class ViewController: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate {

    func handleProfileImage() {
        ...
        imagePickerController.mediaTypes = [kUTTypeImage as String]
        imagePickerController.delegate = self
        present(imagePickerController, animated: true, completion: nil)
    }

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
        print("Finish picking image", info)
    }
}