How do I implement diffable data sources for UITableView in Swift?

Implementing diffable data sources for UITableView in Swift allows for a more efficient way of managing and updating your table view's data without the need for manual cell updates. Below is an example of how to achieve this using Swift's new UITableViewDiffableDataSource.

To get started, ensure you are using iOS 13.0 or later as diffable data sources were introduced in this version.

Here’s a simple example of how to implement a diffable data source with a UITableView:

import UIKit class ViewController: UIViewController { var tableView: UITableView! var dataSource: UITableViewDiffableDataSource! override func viewDidLoad() { super.viewDidLoad() tableView = UITableView(frame: view.bounds) view.addSubview(tableView) tableView.register(UITableViewCell.self, forCellReuseIdentifier: "cell") configureDataSource() applyInitialSnapshot() } func configureDataSource() { dataSource = UITableViewDiffableDataSource(tableView: tableView) { (tableView: UITableView, indexPath: IndexPath, identifier: String) -> UITableViewCell? in let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) cell.textLabel?.text = identifier return cell } } func applyInitialSnapshot() { var snapshot = NSDiffableDataSourceSnapshot() snapshot.appendSections([0]) snapshot.appendItems(["Item 1", "Item 2", "Item 3"]) dataSource.apply(snapshot, animatingDifferences: false) } }

UITableView diffable data sources iOS development Swift UITableViewDiffableDataSource

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