reloadData

reloadData is a method in iOS development used to refresh the data displayed in UITableView or UICollectionView components. It reloads all the cells and sections by calling the data source methods again, ensuring the UI reflects the current data state. This is essential for updating table or collection views after underlying data changes.

Also known as: reloadData(), reload data, reloadData method, UITableView reloadData, UICollectionView reloadData

Why learn reloadData?

Developers should use reloadData when they need to update the entire content of a UITableView or UICollectionView, such as after fetching new data from a network request or modifying a dataset. It's particularly useful for ensuring consistency between the data model and the UI, but for performance reasons, consider using more targeted methods like reloadRows or reloadSections for partial updates.

Learning Resources

• docs: Apple Documentation: UITableView reloadData
• docs: Apple Documentation: UICollectionView reloadData
• tutorial: Hacking with Swift: How to reload a table view
• tutorial: Ray Wenderlich: UICollectionView Tutorial
• video: YouTube: iOS TableView ReloadData Explained