如何打印軌道數據（swift）

Question

所以我有以下代碼打印出以下內容

[DRN1.Data(track: DRN1.Trackinfo(title: "Charly\'s Ballad (Original Mix)", artist: "Castle Queenside", imageurl: "covers.drn1.com.au/az_B1017197_Disc 1 Traxsource Nu Disco & Indie Dance_Castle Queenside.jpg"))]

然而當我去寫

print(nowplaying.data.track.title)

我收到錯誤，它甚至不會嘗試加載 swift 應用程序

struct Nowplayng: Decodable{
    let data: [Data]
}

struct Data: Decodable{
    let track: Trackinfo
}
struct Trackinfo: Decodable {
    let title: String
    let artist: String
    let imageurl: String
}

作品

override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.

        let jsonURLString = "https://api.drn1.com.au/station/playing"
        guard let feedurl = URL(string: jsonURLString) else { return }

        URLSession.shared.dataTask(with: feedurl) { (data,response,err)
            in

            guard let data = data else { return }

            do{
                let nowplaying = try JSONDecoder().decode(Nowplayng.self, from: data)
                    print(nowplaying.data)


            }catch let jsonErr{
            print("error json ", jsonErr)
            }

//            let dataAsString = String(data:data, encoding: .utf8)
//            print(dataAsString)
        }.resume()



    }

不起作用

override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.

        let jsonURLString = "https://api.drn1.com.au/station/playing"
        guard let feedurl = URL(string: jsonURLString) else { return }

        URLSession.shared.dataTask(with: feedurl) { (data,response,err)
            in

            guard let data = data else { return }

            do{
                let nowplaying = try JSONDecoder().decode(Nowplayng.self, from: data)
                    print(nowplaying.data.track.title)


            }catch let jsonErr{
            print("error json ", jsonErr)
            }

//            let dataAsString = String(data:data, encoding: .utf8)
//            print(dataAsString)
        }.resume()



    }

Answer 1

data是一個需要循環遍歷的數組

nowplaying.data.forEach {
   print($0.track.title)
} 

---

如果您關心第一項，請執行

if let item = nowplaying.data.first {
   print(item.track.title)
}