What is difference between Tableview and collection?

Table view presents data in multiple rows arranged in a single column, the cell design is fit as a row. However, collection view can create rows and columns, it can design cells in various ways, even if they are not necessarily rows.

How does UICollectionView work?

The collection view presents items onscreen using a cell, which is an instance of the UICollectionViewCell class that your data source configures and provides. In addition to its cells, a collection view can present data using other types of views.

What is UICollectionReusableView?

A view that defines the behavior for all cells and supplementary views presented by a collection view.

What is CollectionView?

Overview. A collection view manages an ordered set of content, such as the grid of photos in the Photos app, and presents it visually. Collection views are a collaboration between many different objects, including: Cells. A cell provides the visual representation for each piece of your content.

What is compositional layout?

Compositional layouts are a declarative kind of API that allows us to build large layouts by stitching together smaller layout groups. Compositional layouts have a hierarchy that consists of: Item , Group , Section , and Layout .

What is the difference between UITableView and UICollectionView?

UITableView is the base mechanism for displaying sets of data on iOS. UICollectionView is a much more powerful set of classes that allow modifying almost every aspect of how your data will appear on the screen, especially its layout but also other things.

How do I create a collection view?

Starting Your Collection. Open Main. storyboard and drag in a Collection View Controller. Go to Editor ▸ Embed in ▸ Navigation Controller to create a navigation controller and automatically set the collection view controller as the root.

What is UICollectionView supplementary view?

Supplementary views are more related to your data. The collection view layout still decides where to put them, but they are provided by the collection view data source, just like regular cells.

What is Uicollectionviewflowlayout?

A layout object that organizes items into a grid with optional header and footer views for each section. iOS 6.0+ iPadOS 6.0+

Is UITableView deprecated?

It’s already well known that UITableView class has become obsolete, and even Apple admits it. It’s poorly customizable and has a variety of issues related to auto-resizing cells, autolayout, etc.

What do you need to know about uicollectionviewcompositionallayout?

At WWDC 2019, Apple introduced and later documented an unbelievable API for building complex layouts with ease. UICollectionViewCompositionalLayout promised to simplify collection view layouts using a more declarative approach without the need to subclass to achieve customization—and it delivered.

How to configure a uicollectionview in iOS 13?

Before iOS 13, you’d configure a UICollectionView ‘s data source by adopting UICollectionViewDataSource. This protocol tells the collection view what cell to display, how many cells to display, which section to display the cells in, and so on.

How to create a grid with uicollectionview?

A basic grid built with UICollectionViewFlowLayout. Our flow layout and compositional layout will use the exact same data source. It’s just a standard, everyday UICollectionViewDataSource that returns a cell for each square photo we want to display. The photos are categorized into sections, but that won’t come into play just yet.

How is data prefetching used in uicollectionview?

UICollectionView provides two prefetching techniques you can use to improve responsiveness: Cell prefetching prepares cells in advance of the time they are required. Data prefetching provides a mechanism whereby you are notified of the data requirements of a collection view in advance of the requests for cells.