let imageToBeFiltered = UIImage(named: "targetImage")
let vc = SHViewController(image: imageToBeFiltered)
vc.delegate = self
self.present(vc, animated:true, completion: nil)

extension ViewController: SHViewControllerDelegate {
    func shViewControllerImageDidFilter(image: UIImage) {
      // Filtered image will be returned here.
    }

    func shViewControllerDidCancel() {
      // This will be called when you cancel filtering the image.
    }
}