ios - 如何解析 swift 3 的 api？

Question

一直在研究解析。对于 JSON 可用的大量信息，似乎没有任何内容可以解释如何以明智的方式使用 swift 3 提取信息。

这就是目前的情况

func getBookDetails() {


    let scriptUrl = "https://www.googleapis.com/books/v1/volumes?q=isbn:9781451648546" .

    let myurl = URL(string:scriptUrl)
    let request = NSMutableURLRequest(url: myurl!)
    request.httpMethod = "GET"

    let task = URLSession.shared.dataTask(with: myurl! ) { (data, response, error) in
        if error != nil{
        print("THIS ERROR",error!)
            return
        } else{
            if let mydata = data{
        do{
            let myJson = try (JSONSerialization.jsonObject(with: mydata, options: JSONSerialization.ReadingOptions.mutableContainers)) as AnyObject

           //   print("this is the MY  JSON",myJson) ---> prints out the json 


            if let dictonary = myJson["items"] as AnyObject? {
            print("the DICTONARY",dictonary) // ----> OUTPUT
                if let dictonaryAA = dictonary["accessInfo"] as AnyObject? {
                    print("the accessInfo",dictonaryAA)
                }

            }


        } catch{
            print("this is the in CATCH")
                }
            }      //data
        }
    }
    task.resume()
 }
 }



  OUTPUT :


      the DICTONARY (
    {
    accessInfo =         {
        accessViewStatus = SAMPLE;
        country = US;
      =============
   RELEVANT DATA as in https://www.googleapis.com/books/v1/volumes?
  q=isbn:9781451648546" 
   ==========================
        title = "Steve Jobs";
    };
}
)

只需要通过json数据解析得到引用isbn的书名，作者，书名。知道应该有更好的方法来做新语言的人容易理解的事情

Answer 1

可以通过两种方式解析api

使用 URLSession:

    let rawDataStr: NSString = "data={\"mobile\":\"9420....6\",\"password\":\"56147180..1\",\"page_no\":\"1\"}"
        self.parsePostAPIWithParam(apiName: "get_posts", paramStr: rawDataStr){  ResDictionary in
//            let statusVal = ResDictionary["status"] as? String
            self.postsDict = (ResDictionary["posts"] as! NSArray!) as! [Any]
            print("\n posts count:",self.postsDict.count)
        }


    func parsePostAPIWithParam(apiName:NSString, paramStr:NSString,callback: @escaping ((NSDictionary) -> ())) {
        var convertedJsonDictResponse:NSDictionary!
        let dataStr: NSString = paramStr
        let postData = NSMutableData(data: dataStr.data(using: String.Encoding.utf8.rawValue)!)
        let request = NSMutableURLRequest(url: NSURL(string: "http://13.12..205.248/get_posts/")! as URL,
                                          cachePolicy: .useProtocolCachePolicy,
                                          timeoutInterval: 10.0)
        request.httpMethod = "POST"
        request.allHTTPHeaderFields = nil
        request.httpBody = postData as Data
        let session = URLSession.shared
        let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
            if (error != nil) {
                print(error as Any)
            } else {
                let httpResponse = response as? HTTPURLResponse
                print(httpResponse as Any)
                do{
                    if let convertedJsonIntoDict = try JSONSerialization.jsonObject(with: data!, options: []) as? NSDictionary {
                        convertedJsonDictResponse = convertedJsonIntoDict.object(forKey: apiName) as? NSDictionary
                        // callback  for response
                        callback(convertedJsonDictResponse)
                    }
                } catch let error as NSError {
                    print(error)
                }
            }

使用 Alamofire

                func AlamofirePOSTRequest()  {
        let urlString = "http://13.12..205.../get_posts/"
        let para = ["data": "{\"mobile\":\"9420....6\",\"password\":\"56147180..1\",\"page_no\":\"1\"}"]

        Alamofire.request(urlString, method: .post, parameters: para , headers: nil).responseJSON {
            response in
            switch response.result {
            case .success:
                print("response: ",response)
                let swiftyJsonVar = JSON(response.result.value!)
                if let resData = swiftyJsonVar["posts"].arrayObject {
                    self.postsDict = resData as! [[String:AnyObject]]
                }
                print("\n \n alomafire swiftyJsonVar: ",swiftyJsonVar)
                break
            case .failure(let error):
                print(error)
            }
        }
    }
        })
        dataTask.resume()        
    }