![]() ![]() Our data array which corresponds to the number of total cells we want. Since we only have one section, we simply return the length of Is responsible for telling the UITableView how many rows are in each section We implement the two required methods in the UITableViewDataSource protocol:įunc tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int Implement UITableViewDataSource or UITableViewDelegate in more complex Using UIKit delegates, but you may want to create a separate class to In this case, since the only view managed by our ViewController is the table, weĪlso have our ViewController implement UITableViewDataSource so that all theĬode for this screen is in one place. Your UITableView, the first thing to check is that you have set your If something is not behaving the way you expect with Table is forgetting to set the dataSource or delegate property on your A common error that will result in a blank or misbehaving UITableView in your storyboard, you will see something like this when running import UIKit class ViewController : UIViewController, UITableViewDataSource that the tableView has been connected to a The following is the most basic way to set up a UITableView. Practice you will almost always want to do something that requires implementing ![]() It is not technically mandatory for you provide your own delegate, but in This objectĬontrols the basic visual appearance of and user interactions with the table. The delegate property must be set to an object that implements This object is responsible for the content of the table including providing theĪctual UITableViewCells that will be shown. Implements the UITableViewDataSource protocol. The dataSource property must be set to an object that The UITableView has two delegates that you must provide by setting theĬorresponding properties on your UITableView object. ![]() UITableView you provide it with delegates that areĪble to answer questions about what to show in the table and how theĪpplication should respond to user interactions with the table. The dataSource and delegate propertiesĪs with other views in the UIKit framework, in order to use a If you need to layout other views in the same screen. it already implements the UITableViewDataSourceĪnd UITableViewDelegate protocols), but the requirement that your viewĬontroller's root view be a UITableView ends up being too inflexible UITableViewController is a built-in view controller class that has its You'll notice that in the Object Library there are two objects: Table This guide assumes that you are able to properly instantiate and obtainĪ reference to a UITableView. Of course, you can also programmatically instantiate a UITableView andĪdd it as a subview to your view controller's root view. Control-dragging in the Assistant Editor from the Storyboard to the ViewController.m is a common way to do this. That you have a reference to your UITableView in your viewĬontroller's code. Library onto your view controller and then creating an so In Interface Builder simply by dragging a UITableView from the Object When working with storyboards, this can be done In order to use a UITableView, you must first add one to your viewĬontroller's root view. A moreĬomprehensive guide by Apple (written for Objective-C) can found Should be easy to adapt for an Objective-C project. All our examples are provided in Swift, but they This guide covers typical use cases and common issues that arise when Such as scrolling, selecting rows, editing the table's contents, andĪnimating the addition or removal of rows. They also have built-in facilities for handling common behavior UITableViews can be highly performant, displaying thousands of rows ofĭata. They are used to display grouped lists of cells. UITableViews are one of the most commonly used views in Add a loading view to your view controller.Update progress to indicate with UI when data is being requested.Define the conditions for requesting more data.How to bind actions to changes in scrolling.Propagating events from within a custom cell.Insert the refresh control into the list. ![]()
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