Learning Cocoa with Objective-C by Paris Buttfield-Addison & Jonathon Manning
Author:Paris Buttfield-Addison & Jonathon Manning [Paris Buttfield-Addison and Jonathon Manning]
Language: eng
Format: epub
Tags: COMPUTERS / Operating Systems / Macintosh
ISBN: 9781449318789
Publisher: O'Reilly Media
Published: 2012-12-09T16:00:00+00:00
The cell’s primary text label is set to display the text Hello.
Finally, the cell is returned to the table view, which will display it to the user.
Responding to actions
The most common thing that the user does with table view cells is to tap them. When this happens, the table view will contact its delegate and inform it that a cell was selected.
An object must conform to the UITableViewDelegate protocol in order to be a delegate. The table view’s delegate can be different from its data source, but in practice the delegate is the same object as the data source (that is, the view controller that manages the table view conforms to both the UITableViewDelegate and UITableViewDatasource protocols).
There are several methods that UITableViewDelegate specifies, all of which are optional. The most important and commonly used method is tableView:didSelectRowAtIndexPath:, which is called when a row is tapped. This is the delegate’s opportunity to perform an action like moving to another screen.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { // The table view cell at 'indexPath' got selected }
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