Question

I have got an UIScrollView that contain UIImageView.
I need to zoom my UIImageView.

I’m using method below:

- (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(float)scale

- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView {
    return imageView; // my UIImage about I describe here.
}

In viewDidLoad method I set frame for my UIImageView (e.g. NSRect: {{110, 180}, {100, 100}})

NSLog(@"image view frame %@", [NSValue valueWithCGRect:self.imageView.frame]);

in this case in log out this value: image view frame NSRect: {{110, 180}, {100, 100}}

but when I try to out put frame of imageView after zoom I get new value with a next amount:

{{9.9999971, 9.9999971}, {100.00001, 100.00001}}

And I don’t understand why I get this value 9.9999971. What I mean. Yes I know that after zoom we change our coordinate, but I dont understand why we get not a 9.0f instead 9.9999971 and why not 100.0 instead 100.00001

Answer 1

I have implemented demo code of image zoom which you have mentioned.

• (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView {
  return imgZoom;
  }

I have got value of imageview which I have set in the view did load.

I think you have done some thing wrong.

If you can share more then I can tell you in details.

Thanks