NEW: Subscribe to Hacking with Swift+ and accelerate your learning! >>

How to register a cell for UICollectionView reuse

Swift version: 5.2

Paul Hudson    @twostraws   

If you're working entirely in code, you can register a UICollectionViewCell subclass for use with your collection view, so that new cells are dequeued and re-use automatically by the system.

Here's the most basic form of this technique:

collectionView.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "Cell")

That registers a basic collection view cell, which you can then customize in code if you want to. You can then dequeue a cell with this:

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath)
    return cell
}

If a cell doesn't already exist that can be re-used, a new one will be created automatically.

As you might imagine, you will most of the time want to create your own custom UICollectionViewCell subclass and use that instead, but the code is the same – just use your class name instead.

If you're working with Interface Builder, all this work is done for you by creating prototype cells.

Hacking with Swift is sponsored by Instabug

SPONSORED Are you tired of wasting time debugging your Swift app? Instabug’s SDK is here to help you minimize debugging time by providing you with complete device details, network logs, and reproduction steps with every bug report. All data is attached automatically, and it only takes a line of code to setup. Start your free trial now and get 3 months off exclusively for the Hacking with Swift Community.

Start your free trial!

Sponsor Hacking with Swift and reach the world's largest Swift community!

Available from iOS 6.0

Similar solutions…

About the Swift Knowledge Base

This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.

BUY OUR BOOKS
Buy Pro Swift Buy Swift Design Patterns Buy Testing Swift Buy Hacking with iOS Buy Swift Coding Challenges Buy Swift on Sundays Volume One Buy Server-Side Swift (Vapor Edition) Buy Advanced iOS Volume One Buy Advanced iOS Volume Two Buy Advanced iOS Volume Three Buy Hacking with watchOS Buy Hacking with tvOS Buy Hacking with macOS Buy Dive Into SpriteKit Buy Swift in Sixty Seconds Buy Objective-C for Swift Developers Buy Server-Side Swift (Kitura Edition) Buy Beyond Code

Was this page useful? Let us know!

Average rating: 4.4/5

Link copied to your pasteboard.