why it seems so slow when updating collection view using reloadItems at IndexPath method?

Asked Jan 16 '19 at 07:59

Active Jan 16 '19 at 08:02

Viewed 190 times

so usually I use collectionView.reloadData() to update all data available, it will reload data in all the cells. But I need to update only particular cell on my collection view, so I use collectionView.reloadItems(at: [selectedIndexPath])

but it seems so slow like the gif file in here: http://g.recordit.co/3z14J3bR7X.gif

as you can see, the thumb icon seems as if have 'animation' with duration 0.2s, it seems slow, even though I don't have it on my code. I want to get rid of that 'animation effect' if I use collectionView.reloadItems(at: [selectedIndexPath])

If I change using collectionView.reloadData() that 'animation effect' does not appear, but for some reasons, I can't use collectionView.reloadData()

so, how to solve this issue, why this happen ?

edited Jan 16 '19 at 08:02

asked Jan 16 '19 at 07:59

Alexa289

4,133
5
32
81

Use dispatch main queue – Kathiresan Murugan Jan 16 '19 at 08:01
1

Hmmm... have you tried wrapping your call to `reloadItems(at:)` inside a `UIView.performWithAnimation` closure, as in the following answer? https://stackoverflow.com/a/25403881/988260 – Tyler Jan 16 '19 at 08:14
@TylerTheCompiler thanks, yes, thats the answer. using 'UIView.performWithAnimation' – Alexa289 Jan 16 '19 at 09:08
Oh okay cool. I'll mark this as a duplicate of that question then. – Tyler Jan 16 '19 at 09:17

why it seems so slow when updating collection view using reloadItems at IndexPath method?

0 Answers0