利用MonoTouch开发iPhone和iPad的C#应用程序教程

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"《利用MonoTouch开发iPhone和iPad的C#应用程序》是一本专为.NET开发者设计的iOS应用开发指南，作者Bryan Costanich带领读者从入门到精通。本书不仅讲解了如何使用C#语言在Apple的移动设备上构建功能丰富的应用程序，还深入探讨了MVC（Model-View-Controller）模式的应用、多屏幕应用程序的设计、针对iPad和通用应用的区别处理、视图和控制器的深入理解、各种控件的使用，包括标准控件和内容控件，以及表格、键盘处理、多任务管理、触摸事件、共享资源管理和用户及应用程序设置等核心主题。第1章引导读者快速入门MonoTouch，介绍开发环境的搭建和基本概念。第二章通过实例展示了创建第一个C#应用程序的过程，让读者掌握基础开发流程。第三章深入解析MVC模式在iOS开发中的实践，有助于设计模块化的应用程序架构。第4章特别关注iPad和通用应用的开发策略，帮助开发者理解和应对不同平台的需求。第五章和第六章分别聚焦于视图和控制器的详细讲解，强调这两个关键组件在构建用户界面时的重要性。第七至十章则分别涵盖了标准控件、内容控件、表格数据展示和键盘交互的高级技巧。第11章探讨了iOS中的多任务处理，这对于优化用户体验和提高应用程序性能至关重要。第12章深入研究触摸事件，使开发者能够更好地响应用户的触屏操作。第13章介绍了如何在多个设备间共享资源，确保跨平台的一致性。最后两章关注用户设置和应用设置的管理，提升应用程序的个性化和可定制性。总体而言，这本书为.NET背景的程序员提供了一个全面的工具，让他们能够充分利用C#语言在iPhone和iPad平台上开发出高效、兼容的移动应用。无论是初学者还是有经验的开发者，都能从中收获宝贵的知识和实战经验。"

CHAPTER 2: Our First Application

Figure 2–3. MonoDevelop new solution dialogue window

Again, this is very similar to Visual Studio’s dialog for creating new solutions. Click OK,

and you should now have a solution view that looks something like the one in Figure 2–4

(note, I’ve expanded the arrows in the solution view to show all the files and references).

Figure 2–4. The solution window

CHAPTER 2: Our First Application

There are two classes in here: the Application class and the AppDelegate class. This is

where things start to get a little different from traditional .NET GUI development.

The way iOS applications work is that your application class contains all your Windows,

Views, Controls, Resources, etc., and then you have an application delegate class

(derived from UIApplicationDelegate) that handles application lifecycle and runtime

events.

Lifecycle events include things like application startup and shutdown, and runtime

events include things like low memory warnings and device orientation changes.

By handling these events in your application delegate class, you have an opportunity to

respond to them. For instance, when your application is shutting down, the

WillTerminate method is called on your application delegate, and you have an

opportunity to save any user data, application state, etc.

In our Application class, we have a Main method. By calling UIApplication.Main, the

Objective-C runtime will look for your MainWindow.xib file (which contains the name of

your UIApplicationDelegate class), instantiate your Application class (as a Singleton)

and then start calling lifecycle events on your AppDelegate class.

NOTE: You don’t have to name your primary window (also known as the Main Interface

File) MainWindow.xib. You can name it whatever you want, but you have to tell the build

system to look for whatever file you create. If you want it to look for a different file, open up the

project options by right-clicking on your project file, click Options, and then in Build  iPhone

Application  Main Interface File, set that to whatever .xib file you want to be your primary

window. The Objective-C runtime will then try to load that window when your application runs,

and will find your application delegate from the setting in that file.

Additionally, you can name your application delegate class whatever you want. By default it is

called AppDelegate. To change it, open your Main Interface File in Interface Builder, and

change the name of your Application Delegate.

Furthermore, you don’t even need to define your window in a xib file at all. In fact, as a standard

practice, I never define my window in a xib. It’s easier to just do it programmatically. In Chapter 4,

we’ll look at how to do exactly that.

We’ll come back to our Main.cs file in a bit, but first let's dig into the actual GUI of the

application.

Interface Builder

So far we’ve seen a little bit of the code side of our iPhone application, let's dive into

building the interface. Apple’s application design toolset is called Interface Builder.

Interface Builder is loosely coupled to your development environment. It creates xib files

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