Gold Challenge - How to find middle of image capture area?

The Gold challenge in chapter 15 says to place the crosshair in the middle of the image capture area - I presume this to mean the area with the actual camera image, excluding the controls at the top and bottom.

My solution, and the other solution under this topic, place the cross hair in the middle of the screen - not the “image capture area”.

Am I misinterpreting the meaning of “image capture area” or is there some way to get the dimensions/position of that area to properly centre the crosshair on the image being captured?

Also, I’d be interested to know if there’s a way to determine when the camera is in the “choose/retake” state after the user has clicked the shutter button - at that point the cross-hair should be disabled.

let x = imagePickerController.cameraOverlayView!.bounds.midX
let y = imagePickerController.cameraOverlayView!.bounds.midY
let middleOfTheCaptureArea = CGPoint(x: x, y: y)