Question

I have UIScrollView with label. I am getting touch events coordinates. When user is clicking on screen i am storing the click coordinates in variable, then i want to scroll the view (using something like [myScrollView setContentOffset]) in such a way so the y coordinate of the clicked point will become a center of my view, so when you clicking on some text it will autoscroll to the center of the screen. I am not sure how to workout the math of this…

Any help highly appreciated!

Answer 1

UIScrollView *aScrollView;      
CGPoint touchPoint;
[aScrollView scrollRectToVisible:CGRectMake(touchPoint.x - roundf(aScrollView.frame.size.width/2.),
                                                  touchPoint.y - roundf(aScrollView.frame.size.height/2.), 
                                                  aScrollView.frame.size.width, 
                                                  aScrollView.frame.size.height)  
                                                  animated:YES];

Should work.