UICollectionView performance - _updateVisibleCellsNow

Question

I\'m working on a custom UICollectionViewLayout that displays cells organized by day/week/month.

It is not scrolling smooth, and it looks like the lag i

Answer 1

Thought I would quickly give my solution, as I faced a very similar issue - image-based UICollectionView.

In the project I was working in, I was fetching images via network, caching it locally on device, and then re-loading the cached image during scrolling.

My flaw was that I wasn't loading cached images in a background thread.

Once I did put my [UIImage imageWithContentsOfFile:imageLocation]; into a background thread (and then applied it to my imageView via my main thread), my FPS and scrolling was a whole lot better.

If you haven't tried it yet, definitely give a go.