ios - NSJSONSerialization.JSONObjectWithData 改变返回结果的内容？

Question

func retrieveData(englishWord : String, completionHandler : (success: Bool, data : [String : AnyObject]?, errorString : String?) -> Void) {
        let baseURL = "https://api.pearson.com/v2/dictionaries/ldoce5/entries?headword=vodka"
        let urlString = baseURL
        print(urlString)
        let url = NSURL(string: urlString)
        let request = NSMutableURLRequest(URL: url!)
        let session = NSURLSession.sharedSession()
        let task = session.dataTaskWithRequest(request) { data, response, error in
            if error != nil {
                completionHandler(success: false, data: nil, errorString: "There was a networking error")
                return
            }
            if data == nil {
                completionHandler(success: false, data: nil, errorString: "There was an error in the request for data")
                return
            }

            let parsedResult : AnyObject?
            do {
                parsedResult = try NSJSONSerialization.JSONObjectWithData(data!, options: .AllowFragments) as! [String : AnyObject]
                print(parsedResult!)

            } catch {
                completionHandler(success: false, data: nil, errorString: "There was an error in the conversion for data")
                return
            }

        }
        task.resume()
    }

现在 print(parsedResult!) 给出:

{ count = 1; limit = 10; offset = 0; results = ( { datasets = ( ldoce5, dictionary ); headword = vodka; id = cqAG3cXCxZ; "part_of_speech" = noun; pronunciations = ( { audio = ( { lang = "British English"; type = pronunciation; url = "/v2/dictionaries/assets/ldoce/gb_pron/vodka0205.mp3"; } ); ipa = "\U02c8v\U0252dk\U0259"; }, { audio = ( { lang = "American English"; type = pronunciation; url = "/v2/dictionaries/assets/ldoce/us_pron/vodka.mp3"; } ); ipa = "\U02c8v\U0251\U02d0dk\U0259"; lang = "American English"; } ); senses = ( { definition = ( "a strong clear alcoholic drink originally from Russia, or a glass of this" ); } ); url = "/v2/dictionaries/entries/cqAG3cXCxZ"; } ); status = 200; total = 1; url = "/v2/dictionaries/ldoce5/entries?headword=vodka"; }

但是查询URL:Here

为了方便起见，我将其发布在这里:

{"status":200,"offset":0,"limit":10,"count":1,"total":1,"url":"/v2/dictionaries/ldoce5/entries?headword=vodka","results":[{"datasets":["ldoce5","dictionary"],"headword":"vodka","id":"cqAG3cXCxZ","part_of_speech":"noun","pronunciations":[{"audio":[{"lang":"British English","type":"pronunciation","url":"/v2/dictionaries/assets/ldoce/gb_pron/vodka0205.mp3"}],"ipa":"ˈvɒdkə"},{"audio":[{"lang":"American English","type":"pronunciation","url":"/v2/dictionaries/assets/ldoce/us_pron/vodka.mp3"}],"ipa":"ˈvɑːdkə","lang":"American English"}],"senses":[{"definition":["a strong clear alcoholic drink originally from Russia, or a glass of this"]}],"url":"/v2/dictionaries/entries/cqAG3cXCxZ"}]}

NSJSONSerialization 更改我的数据是否有原因，因为打印出的数据与 Pearson API 返回的数据明显不同？

Answer 1

我不相信它实际上改变了值(value)观，我相信你只是在看一种不同的表现形式。 (如果 Swift 的行为类似于 Objective-C)，print(x) 将调用 x 上的“描述”方法，它可以以任何它喜欢的格式输出对象。

您可能想要做的是使用以下方法重新编码数据:dataWithJSONObject:options:error(与您所做的基本上相反的调用)，并查看表示是什么。

https://developer.apple.com/library/ios/documentation/Foundation/Reference/NSJSONSerialization_Class/#//apple_ref/occ/clm/NSJSONSerialization/dataWithJSONObject:options:error :