Question

This time I am facing problem while performing dual operation on UIImageView means

1) Zoom+Flip the Image 

2)Zoom + Reverse the Image 

3)Zoom + Flip or Reverse + Rotate(+- 90)deg

so please help to find out the solution of this problem. In thiscase for Zoom I use the GuestureRecognizer for fliping+Revesing+Rotating UIImageView I Use the the UIButton for these operation so how I can handle these operations wiith combination on UIImage

what exact the problem When I Zoom In or Zoom Out the image the at the same time I want to rotate (+-90 deg) or Flip or Reverse the Image at exact zoom In or Zoom Out Position but that time Image get reset then perform the respective operation such rotate, flip ,reverse I wanted to do it simultaneously on UIImage

my code as

if (btnNames == "Rotate R") 
 {
 Angle = deg + 90;
 imgview.Transform = CGAffineTransform.MakeRotation (Angle * (float)Math.PI / 180); 
 return Angle;
 } else
 { 
 Angle = deg - 90; 
 imgview.Transform = CGAffineTransform.MakeRotation (Angle * (float)Math.PI / 180); 
  return Angle; 

}

For Reverse

CGAffineTransform transform = CGAffineTransform.MakeScale (-1, 1); 
imgView.Transform = transform;
return  true; 

============
For Flip

if (flips == false) 
 { 
CGAffineTransform transform = CGAffineTransform.MakeScale (1, -1); 
 imgView.Transform = transform; 
return  true; 
 }

this code i implemented it works fine individually perform to operation. But I want to work simultaneously on UIImage

Answer 1

I would recommend:

• Place the UIImage in a UIScrollView with zooming setup
• Modify your UIImage‘s Transform for reverse, rotate, etc.

To setup zooming:

yourScroller.MaximumZoomScale = 5;
yourScroller.MinimumZoomScale = 1;
yourScroller.ViewForZoomingInScrollView = _ => yourImage;

An example for rotation would be:

yourImage.Transform.Rotate (Math.PI / 2)

Play around with it, the UIScrollView should modify the same Transform on the image, so everything should work in tandem.