flowlayout – Tarik Billa

UICollectionView animating cell size change causes undesired behavior

July 27, 2023 by Tarik

This is a UICollectionViewFlowLayout bug, but there is a workaround. The problem is that the attributes returned by initialLayoutAttributesForAppearingItemAtIndexPath: have the wrong frames. Specifically, they have the frames of the final, on screen position rather than the initial, off screen position. You just need to override this method and return correct frames. The basic structure … Read more

Swift: How to refresh UICollectionView layout after rotation of the device

January 27, 2023 by Tarik

Add this function: override func viewDidLayoutSubviews() { super.viewDidLayoutSubviews() myCollection.collectionViewLayout.invalidateLayout() } When you change the orientation, this function would be called.

How to set UICollectionViewDelegateFlowLayout?

December 21, 2022 by Tarik

Just self.collectionView.delegate = self;. Note that UICollectionViewDelegateFlowLayout inherits from UICollectionViewDelegate. I admit it caught me off guard at first. Oh and this will only work if self.collectionView.collectionViewLayout is actually set to your flow layout. (or set with initWithFrame:collectionViewLayout:)