如何使用 SwiftyJSON 从我的 JSON 中获取选定的元素并将其打印在控制台上？

Question

我有一个网络服务 returns 数据以选定的形式：

[{"_id":"56c861d0bcb42e075f7d47bd",
"username":"Shaylee Thompson",
"photo":"photo.jpg",
"number":"one",
"description":"Aut officia et ipsam. Dolorem pariatur molestiae sed saepe voluptatem voluptatem. Non maiores doloribus quis eum reprehenderit fugit vitae.",
"__v":0,
"updated_at":"2016-02-20T12:53:36.931Z",
"created_at":"2016-02-20T12:53:36.922Z",
"location":{
    "type":"Point",
    "coordinates":[-3.2880974020993934,49.8319259687921]}
},
{"_id":"55a9253297b21080ac8",
"username":"Eve Notter",
"photo":"photo.jpg",
"number":"two",
"description":"Aut officia et ipsam. Dolorem pariatur molestiae sed saepe voluptatem voluptatem. Non maiores doloribus quis eum reprehenderit fugit vitae.",
"__v":0,
"updated_at":"2016-02-20T12:53:36.931Z",
"created_at":"2016-02-20T12:53:36.922Z",
"location":{
    "type":"Point",
    "coordinates":[-2.212142,41.14321231]}
},
etc.

我想在我的控制台中显示上面每条记录的 location、username 和 description。

我创建了一个名为 RestManager.swift 的 class，其中包含两个方法：

static let sharedInstance = RestApiManager()

func getRandomUser(onCompletion: (JSON) -> Void) {
    let route = baseURL
    makeHTTPGetRequest(route, onCompletion: { json, err in
        onCompletion(json as JSON)
    })
}

func makeHTTPGetRequest(path: String, onCompletion: ServiceResponse) {
    let request = NSMutableURLRequest(URL: NSURL(string: path)!)

    let session = NSURLSession.sharedSession()

    let task = session.dataTaskWithRequest(request, completionHandler: {data, response, error -> Void in
        let json:JSON = JSON(data: data!)
        onCompletion(json, error)
        // if I put print(json) then I see the whole json in console
    })
    task.resume()
}

然后在不同的 class 我写道：

override func viewDidLoad() {
    getDummyData()  
}

func getDummyData() {
    RestApiManager.sharedInstance.getRandomUser { json in
        let results = json["username"]
        for (index: String, subJson: JSON) in results {
            let user: AnyObject = JSON["username"].object
            dispatch_async(dispatch_get_main_queue(),{
                print(user) //does not print anything so far
            })
        }
    }
}

所以我的问题是 - 我应该如何修改我的 getDummyData 方法以便我可以在控制台中看到我的 JSON 元素？

Answer 1

func getDummyData() {

   RestApiManager.sharedInstance.getRandomUser { json in

        for (index: String, subJson: JSON) in json  {
            let user: AnyObject = subjson["username"].object
            dispatch_async(dispatch_get_main_queue(),{
                print(user) 
            })
        }
    }
}

如何使用 SwiftyJSON 从我的 JSON 中获取选定的元素并将其打印在控制台上？

How can I get selected elements from my JSON using SwiftyJSON and print it on the console?

json

ios

swift

swifty-json