将NSSecureCoding转换为NSData - Xcode - Swift

Question

我有一些创建名为"content“的NSSecureCoding变量的代码，我希望将该变量转换为NSData，然后可以将其转换为UIImage或发送到本地服务器。我如何正确地转换它？我想在我的iOS应用程序中做一个分享扩展，这样当你在一张照片上按共享时，它就会获取照片内容并将其转换为NSData。下面是我的代码：

    inputItem = extensionContext!.inputItems.first as NSExtensionItem
    attachment = inputItem.attachments![0] as NSItemProvider
    if (attachment.hasItemConformingToTypeIdentifier(kUTTypeImage as String)){
        attachment.loadItemForTypeIdentifier(kUTTypeImage as String,
            options: nil,
            completionHandler: {(content, error: NSError!) in

                //insert code to convert "content"(NSSecureCoding) to NSData variable

        })
    }

Answer 1

DispatchQueue.global().async {

    attachment.loadItem(forTypeIdentifier: kUTTypeImage as String, options: nil, completionHandler: { (item, error) in
        if let error = error {
            print(error.localizedDescription)
            return
        }

        var image: UIImage?

        if item is UIImage {
            image = item as? UIImage
        }

        if item is URL {
            let data = try? Data(contentsOf: item as! URL)
            image = UIImage(data: data!)!
        }

        if item is Data {
            image = UIImage(data: item as! Data)!
        }

        if let image = image {
            DispatchQueue.main.async {
                // image here
            }
        }

    })
}

Answer 2

有点晚了，但这件事今天发生在我身上，我像这样解决了它，在completionHandler中

  if let data = content {
        self.imageData = UIImage(data: NSData(contentsOfURL: data as! NSURL)!)                      
  }

imageData为UIImage类型。