sizeForItemAtIndexPath is not found in different swift versions

Question

I am using UICollectionView but following method not found:

 func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize

please suggest me it's replacement.

Answer 1

This is the new syntax for that:

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {

}