在UIImagePickerController上移动和缩放

Question

我正在尝试允许用户使用移动和缩放视图编辑现有照片，并允许他们编辑他们选择或拍摄的任何照片，但我无法使移动和缩放视图正确显示。如何显示标题和圆圈视图？这就是现在的样子： 这就是我想要的：

  func addImage(sender: UIButton) {
        self.view.endEditing(true)
        let alert = UIAlertController(title: "", message: nil, preferredStyle: .actionSheet)

            var numberAlert = UIAlertAction(title: "Take Photo", style: UIAlertActionStyle.default, handler:  { action in
                self.takePhoto()
            })
            alert.addAction(numberAlert)

         numberAlert = UIAlertAction(title: "Choose Photo", style: UIAlertActionStyle.default, handler:  { action in
            self.choosePhoto()
        })
        alert.addAction(numberAlert)

         numberAlert = UIAlertAction(title: "Edit Photo", style: UIAlertActionStyle.default, handler:  { action in
            self.editPhoto()
        })
        alert.addAction(numberAlert)

         numberAlert = UIAlertAction(title: "Delete Photo", style: UIAlertActionStyle.default, handler:  { action in
            self.deletePhoto()
        })
        alert.addAction(numberAlert)


        let cancelAlert = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.default, handler:nil)
        cancelAlert.setValue(UIColor.blue, forKey: "titleTextColor")
        alert.addAction(cancelAlert)

        self.present(alert, animated: true, completion: nil)
    }


    func choosePhoto() {
        imagePicker = nil
        imagePicker =  UIImagePickerController()
        imagePicker.delegate = self
        imagePicker.allowsEditing = true
        imagePicker.sourceType = .photoLibrary
        present(imagePicker, animated: true, completion: nil)
    }


    func takePhoto() {
        imagePicker = nil
        imagePicker =  UIImagePickerController()
        imagePicker.resignFirstResponder()
        imagePicker.delegate = self
        imagePicker.allowsEditing = true
        imagePicker.sourceType = .camera
        present(imagePicker, animated: true, completion: nil)
    }

    func editPhoto() {

    }

    func deletePhoto() {

    }

    //MARK: - Saving Image here
    @IBAction func save(_ sender: AnyObject) {
        UIImageWriteToSavedPhotosAlbum(self.contact.image!, self, #selector(image(_:didFinishSavingWithError:contextInfo:)), nil)
    }

    //MARK: - Add image to Library
    func image(_ image: UIImage, didFinishSavingWithError error: Error?, contextInfo: UnsafeRawPointer) {
        if let error = error {
            NSLog("Error saving image: \(error)")
        } else {
           self.tableView.reloadRows(at: [IndexPath(row: 0, section: 0)], with: UITableViewRowAnimation.none)
        }
    }

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
        imagePicker.dismiss(animated: true, completion: nil)
        self.contact.image = info[UIImagePickerControllerOriginalImage] as? UIImage
        self.tableView.reloadRows(at: [IndexPath(row: 0, section: 0)], with: UITableViewRowAnimation.none)
    }