问使用Chatto库ios更新聊天气泡中的图像

EN

var imgMess = DemoPhotoMessageModel(messageModel: messageModel, imageSize: placeholder.size, image: placeholder)
self.slidingWindow.insertItem(imgMess, position: .bottom)
self.delegate?.chatDataSourceDidUpdate(self)


ImageDownloader.default.downloadImage(with: downloadURL, options: [], progressBlock: nil) {[unowned self]
                            (image, error, url, data) in
                            print("Downloaded Image: \(image)")

                            if let img = image, let imgData = UIImagePNGRepresentation(img){
imgMess.setImage(img: img) //I updated the default implementation changing the image from var to let constant


}
}