UICollectionView cellForItem called not correctly

Question

Xcode 8.2.1 after migrate Swift 2.2 to Swift 3

UICollectionView\'s cellForItem not called correctly but before migration was working fine

I have CollectionView w

Answer 1

After migrate to Swift 3 from Swift 2.2

UICollectionView In iOS10 prefetch set true (by default)

so cellForItem was not called as linear sequence

I get a hint in this post little bites of cocoa

prefetching is for datasource instead for cell

so somethimes not calling cellForItem(this is for cell) linearly (what i want)

just uncheck prefetching enable it works fine like before migration