Keeping the contentOffset in a UICollectionView while rotating Interface Orientation

Question

I\'m trying to handle interface orientation changes in a UICollectionViewController. What I\'m trying to achieve is, that I want to have the same contentOffset afte

Answer 1

This work like a charm:

-(CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {
    return self.view.bounds.size;
}

-(void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {

    int currentPage = collectionMedia.contentOffset.x / collectionMedia.bounds.size.width;
    float width = collectionMedia.bounds.size.height;

    [UIView animateWithDuration:duration animations:^{
        [self.collectionMedia setContentOffset:CGPointMake(width * currentPage, 0.0) animated:NO];
        [[self.collectionMedia collectionViewLayout] invalidateLayout];
}];
}