wz366 wz366 - 3 months ago 36
iOS Question

When to use UICollectionView instead of UITableView?

I found that

UICollectionView
is like an upgraded version of
UITableView
introduced in iOS6, but when should I choose
UICollectionView
instead of
UITableView
?

There are still Apps using
UITableView
, if
UICollectionView
can do anything
UITableView
can do , why people still use
UITableView
? Is there a difference as far as performance is concerned?

Thanks!

Answer

That depends on the requirements. How the application flows determines which type of UI to integrate into the application.

People mainly use the UICollectionview for creating types of UIs with multiple images shown in a grid. This would have complex logic using UITableView, but with UICollectionview, it would be easy.

When using UICollectionview, you don't need to set buttons with tags or other things by getting selected items values. You can simply get -(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath and in UITableViewDelegate:

`-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath`

You get the selected row instead of the item, so for creating grid or modified items, using UICollectionview is best.

For the listing details of each item, people use UITableView because it shows more info on each item.

Apple Docs:

UICollectionView Class Reference

The UICollectionView class manages an ordered collection of data items and presents them using customizable layouts. Collection views provide the same general function as table views except that a collection view is able to support more than just single-column layouts. Collection views support customizable layouts that can be used to implement multi-column grids, tiled layouts, circular layouts, and many more. You can even change the layout of a collection view dynamically if you want.

UITableView Class Reference

A table view displays a list of items in a single column. UITableView is a subclass of UIScrollView, which allows users to scroll through the table, although UITableView allows vertical scrolling only. The cells comprising the individual items of the table are UITableViewCell objects; UITableView uses these objects to draw the visible rows of the table. Cells have content—titles and images—and can have, near the right edge, accessory views. Standard accessory views are disclosure indicators or detail disclosure buttons; the former leads to the next level in a data hierarchy and the latter leads to a detailed view of a selected item. Accessory views can also be framework controls, such as switches and sliders, or can be custom views. Table views can enter an editing mode where users can insert, delete, and reorder rows of the table.