Objective-C Fundamentals

30 CHAPTER 2 Data types, variables, and constants
Figure 2.2 The main project window in Xcode immediately after creating the Rental Manager application using
the Navigation-based Application template
View-based Application (as in the Coin Toss project from chapter 1). The Navigationbased
Application template inserts a few user interface elements, such as a distinctive
blue navigation bar at the top. As the Rental Manager application develops, you’ll
extend the various features provided, but for now, let’s concentrate on adding the
ability to display a list of rental properties.
When you run the application, you may notice that the white background is
divided into a number of rows by light gray lines, and by using your finger, you can
slide the list up and down. This control was added by the project template and is
called a UITableView. To display data in this control, you must write a small amount of
code to specify how many rows it should add and what each row contains.
Select the file named RootViewController.m and open it for editing. The project
template has inserted a fair amount of source code into this file for your convenience
(although, at present, most of it’s commented out).
Locate the two methods named tableView:numberOfRowsInSection: and
tableView:cellForRowAtIndexPath: and replace them with the code in the following
listing.