Reset scroll on UICollectionView

Question

I have a horizontal UICollectionView which works fine and scrolls. When I tap an item I update my data and call reloadData. This works and the new data is displayed in the UICollectionView. The problem is the scroll position doesn't change and it is still viewing the last place. I want to reset the scrolling to the top (Or left in my case). How can I do this?

Answer 1

CGPointZero in my case shifted the content of the collection view because you are not taking in count the content inset. This is what it worked for me:

    CGPoint topOffest = CGPointMake(0,-self.collectionView.contentInset.top);
    [self.collectionView setContentOffset:topOffest animated:YES];

Answer 2

You can use this method to scroll to any item you want:

- (void)scrollToItemAtIndexPath:(NSIndexPath *)indexPath 
               atScrollPosition:(UICollectionViewScrollPosition)scrollPosition 
                       animated:(BOOL)animated