使用Swift4 JSONDecoder解析IOS FBSDKGraphRequest结果

Question

the result of FBSDKGraphRequest is of type any and could be casting to NSDictionary , but how to convert it to Data object to be able to use this SWIFT4 feature

let jsonDecoder = JSONDecoder.init()
let fbModel = try? jsonDecoder.decode(FBModel.self, from: dataFromResult)

i'm try this but the result was nil as code comments

    FBSDKGraphRequest.init(graphPath: "me", parameters: ["fields":"email,name,id"]).start{ (connection, results, error) -> Void in
           let dataFromResult = NSKeyedArchiver.archivedData(withRootObject: results)
           let stringFromData = String.init(data: dataFromResult, encoding: String.Encoding.utf8)//return nil
           let jsonDecoder = JSONDecoder.init()
           let fbModel = try? jsonDecoder.decode(FBModel.self, from: dataFromResult)//fbModel nil
}

Answer 1

它为我工作，但我不确定这是否是最佳解决方案

let resDataFromDic = try? JSONSerialization.data(withJSONObject: resDict, options: JSONSerialization.WritingOptions.prettyPrinted)