iOS 8开发入门：Objective-C打造iPhone与iPad应用

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"《 Beginning iPhone Development》是一本专门针对初学者的指南，教你如何利用iOS 8 SDK（Software Development Kit）和Objective-C语言开发iPhone和iPad应用。本书适合对iOS平台有兴趣但缺乏经验的开发者，通过一步步深入讲解，让读者掌握从基础交互到高级功能的开发技巧。在本书的第一章“欢迎来到丛林”中，作者会引导读者进入iOS开发的世界，介绍必要的环境设置和开发工具。接着，“迎合图腾神祇”（Chapter 2）将探讨如何创建吸引人的用户界面，包括设计原则和元素布局。 “处理基本交互”（Chapter 3）涵盖了触摸事件、控件响应和用户输入的基础知识，确保应用程序能够顺畅地与用户互动。随着章节推进，“更多的用户界面乐趣”（Chapter 4）会介绍更复杂的控件、动画和用户体验设计。 “旋转和适应性布局”（Chapter 5）着重于应用程序在不同设备和屏幕方向上的适配，这对于实现跨设备兼容至关重要。接下来的“多视图应用程序”（Chapter 6）讲解如何构建多任务管理和切换逻辑。 “TabBar和Picker”（Chapter 7）介绍了iOS中的这两个常见导航组件，帮助开发者组织内容和提供选择。然后，“表格视图入门”（Chapter 8）详细解释了数据展示的核心工具——表格视图，以及如何用它来呈现信息。 “导航控制器和表格视图的结合”（Chapter 9）进一步深化表格视图在导航结构中的运用，提升用户体验。而在“CollectionView”（Chapter 10）中，读者将学习如何使用另一种高效的数据展示方式。 “分视图和弹出式菜单”（Chapter 11）涉及窗口管理和屏幕空间的利用，以实现更丰富的用户体验。章节12讨论“应用设置和UserDefaults”，帮助开发者管理应用的配置选项和存储用户的首选项。最后，“基本数据持久化”（Chapter 13）介绍如何保存和加载数据，以及使用Documents和Core Data进行更复杂的数据管理。通过这些章节的学习，读者将具备足够的技能去构建功能完备的iOS应用。总体而言，《 Beginning iPhone Development》提供了一个循序渐进的教程，从基础到高级，旨在帮助开发者建立起扎实的iOS开发基础，并培养实际操作能力。无论是初次接触iOS的开发者还是希望提升技能的专业人士，都能从中获益匪浅。"

Chapter 2

Appeasing the Tiki Gods

As you’re probably well aware, it has become something of a tradition to call the first project in any

book on programming, “Hello, World.” We considered breaking with this tradition, but were scared

that the Tiki gods would inflict some painful retribution on us for such a gross breach of etiquette.

So, let’s do it by the book, shall we?

In this chapter, we’re going to use Xcode to create a small iOS application that will display the text,

“Hello, World!” We’ll look at what’s involved in creating an iOS application project in Xcode, work

through the specifics of using Xcode’s Interface Builder to design our application’s user interface,

and then run our application on the iOS simulator. After that, we’ll give our application an icon to

make it feel more like a real iOS application.

We have a lot to do here, so let’s get going.

Setting Up Your Project in Xcode

By now, you should have Xcode and the iOS SDK installed on your machine. You should also

download the book’s source code archive from the Apress web site (http://apress.com). While

you’re at it, take a look at the book forums at http://forum.learncocoa.org/. The book forums

are a great place to discuss iOS development, get your questions answered, and meet up with

like-minded people.

Note Even though you have the complete set of project files at your disposal in this book’s source code

archive, you’ll get more out of the book if you create each project by hand, rather than simply running

the version you downloaded. By doing that, you’ll gain familiarity and expertise working with the various

application development tools.

There’s no substitute for actually creating applications; software development is not a spectator sport.

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17CHAPTER 2: Appeasing the Tiki Gods

The Language field lets you select the programming language that you want to use. You can choose

between Objective-C and Swift. Since you’re reading the Objective-C version of this book, the

appropriate choice here is, of course, Objective-C.

We also need to specify the Devices. 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 Devices 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

roughly the same screen size and form factor. For the first few chapters of the book, we’ll be using

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

Leave the Core Data check box unchecked—we’ll make use of it in Chapter 13. Click Next again,

and you’ll be asked where to save your new project using a standard save sheet (see Figure 2-4). If

you haven’t already done so, jump over to the Finder, 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, take note of the Source Control check box. We won’t be talking about Git in this book, but

Xcode includes some support for using Git and other kinds of source control management (SCM)

tools. If you are already familiar with Git and want to use it, enable this check box; otherwise, feel

free to turn it off.

Note Source Control Management (SCM) is a technique for keeping track of changes made to an

application’s source code and resources while it’s being built. It also facilitates multiple developers working

on the same application at the same time by providing tools to resolve conflicts when they arise. Xcode has

built-in support for Git, one of the most popular SCM systems in use today. We won’t be dealing with source

control issues in this book, so it’s up to you to enable it or disable it, whichever works for you.

After choosing whether to create a Git repository, create the new project by clicking the Create

button.

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Tristansky

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iOS 8开发入门：Objective-C打造iPhone与iPad应用

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《Beginning iPhone Development》英文原版（iPhone开发基础教程）