Control magnifying glass view from another view

MagnifyingSuperview.swift

class ViewController: UIViewController {
 
  //Set your views and long press recognizer to magnifyControlView
  
    private func handleMagnify(_ recognizer: UILongPressGestureRecognizer) {
        let point = recognizer.location(in: magnifyControlView).multiplyValues(by: controlScale)

        switch recognizer.state {
        case .began:
            magnifyView = MagnifyingView(viewToMagnify: comicPageImageView, size: CGSize(width: 200, height: 200))
            magnifyView.setTouchPoint(point)
            self.addSubview(magnifyView)
        case .changed:
            magnifyView.setTouchPoint(point)
        case .cancelled, .ended, .failed:
            magnifyView.removeFromSuperview()
            magnifyView = nil
        default: return
        }
    }
}