iOS 6开发入门指南：从基础到进阶

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"《 Beginning iOS 6 Development》是一本针对iOS开发者的专业指南，涵盖了iOS 6开发的基础到进阶知识。本书以实践为导向，旨在帮助读者快速上手并深入理解苹果平台的应用开发。以下章节概览了主要内容： 1. **欢迎来到丛林** - 引导读者进入iOS开发的世界，介绍开发环境、工具以及项目设置的基本概念。 2. **取悦Tiki神** - 涉及应用程序的初始化和基本架构设置，确保应用能够顺利启动并呈现友好的用户体验。 3. **处理基础交互** - 详细讲解用户界面元素的响应、触摸事件和控件的基本操作。 4. **更多的用户界面乐趣** - 探讨更高级的UI设计和用户体验技巧，如动画和自定义视图。 5. **自动旋转与自适应** - 学习如何处理设备旋转和屏幕尺寸变化，实现多设备兼容性。 6. **多视图应用程序** - 教授如何构建和管理多个视图以及它们之间的切换逻辑。 7. **标签栏与选择器** - 介绍了iOS应用中的导航结构，包括标签栏和数据选择组件的使用。 8. **表格视图入门** - 介绍表格视图的基本用法，它是数据展示的重要组件。 9. **导航控制器和表格视图** - 深入解析导航控制器在复杂应用中的作用，结合表格视图创建流畅的导航体验。 10. **故事板** - 讲解如何利用故事板进行界面设计和事件驱动编程，提升界面布局的灵活性。 11. **iPad优化** - 特别关注针对iPad设备的设计和功能差异，确保跨平台应用的适配性。 12. **应用设置与UserDefaults** - 学习如何管理应用的配置选项和数据存储，提升用户的个性化体验。 13. **基础数据持久化** - 介绍如何在iOS环境中保存和恢复数据，确保数据安全和一致性。 14. **迈向iCloud** - 探索如何利用iCloud服务进行云同步，扩展应用的功能和用户体验。 15. **Grand Central Dispatch与后台处理** - 讨论并发编程和任务调度，提高应用性能。 16. **Quartz和OpenGL绘图** - 进一步学习图形和动画的高级技术，提升视觉效果。 17. **触控、手势和事件处理** - 分析各种触摸事件和手势识别，增强用户交互。 18. **以及更多** - 包含其他关键主题，确保读者全面掌握iOS 6开发的各个方面。通过阅读这本书，读者可以建立起坚实的iOS开发基础，掌握最新版本的SDK和技术趋势，从而为构建高效、美观的iOS应用打下坚实的基础。"

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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