这个程序不仅支持用户界面的拖放创建功能，还允许开发人员以图形的方式将UI控件 “连接”到底层应用程序控制器上的方法。
This program not only enables drag-and-drop creation of user interfaces, but also allows developers to visually "wire" the UI controls to methods on the underlying application controllers.
应用程序的主要层是数据库、持久性框架、数据库访问对象和用户界面(UI)控制器及视图层。
The main layers of the application are a database, a persistence framework, a database access object, and user interface (UI) controller and view layers.
如果想在iPhone应用程序中显示不同的界面，你要创建新的视图，并用视图控制器把其“推”到前端。
If you want different "screens" on an iPhone app, you create new views, and have a view controller push them into the front.
在这篇文章中，我们将要创建另外一个简单的应用程序，不过这次要学习下如何使用Views(视图)和ViewControllers(视图控制器)来创建一个具有多个界面的应用程序。
In this article we're going to make another simple application, but this time we're going to explore using Views and View Controllers to make an application with more than one screen.
模型是应用程序对象，视图是屏幕介绍，控制器其定义了用户在输入之前界面做出反应的方法。
TheModel is the application object, the View is its screen presentation, and theController defines the way the user interface reacts to user input.
模型是应用程序对象，视图是屏幕介绍，控制器其定义了用户在输入之前界面做出反应的方法。
TheModel is the application object, the View is its screen presentation, and theController defines the way the user interface reacts to user input.
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