ios - "Lazy Drawing" of UICollectionView cells -


this question isn't lazy loading of images, can no problem. have here issue each cell has complex drawing of gradients, etc, causes collectionview noticeably stutter each cell drawn (when scrolling more quickly). i'd somehow draw when scrolling or when user stops scrolling. tried doing drawing using nsoperationqueue (& cancelling when cell went off screen) worse ever.

if has advice approach, i'd grateful.

have tried approach building concurrent user interfaces on ios wwdc 2012? show similar example , explain how move drawing background thread.


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