this is my very first question. My Eng is not good so i hope i can make my question clearly as possible.
My app use an UICollectionView to display photos download from my remote server. I set a light gray image for it as place holder and when the photo finished download i set it with transition method:
[UIView transitionWithView:cellNeedReload.photo duration:0.3 options:UIViewAnimationOptionTransitionCrossDissolve animations:^{
cellNeedReload.photo.image = downloader.photo.image;
} completion:nil];
In my code above, i wrote it in a completionBlock nsoperation. It works perfect but not synchronized and my grid have some lags when scrolling with many photos in animations. How to optimize it ?
I see some apps like Pinterest have very smooth grid in transition.
