iOS Parallax Scrolling effect (like in Yahoo News Digest app)

Question

I would like to know how to implement parallax scrolling similar to Yahoo News Digest app. In which when user scroll horizontally background image scrolls in a different speed w

Answer 1

100% working and dam easy

Take a view on imageview exactly size of image view. by default alpha for view set 0.

//MARK: Scroll View Delegate methods
-(void)scrollViewDidScroll:(UIScrollView *)scrollView{

  NSLog(@"X: %f Y: %f",scrollView.contentOffset.x,scrollView.contentOffset.y);

CGFloat scrollY = _mainScrollView.contentOffset.y;
CGFloat height = _alphaView.frame.size.height;

CGFloat alphaMonitor = scrollY/height;

_alphaView.alpha = alphaMonitor;
}