How to Resize Cell Without Reload - Self Resizing (iOS 16)

June 7, 2022
Reading 19 minutes

WWDC 2022 brings a lot of new features. One of them self resizing cell (it supports Collection View and Table View). Now we can easily resize cell with just one line code. Ok, let's see.

iOS 16 has new variable for UICollectionView and UITableView selfSizingInvalidation. Its default value is enabled. If you use UIListContentConfiguration cell automatically resize when the configuration changed. Also, you can resize it whenever you want. This blog is only for manual self resizing. If you use UIListContentConfiguration it updates automatically.

How to resize cell

I create simple collection view and setup.

import UIKit

class ViewController: UIViewController {
    @IBOutlet private weak var collectionView: UICollectionView!

    override func viewDidLoad() {
        collectionView.dataSource = self
        collectionView.register(UINib(nibName: "CustomCollectionViewCell", bundle: .main), forCellWithReuseIdentifier: "CustomCollectionViewCell")
// MARK: - UICollectionViewDataSource
extension ViewController: UICollectionViewDataSource {
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 50

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        collectionView.dequeueReusableCell(withReuseIdentifier: "CustomCollectionViewCell", for: indexPath)

Also here is Cell. After cell awake random seconds later it updates and I called invalidateIntrinsicContentSize function. Cell resize with animation.

import UIKit

class CustomCollectionViewCell: UICollectionViewCell {
    @IBOutlet private weak var stackView: UIStackView!
    @IBOutlet private weak var label: UILabel!

    private let lorems: [String] = [
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        "It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using 'Content here, content here', making it look like readable English. Many desktop publishing packages and web page editors now use Lorem Ipsum as their default model text, and a search for 'lorem ipsum' will uncover many web sites still in their infancy. Various versions have evolved over the years, sometimes by accident, sometimes on purpose (injected humour and the like).",
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    override func awakeFromNib() {

        DispatchQueue.main.asyncAfter(deadline: .now() + ([1.0, 2.0, 3.0].randomElement() ?? 1.0)) { [weak self] in
            self?.label.text = self?.lorems.randomElement() ?? ""

            // Manually self resize

Also you can disable animation:

// Manually self resize
UIView.performWithoutAnimation {

Note: Xcode 14 beta-1 has a glitch when used without animation self resizing.