Detect page change in UICollectionView

Question

I tried finding this question for a while but could not find this problem\'s answer. My problem is that i have a UICollectionView and the Scroll Direction is

Answer 1

You can get the current page like below, index will be from 0 to (total page - 1)

-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
 {
    CGFloat pageWidth = scrollView.frame.size.width;
    int page = floor((scrollView.contentOffset.x - pageWidth / 2) / pageWidth) + 1;
    NSLog(@"Current page -> %d",page);
}