A collection manages an ordered set of content, such as a set of photos, and presents it in a customizable and highly visual layout. Because a collection doesn’t enforce a strictly linear format, it’s particularly well-suited to displaying items that vary in size. Generally speaking, collections are ideal for showing off image-based content.
Avoid creating radical new designs when a standard row or grid layout is sufficient. A collection should enhance the user experience, not become the center of attention.
Make it easy to focus on an item. If it’s too difficult to get to an item in your collection, people will get frustrated and lose interest before reaching the content they want. Use adequate padding around images to keep focus clear and prevent overlapping of content.
Consider using a table view instead of a collection for text. On a TV screen, it’s generally simpler and more efficient to view and digest textual information when it’s displayed in a scrollable list.
For developer guidance, see UICollectionViewController.