UICollectionView: current index path for page control

ios objective-c pagination uicollectionview uipagecontrol
hzxu picture hzxu · Dec 17, 2013 · Viewed 49.6k times · Source

I'm using a UICollectionView with a flow layout to show a list of cells, I also have a page control to indicate current page, but there seems to be no way to get current index path, I know I can get visible cells:

UICollectionView current visible cell index

however there can be more than one visible cells, even if each of my cells occupies full width of the screen, if I scroll it to have two halves of two cells, then they are both visible, so is there a way to get only one current visible cell's index?

Thanks

Answer

andykkt picture andykkt · Dec 17, 2013

You can get the current index by monitoring contentOffset in scrollViewDidScroll delegate

it will be something like this

-(void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    NSInteger currentIndex = self.collectionView.contentOffset.x / self.collectionView.frame.size.width;

}

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