How to set UiScrollView Frame on click of UIButton in Iphone?

Question

I have UIScrollView on which I am using 2 UIButtons. UIScrollView initial frame is (0,0,768,1024). I want when I click on first button the UIScrollView y-cordinate position will be 500, means it will scrolldown 500 positions below to its actual position.

And when I click second Button which Will show on UIScrollView, Position Y-cordinate of UIScrollView y=535, then UIScrollView Move up to Position y= 0 again.

First button click UIScrollView y = 500 Second button click UIScrollView y = 0

Any hints from experts would be very welcome.

Answer 1

Maybe you do not want to change the frame of the scroll view (this would just displace the whole view), but the contentOffset. This can be animated, too.

CGPoint offset = scrollView.contentOffset;
offset.y += 500;
[scrollView setContentOffset:offset animated:YES];