iOS 6开发全攻略：从基础到进阶

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"《精通iOS 6开发》是一本专为iOS开发者设计的详细指南，由Apress出版社出版，文档格式为PDF且具有高清质量。本书涵盖了iOS 6平台的关键技术，旨在帮助读者深入理解并掌握从基础交互到高级特性的开发流程。以下是各章节概览： 1. **欢迎来到丛林**：章节初识iOS开发环境，介绍开发者的角色和iOS 6系统架构，以及开发工具的配置。 2. **取悦图腾神**：可能涉及用户界面设计的最佳实践和用户体验原则，强调设计与功能的平衡。 3. **处理基本交互**：讲解如何构建用户界面元素的响应和事件处理，包括按钮、滑动等基本操作。 4. **更多用户界面乐趣**：深入探讨更复杂的控件、动画和自定义视图的创建和使用。 5. **自动旋转与尺寸适应**：讲述iOS设备的屏幕适配策略，确保应用在不同尺寸和方向下正常工作。 6. **多视图应用程序**：介绍多视图架构，如何管理多个界面视图的切换和协同工作。 7. **TabBar和Picker**：讲解这两种常见的导航组件，它们在应用中的角色和实现方式。 8. **表格视图入门**：从基础表格数据展示到复杂筛选和排序功能的讲解。 9. **导航控制器与表格视图**：结合导航结构，理解如何组织和管理应用程序的导航逻辑。 10. **Storyboard**：详细介绍故事板在iOS 6中的作用，如何用视觉化的方式来设计和构建用户界面。 11. **iPad考虑因素**：针对iPad特有的屏幕特性和用户体验优化，包括适配大屏和多指触控。 12. **应用设置与UserDefaults**：讲解如何存储和管理用户的首选项和设置，提升应用的个性化体验。 13. **基本数据持久化**：介绍本地数据存储技术，如Core Data和SQLite，确保数据在应用生命周期中的持久性。 14. **嘿！你！上云吧！**：探讨iCloud服务在数据同步和离线存储中的应用，提高应用的云端协作能力。 15. **Grand Central Dispatch与后台处理**：讲解并发编程和异步任务的管理，提高应用性能。 16. **Quartz和OpenGL绘图**：涉及图形渲染和动画制作，提升UI视觉效果。 17. **触摸、手势识别**：详细解释如何捕捉和解析各种触摸事件，实现精细的交互控制。 18. **...** (其余章节继续深入探讨音视频处理、网络请求、安全性等内容)。通过阅读这本书，读者可以全面掌握iOS 6开发的各个方面，无论是初学者还是经验丰富的开发者都能从中受益匪浅。"

12 CHAPTER 2: Appeasing the Tiki Gods

Figure 2-1. The Xcode welcome window

The project we’re going to build in this chapter is contained in the 02 Hello World folder of the

project archive.

Before we can start, we need to launch Xcode. Xcode is the tool that we’ll use to do most of what

we do in this book, and after downloading it from the Mac App Store you’ll find it installed in the

/Applications folder as with most Mac applications. You’ll be using Xcode a lot, so you might want to

consider dragging it to your dock so you’ll have ready access to it.

If this is your first time using Xcode, don’t worry; we’ll walk you through every step involved in

creating a new project. If you’re already an old hand but haven’t worked with Xcode 4, you will find

that quite a bit has changed (mostly for the better, we think).

When you first launch Xcode, you’ll be presented with a welcome window like the one shown in

Figure 2-1. From here, you can choose to create a new project, connect to a version-control system

to check out an existing project, or select from a list of recently opened projects. The welcome

window also contains links to iOS and Mac OS X technical documentation, tutorial videos, news,

sample code, and other useful items. All of this functionality can be accessed from the Xcode menu

as well, but this window gives you a nice starting point, covering some of the most common tasks

you’re likely to want to do after launching Xcode. If you feel like poking through the information here

for a few minutes, by all means go right ahead. When you’re finished, close the window, and we’ll

proceed. If you would rather not see this window in the future, just uncheck the Show this window

when Xcode launches checkbox before closing it.

15CHAPTER 2: Appeasing the Tiki Gods

We also need to specify the Device Family. In other words, Xcode wants to know if we’re building

an app for the iPhone and iPod touch, if we’re building an app for the iPad, or if we’re building a

universal application that will run on all iOS devices. Select iPhone for the Device Family if it’s not

already selected. This tells Xcode that we’ll be targeting this particular app at the iPhone and iPod

touch, which have the same screen size. For the first part of the book, we’ll be using the iPhone

device family, but don’t worry—we’ll cover the iPad also.

There are three checkboxes on this sheet. You should check the middle option, Use Automatic

Reference Counting, but uncheck the other two. Automatic Reference Counting (ARC) is a recent

addition to the Objective-C language, introduced with iOS 5, that makes your life much easier. We’ll

talk briefly about ARC in the next chapter.

The Use Storyboard option will be covered starting in Chapter 10. The other option—Include Unit

Tests—will set up your project in such a way that you can add special pieces of code to your

project, called unit tests, which are not part of your application but run every time you create your

application to test certain functionality. Unit tests allow you to identify when a change made to your

code breaks something that was previously working. Although it can be a valuable tool, we won’t be

using automated unit testing in this book, so you can leave its box unchecked.

Click Next again, and you’ll be asked where to save your new project using a standard save sheet,

as shown in Figure 2-4. If you haven’t already done so, jump over to the Finder and create a new

master directory for these book projects, and then return to Xcode and navigate into that directory.

Before you click the Create button, make note of the the Create local git repository for this project

checkbox. We won’t be talking about git in this book, but Xcode includes some support for using git

and other kinds of source control repositories. If you are already familiar with git and want to use it,

leave this checkbox enabled, but otherwise feel free to turn it off.

Figure 2-4. Saving your project in a project folder on your hard drive

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