从不同的链接加载JSON，具体取决于应用程序中的内容

Question

我尝试做的是根据我的应用中发生的事情，从不同的链接（4个不同的链接）加载我的JSON。它是一个拥有4个不同电台的无线电网络应用程序。我可以将当​​前正在播放的电台推送到我的JSON ViewController，但问题是我如何让JSON做一个＆＃34;如果这个当前电台正在播放那么来自这个链接：链接到JSON信息＆＃34;？我知道它可能但不知道如何实现它。这是我使用交换机更新的JSON ViewController的代码，但没有运气：

class TableViewController: UITableViewController {
//1. Create An Array To Store The SongData
var songs = [SongData]()
var currentStation: RadioStation!
var downloadTask: URLSessionDownloadTask?

override func viewDidLoad() { super.viewDidLoad()


    self.tableView.delegate = self
    self.tableView.dataSource = self

    //2. Load The JSON From The Main Bundle

    struct RadioStation {

        var name: String
        var streamURL: String
        var imageURL: String
        var desc: String
        var longDesc: String

        let currentStation = RadioStation!(name: String)
    var reqStr = ""
    switch currentStation {
    case "SPIN":
        reqStr = "http://streamdb3web.securenetsystems.net/player_status_update/JACKSON1_history.txt"
    case "The FUZE":
        reqStr = "http://streamdb3web.securenetsystems.net/player_status_update/JACKSON2_history.txt"
    case "The RANCH":
        reqStr = "http://streamdb3web.securenetsystems.net/player_status_update/JACKSON3_history.txt"
    case "SAGE":
        reqStr = "http://streamdb3web.securenetsystems.net/player_status_update/JACKSON4_history.txt"
    default:
        reqStr = "http://streamdb3web.securenetsystems.net/player_status_update/JACKSON1_history.txt"

  let urlText = URL (string: reqStr)

    do{
        //a. Get The Data From The From The File
        let data = try Data(contentsOf: urlText!)

        //b. Decode The Data To Our Structs
        let albumData = try JSONDecoder().decode(Response.self, from: data)

        //c. Append The Songs Array With The PlayHistory
        albumData.playHistory.song.forEach { songs.append($0) }

        //d. Test Some Data
        print("""
            **The First Album Details**
            Album = \(songs[0].album)
            Artist = \(songs[0].artist)
            Cover = \(songs[0].cover)
            Duration = \(songs[0].duration)
            Start = \(songs[0].programStartTS)
            Title = \(songs[0].title)
            """)

        //3. Load The Data
        DispatchQueue.main.async {
            self.tableView.reloadData()
        }
    }catch{

        print(error)
    }
        }
    }
}`

以下代码是我用上面的开关更新之前的原始代码。

    'class TableViewController: UITableViewController {

        //1. Create An Array To Store The SongData
        var songs = [SongData]()
        var currentStation: RadioStation!
        var downloadTask: URLSessionDownloadTask?

        override func viewDidLoad() { super.viewDidLoad()


            self.tableView.delegate = self
            self.tableView.dataSource = self

            //2. Load The JSON From The Main Bundle

            guard let urlText = URL (string: "http://streamdb3web.securenetsystems.net/player_status_update/JACKSON1_history.txt")
                else { return }


            do{
                //a. Get The Data From The From The File
                let data = try Data(contentsOf: urlText)

                //b. Decode The Data To Our Structs
                let albumData = try JSONDecoder().decode(Response.self, from: data)

                //c. Append The Songs Array With The PlayHistory
                albumData.playHistory.song.forEach { songs.append($0) }

                //d. Test Some Data
                print("""
                    **The First Album Details**
                    Album = \(songs[0].album)
                    Artist = \(songs[0].artist)
                    Cover = \(songs[0].cover)
                    Duration = \(songs[0].duration)
                    Start = \(songs[0].programStartTS)
                    Title = \(songs[0].title)
                    """)

                //3. Load The Data
                DispatchQueue.main.async {
                    self.tableView.reloadData()
                }
            }catch{

                print(error)
            }

        }