如何使用Swift将自定义字体添加到iOS中的imglyKit SDK中？

let sampleImage = image.image

    let configuration = Configuration() { builder in
        FontImporter.init().importFonts()

        builder.configurePhotoEditorViewController({ (editPhotoOption) in

            editPhotoOption.allowedPhotoEditorActions = [.text]

            editPhotoOption.actionButtonConfigurationClosure = {cell,_ in

                cell.captionLabel.text = "Add Text"
                //cell.backgroundColor = UIColor.red
            }
            editPhotoOption.backgroundColor = UIColor.brown
            editPhotoOption.allowsPreviewImageZoom = false            
        })

        builder.configureToolStackController({ (toolStackOption) in

            toolStackOption.mainToolbarBackgroundColor = UIColor.red
            toolStackOption.secondaryToolbarBackgroundColor = UIColor.brown

        })

        builder.configureTextFontToolController({ (textFontToolOption) in

            var fontArray = [String]()
            fontArray = ["AlexBrush_Regular.ttf","Arabella.ttf"]
            textFontToolOption.accessibilityElements = fontArray

            textFontToolOption.actionButtonConfigurationClosure = { cell,_ in
                cell.backgroundColor = UIColor.red
            }                
        })


        builder.configureTextToolController({ (textToolOption) in

            textToolOption.textViewConfigurationClosure = { label in

                label.textAlignment = NSTextAlignment.center
            }
        })
    }

    let photoEditViewController = PhotoEditViewController(photo: sampleImage!,configuration: configuration)



    let toolStackController = ToolStackController(photoEditViewController: photoEditViewController)
    toolStackController.delegate = self
    toolStackController.navigationController?.view.backgroundColor = UIColor.red
    present(toolStackController,animated: true,completion: nil)

请帮我添加自定义字体

我也使用FontImporter类来加载自定义字体,如http://static.photoeditorsdk.com/docs/ios/Classes/FontImporter.html所示
谢谢…