Swift: 获取 JSON 数据并在本地更新

Question

在我的项目中，我需要从网络上获取 JSON 数据。同时，我会将其转换为 String 并将其存储在我的 Core Data 中。

假设我从网络上获取这个 JSON 数据。

我只需要帮助从 JSON 获取数据并转换为 String Array。对不起，我是 Swift2 的新手，我只知道如何编码到这里。

var url: NSURL = NSURL(string: jsonUrl)!
var request: NSURLRequest = NSURLRequest(URL: url)
let queue:NSOperationQueue = NSOperationQueue()

Answer 1

let task = NSURLSession.sharedSession().dataTaskWithURL(NSURL(string: "url")!, completionHandler: { (data, response, error) -> Void in
    if error != nil {
        //do something with error
        return
    }

    do {
        if let data = data, jsonData = try NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.AllowFragments) as? [[String:AnyObject]] {

            for object in jsonData {
                var object = Object()
                if let platform = object["platform"] as? String {
                    object.platform = platform
                }
            }
        }
    } catch {
        //Handle error
    }
})
task.resume()

Answer 2

给你，在我的机器上用本地网络服务测试

let session = NSURLSession.sharedSession()
        let request = NSMutableURLRequest(URL: NSURL(string: "http://localhost:8080/iOSServer/ios/helloworld/getJSONArray")!)
        request.HTTPMethod = "GET" // change it to post if you want

        let task = session.dataTaskWithRequest(request, completionHandler: {(data, response, error) in

            if let error = error {
                print(error)
            }
            if let data = data{
                do{
                    let resultJSON = try NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions())
                    let resultArray = resultJSON as? NSArray
                    for jsonObjectString in resultArray!{
                        let platform = jsonObjectString["platform"]!
                        let favorite = jsonObjectString["favorite"]!
                        let language = jsonObjectString["language"]!
                        print("platform = \(platform!)")
                        print("favorite = \(favorite!)")
                        print("language = \(language!)")
                    }

                }catch _{
                    print("Received not-well-formatted JSON")
                }

            }
            if let response = response {
                let httpResponse = response as! NSHTTPURLResponse
                print("response code = \(httpResponse.statusCode)")
            }



        })
        task.resume()
    }

如你所见，在 for 循环中，我正在打印来自服务器的值，你可以用它们做任何你想做的事。

我假设 JSON 键是：platform、favorite 和 language 你可以改变它们。 (请注意大小写字母)

Swift: 获取 JSON 数据并在本地更新

Swift: Fetch JSON data and update locally

json

nsjsonserialization

nsurlsession

swift

swift2