调用闪烁搜索时出现额外参数错误

Question

我使用了这段代码，最终我遇到了这个错误。请看一下我的代码：

var JSONError : NSError?
      let resultsDictionary = NSJSONSerialization.JSONObjectWithData(data, options:NSJSONReadingOptions(0), error: &JSONError) as? NSDictionary
      if JSONError != nil {
        completion(results: nil, error: JSONError)
        return
      }
switch (resultsDictionary!["stat"] as! String) {
  case "ok":
    print("Results processed OK")
  case "fail":
    let APIError = NSError(domain: "FlickrSearch", code: 0, userInfo: [NSLocalizedFailureReasonErrorKey:resultsDictionary!["message"]!])
    completion(results: nil, error: APIError)
    return
  default:
    let APIError = NSError(domain: "FlickrSearch", code: 0, userInfo: [NSLocalizedFailureReasonErrorKey:"Uknown API response"])
    completion(results: nil, error: APIError)
    return
  }

  let photosContainer = resultsDictionary!["photos"] as! NSDictionary
  let photosReceived = photosContainer["photo"] as! [NSDictionary]

  let flickrPhotos : [FlickrPhoto] = photosReceived.map {
    photoDictionary in

    let photoID = photoDictionary["id"] as? String ?? ""
    let farm = photoDictionary["farm"] as? Int ?? 0
    let server = photoDictionary["server"] as? String ?? ""
    let secret = photoDictionary["secret"] as? String ?? ""

    let flickrPhoto = FlickrPhoto(photoID: photoID, farm: farm, server: server, secret: secret)

    let imageData = NSData(contentsOfURL: flickrPhoto.flickrImageURL())
    flickrPhoto.thumbnail = UIImage(data: imageData!)

    return flickrPhoto
  }

  dispatch_async(dispatch_get_main_queue(), {
    completion(results:FlickrSearchResults(searchTerm: searchTerm, searchResults: flickrPhotos), error: nil)
  })
}
}