-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
    CGFloat pageWidth = self.scrollview.bounds.size.width;
    curIndex = floor((self.scrollview.contentOffset.x - pageWidth / 2) / pageWidth) + 1;

    if (curIndex == lastIndex) return;

    lastIndex = curIndex;
    //increment pager and do whatever else...
}