By Donald H. McCunn
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With a wealthy set of over 1,000 new APIs, iPhone SDK for iPhone OS three presents an grand diversity of applied sciences to reinforce the performance of iPhone and iPod contact purposes. This publication takes an introductory examine Objective-C and Cocoa prior to relocating directly to the instruments you are going to use to create iPhone functions.
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The other options in this dialog allow you to specify the project to contain your new class and the build target to compile your fi le. Leave both of these options at their defaults and click Finish to have Xcode generate your new class fi le. indd 8 9/18/10 11:06:38 AM Building a Simple Data- Driven Application ❘ 9 Implementing Your Data Model Class In order for your class to serve data to the TableView, you’ll need a method to return the requested data. So, let’s create an interface method called getNameAtIndex that will return the name from the model that corresponds with the index that is passed in.
Indd 19 9/20/10 2:31:19 PM 20 ❘ CHAPTER 2 THE IPHONE AND IPAD DATABASE: SQLITE To use SQLite, you will fi rst learn to create a database using the command-line application provided with Mac OS X. This tool will enable you to create the schema of your database, populate it with data, and perform queries. Next, you will learn how to deploy your database with an iPhone application, connect to it in code, and display the results or your SQL queries. By the end of the chapter, you will know how to build a fully functional database application that can be used to view data that has a master-detail relationship: in this case, a product catalog.
Indd 13 9/18/10 11:07:01 AM 14 ❘ CHAPTER 1 INTRODUCING DATA-DRIVEN APPLICATIONS Now that you have an initialized model ready to go, you can implement the required UITableViewDataSource protocol methods. You can see from the compiler warnings that the methods that you need to implement are cellForRowAtIndexPath and numberOfRowsInSection. The numberOfRowsInSection method tells the TableView how many rows to display in the current section. You can divide a TableView into multiple sections. In the Contacts application, a letter of the alphabet precedes each section.
Computer Programming for the Complete Idiot by Donald H. McCunn