What are the differences between UITableView and UICollectionView components in iOS, and in which cases is it preferable to use each of them?

UITableView and UICollectionView are components for displaying lists and collections of items in iOS, but they have different features:

• UITableView displays data in a single column with vertical scrolling. Suitable for lists with a uniform cell structure, such as contacts or messages.

• UICollectionView is more flexible and allows creating grids, horizontal lists, and complex layouts with varying sizes and arrangements of cells.

When to use:

• If a simple vertical list is needed — UITableView.
• If a grid, horizontal scroll, or custom layout is required — UICollectionView.

Example: an image gallery is usually implemented using UICollectionView, while an email list is implemented with UITableView.