Преобразование JSON NSData в словарь

Question

У меня есть такой JSON-файл.

{ 
"Team Name" : "Team", 
"Images" : "images", 
"Players" : [ 
    { 
     "Number" : "61", 
     "Height" : "6'5\"", 
     "Position" : "P", 
     "DOB" : "Feb 22, 1989", 
     "First Name" : "Chris", 
     "Weight" : "210", 
     "Last Name" : "Shmoe", 
     "Bats" : "R", 
     "Throws" : "R" 
    }, 
    { 
     "Number" : "54", 
     "Height" : "6'3\"", 
     "Position" : "P", 
     "DOB" : "Dec 31, 1982", 
     "First Name" : "Ronald", 
     "Weight" : "240", 
     "Last Name" : "Peter", 
     "Bats" : "R", 
     "Throws" : "R" 
    }, 
    { 
     "Number" : "67", 
     "Height" : "6'4\"", 
     "Position" : "P", 
     "DOB" : "Sep 24, 1984", 
     "First Name" : "Scott", 
     "Weight" : "215", 
     "Last Name" : "Tim", 
     "Bats" : "R", 
     "Throws" : "R" 
    }, 

Heres Что мне

var downloadFailed = false 
    var error: NSError? = nil 

    let navigationController = self.window!.rootViewController as! UINavigationController 
    let masterController = navigationController.childViewControllers[0] as! PlayerViewController 

    if let url = NSURL(string: " ") { 

     if let urlData = NSData(contentsOfURL: url) { 
      let jsonString = NSString(data: urlData, encoding: NSUTF8StringEncoding) 
      println(jsonString) 
      var result = NSJSONSerialization.JSONObjectWithData(urlData, options: NSJSONReadingOptions.allZeros, error: nil) as? NSDictionary 

      print("dictionary created") 
      if let players = result?.objectForKey("Players") as? [[String:AnyObject]] 
      { 

       for dictionary in players{ 

        let fname = players["First Name"] 
        let lname = array["Players"]?["Last Name": String] 
        let number = array["Players"]?["Number"] 
        let position = array["Players"]?["Position"] 
        let bats = array["Players"]?["Bats"]?!.string 
        let throws = array["Players"]?["Throws"]?!.string 
        let height = array["Players"]?["Height"]?!.string 
        let weight = array["Players"]?["Weight"]?!.string 
        let DOB = array["Players"]?["DOB"]?!.string 


        masterController.objects.append(Players(fName: (fname as String?)!, lname: (lname as String?)!, position: (position as String?)!, bats: (bats as String?)!, throws: (throws as String?)!, height: (height as String?)!, weight: (weight as String?)!, DOB: (DOB as String?)!, number: (number as String?)!))} 

В настоящее время единственное, что я думаю, что я не имею правильно, я не знаю, как сделать код для чтения в должным образом, чтобы он использует ключ «Игроки» и считывает правильную информацию из файла JSON.

EDIT:

Я работал на нем кучу и получил это сейчас у меня очень мало ошибок, просто не держит сбой в

if let dict = array as? [String: AnyObject] 

Но ЭРВО мой новый код для моей функции загрузки данных

func preloadData() { 


     var downloadFailed = false 
     var error: NSError? = nil 

     let navigationController = self.window!.rootViewController as! UINavigationController 
     let masterController = navigationController.childViewControllers[0] as! PlayerViewController 

     if let url = NSURL(string: "removed for reasons") { 

      if let urlData = NSData(contentsOfURL: url) { 

       if let array: AnyObject! = NSJSONSerialization.JSONObjectWithData(urlData, options: nil, error: &error) 
       { 
        print (array) 
        if let dict = array as? [String: AnyObject] 
        { 
        if let players = dict["Players"] as? [AnyObject] 
        { 
        for dictionary in players { 
        let fname = dictionary["First Name"] 
        let lname = dictionary["Last Name"] 
        let number = dictionary["Number"] 
        let position = dictionary["Position"] 
        let bats = dictionary["Bats"] 
        let throws = dictionary["Throws"] 
        let height = dictionary["Height"] 
        let weight = dictionary["Weight"] 
        let DOB = dictionary["DOB"] 


        masterController.objects.append(Players(fName: fname as! String, lname: lname as! String, position: position as! String, bats: bats as! String, throws: throws as! String, height: height as! String, weight: weight as! String, DOB: DOB as! String, number: number as! String)) 
         } 
         } 
       } 

       //masterController.objects.sort({$0.courseNumber < $1.courseNumber}) 
      } 
      else 
      { 
       downloadFailed = true 
      } 
     } else { 
      downloadFailed = true 
     } 
    } else { 
     downloadFailed = true 
    } 

    if downloadFailed { 
     let alert = UIAlertView(title: "Error", message: "Unable to download course data", delegate: nil, cancelButtonTitle: "OK") 
     alert.show() 
    } 
} 

Answer 1

Я понимаю, что вопрос с помощью Swift 2, но так как нет никаких ответов, и каждый должен использовать Swift 3, здесь решение Swift 3.

func preloadData(){ 

    func failed(msg: String){ 

     let alert = UIAlertController(title: "Error", message: msg, preferredStyle: .alert) 

     alert.addAction(UIAlertAction(title: "Ok", style: .default, handler: nil)) 

     self.addChildViewController(alert) 
    } 

    guard let navigationController = self.window!.rootViewController as? UINavigationController else { failed(msg: "The root view controller is not a UINavigationController"); return } 

    guard let masterController = navigationController.childViewControllers[0] as? PlayerViewController else { failed(msg: "There is no PlayerViewController"); return } 

    guard let url = URL(string: "Whatever your URL is") else { failed(msg: "This is an invalid URL"); return } 

    guard let contents = try? Data(contentsOf: url) else { failed(msg: "Cannot retrieve data from this URL"); return } 

    guard let json = try? JSONSerialization.jsonObject(with: contents, options: .mutableContainers) else { failed(msg: "Contents is not in JSON format."); return } 

    guard let dict = json as? Dictionary<String,Any> else { failed(msg: "Cannot convert JSON to dictionary."); return } 

    guard let players = dict["Players"] as? Array<Dictionary<String,String>> else { failed(msg: "There is no players."); return } 

    for player in players { 

     guard 
      let firstName = player["First Name"], 
      let lastName = player["Last Name"], 
      let position = player["Position"], 
      let bats  = player["Bats"], 
      let _throws  = player["Throws"], 
      let height  = player["Height"], 
      let weight  = player["Weight"], 
      let dob   = player["DOB"], 
      let number  = player["Number"] else { continue } 

     masterController.objects.append(Player(firstName: firstName, lastName: lastName, position: position, bats: bats, throws: _throws, height: height, weight: weight, dob: dob, number: number)) 

    } 
}