Page count of UICollectionView with paging in iOS

Question

Consider a UICollectionView with flow layout and paging enabled (by setting pagingEnabled to YES).

What would be the simplest

Answer 1

If the UICollectionView scrolls horizontally, you divide its contentSize's width to its frame's width:

int pages = floor(self.collectionView.contentSize.width /    
                  self.collectionView.frame.size.width) + 1;

If it scrolls vertically, you divide its contentSize's height to its frame's height:

int pages = floor(self.collectionView.contentSize.height /    
                  self.collectionView.frame.size.height) + 1;