Prevent zoom-out in scroll view to mess up with the view component alignment

gistfile1.txt

- (void)scrollViewWillBeginZooming:(UIScrollView *)scrollView withView:(UIView *)view
{
    if(scrollView == _scrollView && view == _contentView)
    {
        // Setting ivars for scrollViewDidZoom
        _contentOffsetBeforeZoom = _scrollView.contentOffset;
        _scrollViewBoundsBeforeZoom = _scrollView.bounds;
    }
}

- (void)scrollViewDidZoom:(UIScrollView *)scrollView
{
    if(scrollView == _scrollView)
    {
        // If you zoom out, there are cases where ScrollView content size becomes smaller than original,
        // even though minimum zoom scale = 1. In that case, it will mess with the contentOffset as well.
        if(_scrollView.contentSize.width < CONTENT_WIDTH || _scrollView.contentSize.height < CONTENT_HEIGHT)
        {
            _scrollView.contentSize = CGSizeMake(CONTENT_WIDTH, CONTENT_HEIGHT);
            _scrollView.contentOffset = _contentOffsetBeforeZoom;
        }

        // If you zoom out, there are cases where ScrollView bounds goes outsize of contentSize rectangle.
        if(_scrollView.bounds.origin.x + _scrollView.bounds.size.width > _scrollView.contentSize.width ||
           _scrollView.bounds.origin.y + _scrollView.bounds.size.height > _scrollView.contentSize.height)
        {
            _scrollView.bounds = _scrollViewBoundsBeforeZoom;
        }
    }
}