this project: Joar Wingfors, Michael Jurewitz, Rob

Rhyne, and Tim Triemstra. Joar, who I originally met through the tutorials I posted

online, tirelessly reviewed an ever-changing book, provided a wealth of essential com-

ments and suggestions, and even helped me fix some bugs in the code. He’s one of the

most talented engineers I know, and I am thrilled to have been able to get his help on

this.

Though he wasn’t involved in this project, I owe a lot to John Mora. He has an ability

to look an impossibly large task in the face and just do it, despite the usual doubts about

whether you know enough or have enough time. It is one of the most impressive traits

I know of, and John has it in spades. Thankfully, I think some of that rubbed off on

me over the 15 years I’ve known him.

Thanks to Kip Krueger for patiently helping me figure out the low-level details of mem-

ory and offering pointers when I was learning C. His mentoring is the reason I’m able

to teach these topics to you now.

When I first started learning Cocoa, there were only two books out on the topic. I chose

Aaron Hillegass’s book Cocoa Programming for Mac OS X (Addison-Wesley). Not only

was it the first Mac programming book I read, it was the first technical book I actually

enjoyed. His book proved to me that you could write in a direct and personal style and

still be taken seriously. Having spent time with him in person, I can also add that he’s

a great guy. There’s no doubt that his influence is weaved into the tutorials I’ve written.

xvi | Preface

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