Rect that I am sending is within bounds (as you can see in the error messages)

Not really, 701 + 92 > 768 so it is out of bounds according to the logs. CGRectContainsRect will return false and so throw the exception.

If the controller.view.frame coordinates are correct or not, it's another question.

See:

@miquelbeltran I was assuming the coordinates from the error log were the corners of the Rect.

Any suggestion for a better way to get a valid sharePositionOrigin? I'd prefer not to give a static Rect in the middle of the screen but a Rect close to the widget that was clicked.

I'd prefer not to give a static Rect in the middle of the screen but a Rect close to the widget that was clicked.

I think wrapping the target widget with a builder and obtaining the coordinates from the inmediate render object, just like the example project.

I think wrapping the target widget with a builder and obtaining the coordinates from the inmediate render object, just like the example project.

This is what I am currently doing (wrapping with a Builder) but I get the crash reports so it seems this approach does not work in all cases.

1024 x 768 (which was is reported as the controller.view in the iOS obj-c code) look like iPad mini & 2nd Gen iPads. Can you try your app on a simulator for those smaller devices?

edit: Do you have the device model from the error report? Also iPads can split-screen if I remember correctly. I'd try playing with that see if a specific resolution breaks the share functionality.

@miquelbeltran I have managed to reproduce this by placing the share button in a scroll view at the edge of the screen.

I've updated the code that computes the sharePositionOrigin to fall back to a rectangle in the middle of the screen if the computed rectangle does not fit the available screen.

Rect sharePositionOrigin(BuildContext context) {
  final RenderBox? box = context.findRenderObject() as RenderBox?;
  final Rect candidatePositionOrigin =
      (box!.localToGlobal(Offset.zero) & box.size);
  final double width = MediaQuery.sizeOf(context).width;
  final double height = MediaQuery.sizeOf(context).height;
  if (candidatePositionOrigin.left >= 0 &&
      candidatePositionOrigin.right < width &&
      candidatePositionOrigin.top >= 0 &&
      candidatePositionOrigin.bottom < height) {
    return candidatePositionOrigin;
  } else {
    return Rect.fromCenter(
      center: Offset(width / 2, height / 2),
      width: 100,
      height: 100,
    );
  }
}