def save_to_photo_library(jpeg_data, &block)
    photo_library.performChanges(-> {
      image = UIImage.imageWithData(jpeg_data)
      PHAssetChangeRequest.creationRequestForAssetFromImage(image)
    }, completionHandler: -> (success, error) {
      if error
        error_callback.call(error)
      else
        block.call(nil) # asset url is not returned in completion block
      end
    })
  end
def save_to_photo_library(jpeg_data, &block)
    photo_library.performChanges(-> {
      image = UIImage.imageWithData(jpeg_data)
      PHAssetChangeRequest.creationRequestForAssetFromImage(image)
    }, completionHandler: -> (success, error) {
      if error
        error_callback.call(error)
      else
        block.call(nil) 
      end
    })
  end
def save_to_photo_library ( jpeg_data , & block ) photo_library . performChanges ( -> { image = UIImage . imageWithData ( jpeg_data ) PHAssetChangeRequest . creationRequestForAssetFromImage ( image ) } , completionHandler : -> ( success , error ) { if error error_callback . call ( error ) else block . call ( nil ) # asset url is not returned in completion block end } ) end
iOS 8+
iOS 8 +