iPad编程宝典：打造卓越用户体验

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"《iPhone和iPad开发书籍大全》是一本专注于2010年发布的iPad编程指南，专为iPhone和iPad开发者打造。这本书对于想要深入了解iPad开发环境的开发者来说是宝贵的资源，无论你是初学者还是进阶者，它都能提供所需的核心用户界面和开发技术，帮助你适应这个新兴的iPad应用市场。作者Eric和Daniel在书中并不仅仅罗列类和方法，而是深入剖析了iOS 3.2 SDK中的每个新特性，尤其强调用户体验的重要性。他们指导开发者如何构建不仅速度快、稳定性强，而且充分利用iPad独特功能的应用程序。书中提供了丰富的细节和实例，使得学习过程更具实践性和深度。创始人Raven Zachary，同时也是iPhone Dev Camp和iPad Dev Camp的创办人，推荐这本书作为软件开发者创造新iPad应用或计划将现有iPhone应用移植到iPad平台的重要参考。他认为这本书不仅能引导开发者创建出色的应用，还能提升他们在设计时注重用户体验的能力。 Adrian Kosmaczewski，作为Director at akosmasoftware，高度评价该书，指出它包含了一些其他资源中难以找到的非凡见解和详尽内容，这对于寻求深度理解iPad开发的读者来说是一份不容错过的宝典。《iPhone和iPad开发书籍大全》是一本实用且全面的指南，对于任何希望在iPad开发领域有所建树的开发者来说，无论是初次涉猎还是寻求技术提升，都是一次重要的学习之旅。通过阅读这本书，开发者可以掌握开发策略，提升应用程序质量，并充分利用iPad的创新特性和潜力，从而在竞争激烈的市场中脱颖而出。"

GETTINGSTARTED 16

1.3 Getting Started

In this book, we assume you know how to develop iPhone apps. Maybe

you’ve written an iPhone app or two for fun or proﬁt. Y o u are certainly

familiar with Cocoa, Objective-C, and the iPhone APIs. Y o u are com-

fortable with the most recent versions of Xcode and Interface Builder.

Y o u know how to work with view controllers and delegates and can use

reference counting to manage memory.

That’s where we’ll start.

W e ’ l l create an iPhone app and quickly review some of the key con-

cepts you’ll need to know in this book. These techniques are common

to iPhone and iPad development. Y o u ’ l l see this at the end of the chap-

ter when we convert this from a project that works only on the iPhone

to one that works on both the iPhone and the iPad.

By the end of this chapter, you’ll know whether you have the right

amount of background for this book. Everything should be familiar,

and the quick review should be enough to bring you up to speed for

the remainder of the book. If you ﬁnd yourself confused or think we’re

moving too fast, then you may need to start with a book on Cocoa or

iPhone development.

If you think we’re moving too slowly and you want to get right to the iPad

material, start with the project in the FromTo/DailyShoot1 directory in the

code download, and skip ahead to Section 1.8, Compatibility Mode.

W e ’ l l build a simple navigation-based application around The Daily

Shoot website (http://dailyshoot.com) created by Mike Clark and James

Duncan Davidson. Their site has suggested a daily assignment for pho-

tographers since November 2009. In this type of app, users navigate

through some number of levels of table views until they select an indi-

vidual item and navigate to its detail view.

4. Y o u can start with Cocoa Programming: A Quick-Start Guide for Developers [Ste09]

and/or iPhone SDK Development [DA09].

Report erratum

this copy is (P1.0 printing, September 2010)

Download from Wow! eBook <www.wowebook.com>

ADDINGA MODELOBJECT 18

Start Xcode, and create a new navigation-based application that does

not use Core Data for storage. Name the project DailyShoot.

By the way, you may have noticed some important differences in the

templates you have available. The Split V i e w - b a s e d Application tem-

plate is new and can be used only for iPad-based projects. The Navi-

gation-based Application and Utility Application templates can be used

only for new iPhone projects. The W i n d o w - b a s e d template can create

an iPhone project, an iPad project, or a universal project that targets

both platforms at once. The remaining templates can be used as the

starting point for either iPhone or iPad projects, but you have to specify

which using a drop-down.

W e ’ r e not going to do anything with the app delegate or with the Main-

Window nib. If this were a production app, we would take the time to

change the name of the RootViewController class and the corresponding

nib to something that has more meaning in the current setting. Because

it’s easy to make an error while making these changes and because the

changes have nothing to do with what we’re working on in this chapter,

we’ll leave the names as they are.

1.4 Adding a Model Object

A table view needs a data source that can answer three basic questions:

• How many sections are in the table?

• For each section, how many rows are in this section?

• For each row, what goes in this row?

In the project created for us from the template, the RootViewController is

the table view’s data source. W e ’ r e going to add a model object to our

project. This is the classic Model V i e w Controller (MVC) decoupling. The

view talks to the controller and the controller talks to the model.

UITableView RootViewController Assignments

tableView:

numberOfRowsInSection:

count:

The table view sends the message tableView:numberOfRowsInSection: to

the controller. The controller in turn sends the message count to the

Assignments object, our model object. The model object responds to the

Report erratum

this copy is (P1.0 printing, September 2010)

Download from Wow! eBook <www.wowebook.com>

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