Download Error, how to extract info

Hi David, here's an example of using files.download with every error case handled in Swift: (apologies for the poor formatting on the forum)

Dropbox.authorizedClient!.files.download(path: path, destination: destination).response { response, error in
 if let (metadata, url) = response {
 print("*** Download file ***")
 print("Downloaded file name: \(metadata.name)")
 print("Downloaded file url: \(url)")
 } else if let callError = error {
 switch callError as CallError {
 case .RouteError(let boxed, let requestId):
 print("RouteError[\(requestId)]:")
 switch boxed.unboxed as Files.DownloadError {
 case .Path(let fileLookupError):
 print("PathError: ")
 switch fileLookupError {
 case .MalformedPath(let malformedPathError):
 print("MalformedPath: \(malformedPathError)")
 case .NotFile:
 print("NotFile")
 case .NotFolder:
 print("NotFolder")
 case .NotFound:
 print("NotFound")
 case .RestrictedContent:
 print("RestrictedContent")
 case .Other:
 print("Other")
 }
 case .Other:
 print("Other")
 }
 case .BadInputError(let message, let requestId):
 print("BadInputError[\(requestId)]: \(message)")
 case .HTTPError(let code, let message, let requestId):
 print("HTTPError[\(requestId)]: \(code): \(message)")
 case .InternalServerError(let code, let message, let requestId):
 print("InternalServerError[\(requestId)]: \(code): \(message)")
 case .OSError(let err):
 print("OSError: \(err)")
 case .RateLimitError:
 print("RateLimitError")
 }

 }
}

If I understand your question correctly, you can do the specific error detection in your Swift code, and then send whatever indicator or information you want back to the Objective-C side, as opposed to the error object or description itself.