UITableView and UITableViewController - iOS Programming: The Big Nerd Ranch Guide - page 297

value for the number of rows that the UITableView should display. In the table view
for Homepwner , there should be a row for each entry in the store ( Figure 9.11 ).
Figure 9.11 Obtaining the number of rows
In ItemsViewController.m , implement
tableView:numberOfRowsInSection: . This method returns the number of rows
to display as an NSInteger , which is just another name for int .
- (NSInteger)tableView:(UITableView *)tableView
numberOfRowsInSection:(NSInteger)section
{
return [[[BNRItemStore sharedStore] allItems] count];
}
Wondering about the section that this method refers to? Table views can be broken up into
sections, and each section has its own set of rows. For example, in the address book, all
names beginning with “D” are grouped together in a section. By default, a table view has
one section, and in this chapter, we will work with only one. Once you understand how a
table view works, it is not hard to use multiple sections. In fact, using sections is the first
challenge at the end of this chapter.
The second required method in the UITableViewDataSource protocol is
tableView:cellForRowAtIndexPath: . To implement this method, we'll need to
learn about another class - UITableViewCell .