First iOS App_Set Up
建立Set Up
当你开发应用，使用 iOS 软件开发工具箱 （SDK）和 Xcode.app ，还有苹果的完整的开发环境（IDE）。Xcode.app 提供给你创建好的 iPhone/iPod touch/iPad应用 的所有需要的东西。Xcode.app 包含一个原始资料编辑器，一个图形化的用户接口编辑器，多个其他的专题。Xcode.app 采用一个唯一窗口 —— 工作空间窗口，显示大部分你需要用到的开发应用的工具。在这个窗口，你可以流畅的切换于写代码、调试、设计用户接口。iOS SDK 扩展了 Xcode.app 工具集，包含了你需要的iOS特别的工具、编译器和框架。When you develop apps, you use the iOS software development kit (SDK) and Xcode, Apple’s integrated development environment (IDE). Xcode provides everything you need to create great apps for iPhone, iPod touch, and iPad. It includes a source editor, a graphical user interface editor, and many other features. Xcode employs a single window, called the workspace window, that presents most of the tools you need to develop apps. Within this window you smoothly transition from writing code, to debugging, to designing your user interface. The iOS SDK extends the Xcode toolset to include the tools, compilers, and frameworks you need specifically for iOS.
To get started(开始开发的准备):
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现在最新版本的 Xcode.app Download the latest version of Xcode.
在你的 Mac（苹果计算机的系统） 上打开 Mac App Store 应用，搜索 Xcode.app ，点击免费下载 Xcode.app。当你下载了 Xcode.app 后，iOS SDK 已经包含在里里面了。（Mac App Store 应用是安装在 Mac OS 10.7及以上版本的）。如果你是早期版本，需要升级才可以安装最新的 Xcode.app 。Open the Mac App Store app on your Mac, search for Xcode, and click Free to download Xcode. When you download Xcode, the iOS SDK is included. (The Mac App Store app is installed with Mac OS X version 10.7 and later. If you have an earlier version of Mac OS X, you need to upgrade.)
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注册一个开发者账号（在 iOS Developer Program）Enroll as an Apple Developer in the iOS Developer Program.
在写程序和用模拟器测试时不需要注册。但你确实是需要注册，无论如何，为了可以在设备上测试应用，也为了给多个应用分类。注册可以使你获得在 iOS Dev Center 和 iOS Provisioning Portal 中的足够的使用权。如果你现在注册，可以按照公路图的所有步骤进行开发，包括在一个设备上测试你的应用。You do not need to enroll in the program to write apps and test them in iOS Simulator. You do need to enroll, however, to test apps on devices and to distribute apps. Enrollment gives you full access to the iOS Dev Center and the iOS Provisioning Portal. If you enroll now, you will be able to follow all of the steps in the road map, including testing your app on a device.
