Animate uicollectionview cells on selection

Question

I have created a customlayout and set my cells position attribute in layoutAttributesForItemAtIndexPath like this

attributes.center = CGPointMake         


        

Answer 1

I'm animating the attributes by using didSelectItemAtIndexPath in my UICollectionViewDelegate:

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
    [_collectionView.collectionViewLayout invalidateLayout];
    UICollectionViewLayoutAttributes *newAttributes = [_collectionView layoutAttributesForItemAtIndexPath:indexPath];

    //use new attributes for animation
}