How to resize UICollectionViewCell on iPhone 6 and 6 Plus using autorun

Question

I work in an iOS project where I use collectionView using Autolayout and SizeClasses. uses custom UICollectionViewCell xib. Where I reuse a custom cell in a collectionView representing two cells, such as the image below in iPhone 5s.

a problem when starting the same project on the iPhone 6 and 6 Plus, the cells do not change the size of the space between the cells, which you can see below.

which resizes in xib when the cell size increases and selects update frames, but does not resize for iPhone 6.

Responses provided by other SO posts did not help.

Answer 1

A mathematical trick calls the square root Number 33 = number of objects! You can configure it regardless of the total number of items for calibration and the legs of more or less items on the screen !!! For example, / (Double (33)) on iPhone 4 will process 33 items in 4 columns and 4 items in a row! in iPhone 6 Plus you will see that the same cameras will scale, observing 4 columns! If you put 1, you will get one full-width cell on any device screen!

// ...........returning cell size based on device screen size by calculating square roo func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize { let deviceSize = UIScreen.mainScreen().bounds.size let flexSize = sqrt(Double(deviceSize.width * deviceSize.height) / (Double(33))) return CGSize(width: flexSize , height: flexSize) }