致命錯誤：意外地發現零而展開的可選值，而對象的接收的子陣列

Question

class Matchess { 
    var matchBack : MatchBack? 
    var matchTeam1 : MatchTeam1? 
    var matchTeam2 : MatchTeam2? 
    var matchLeague :MatchLeague? 
    var matchRound :MatchRound? 
    var matchTime :MatchTime? 
    var matchDay: MatchDay? 
    var matchStatus :MatchStatus? 
    var matchCountDown :MatchCountDown? 
    var matchIconTeam1 : MatchIconTeam1? 
    var matchIconTeam2 : MatchIconTeam2? 
    var matchCountDownDateTime :MatchCountDownDateTime? 
    var matchId : MatchId? 
    var matchImage : MatchImage? 
    var matchScore :MatchScore? 
    var nextMapId :NextMapId? 
    var matchTimePlayed : MatchTimePlayed? 
    var matchPenalty :MatchPenalty? 
    init(json:[String:Any]) 
    { 
     matchBack = MatchBack.init(json: json["match_back"] as! Dictionary<String,Any>) 
     matchTeam1 = MatchTeam1.init(json: json["match_teamI"]as! Dictionary<String,Any>) 
     matchTeam2 = MatchTeam2.init(json: json["match_teamII"]as! Dictionary<String,Any>) 
     matchLeague = MatchLeague.init(json: json["match_league"]as!Dictionary<String,Any>) 
     matchRound = MatchRound.init(json: json["match_round"]as! Dictionary<String,Any>) 
     matchTime = MatchTime.init(json: json["match_time"]as! Dictionary<String,Any>) 
     matchDay = MatchDay.init(json: json["match_day"]as! Dictionary<String,Any>) 
     matchStatus = MatchStatus.init(json: json["match_status"]as! Dictionary<String,Any>) 
     matchCountDown = MatchCountDown.init(json: json["match_count_down"]as! Dictionary<String,Any>) 
     matchIconTeam1 = MatchIconTeam1.init(json: json["match_icon_teamI"]as! Dictionary<String,Any>) 
     matchIconTeam2 = MatchIconTeam2.init(json: json["match_icon_teamII"]as! Dictionary<String,Any>) 
     matchCountDownDateTime = MatchCountDownDateTime.init(json: json["match_count_down_date_time"]as! Dictionary<String,Any>) 
     matchId = MatchId.init(json: json["Value"]as! Dictionary<String,Any>) 
     matchImage = MatchImage.init(json: json["match_image"]as! Dictionary<String,Any>) 
     matchScore = MatchScore.init(json: json["match_score"]as! Dictionary<String,Any>) 
     nextMapId = NextMapId.init(json: json["next_map_id"]as! Dictionary<String,Any>) 
     matchTimePlayed = MatchTimePlayed.init(json: json["match_time_played"]as! Dictionary<String,Any>) 
     matchPenalty = MatchPenalty.init(json: json["match_penalty"]as! Dictionary<String,Any>) 

    } 
    init(json:AnyObject) 
    { 
     matchBack = MatchBack.init(json: json["match_back"] as! Dictionary<String,Any>) 
     matchTeam1 = MatchTeam1.init(json: json["match_teamI"]as! Dictionary<String,Any>) 
     matchTeam2 = MatchTeam2.init(json: json["match_teamII"]as! Dictionary<String,Any>) 
     matchLeague = MatchLeague.init(json: json["match_league"]as!Dictionary<String,Any>) 
     matchRound = MatchRound.init(json: json["match_round"]as! Dictionary<String,Any>) 
     matchTime = MatchTime.init(json: json["match_time"]as! Dictionary<String,Any>) 
     matchDay = MatchDay.init(json: json["match_day"]as! Dictionary<String,Any>) 
     matchStatus = MatchStatus.init(json: json["match_status"]as! Dictionary<String,Any>) 
     matchCountDown = MatchCountDown.init(json: json["match_count_down"]as! Dictionary<String,Any>) 
     matchIconTeam1 = MatchIconTeam1.init(json: json["match_icon_teamI"]as! Dictionary<String,Any>) 
     matchIconTeam2 = MatchIconTeam2.init(json: json["match_icon_teamII"]as! Dictionary<String,Any>) 
     matchCountDownDateTime = MatchCountDownDateTime.init(json: json["match_count_down_date_time"]as! Dictionary<String,Any>) 
     matchId = MatchId.init(json: json["Value"]as! Dictionary<String,Any>) 
     matchImage = MatchImage.init(json: json["match_image"]as! Dictionary<String,Any>) 
     matchScore = MatchScore.init(json: json["match_score"]as! Dictionary<String,Any>) 
     nextMapId = NextMapId.init(json: json["next_map_id"]as! Dictionary<String,Any>) 
     matchTimePlayed = MatchTimePlayed.init(json: json["match_time_played"]as! Dictionary<String,Any>) 
     matchPenalty = MatchPenalty.init(json: json["match_penalty"]as! Dictionary<String,Any>) 

    } 

} 

這是從服務器檢索的對象的陣列，每一個對象具有一類，例如：

class MatchTeam1 { 
    var teamId : String? 
    var text : String? 
    var mapId : String? 
    var textColor: String? 
    var extId : String? 
    init(json:AnyObject) 
    { 
     teamId = json["Id"] as? String 
     text = json["Text"] as? String 
     mapId = json["MapId"] as? String 
     textColor = json["TextColor"] as? String 
     extId = json["ExtId"] as? String 

    } 
    init(json:[String:Any]) 
    { 
    teamId = json["Id"] as? String 
    text = json["Text"] as? String 
    mapId = json["MapId"] as? String 
    textColor = json["TextColor"] as? String 
    extId = json["ExtId"] as? String 

    } 
} 

在主視圖控制器中，我得到了整個兒子文件，即使我可以得到該區域，但是當試圖訪問該數組的對象時，應用程序崩潰並且出現以上錯誤： 主視圖控制器代碼：

if let urlt : NSURL = NSURL(string:url)! 
     { 
      print(urlt) 
     } 

     let request = NSMutableURLRequest(URL: NSURL(string:url)!) 
     let session = NSURLSession.sharedSession() 
     request.HTTPMethod = "POST" 
     //Note : Add the corresponding "Content-Type" and "Accept" header. In this example I had used the application/json. 
     request.addValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type") 

     request.addValue("application/json", forHTTPHeaderField: "Accept") 

request.HTTPBody = parameters.dataUsingEncoding(NSUTF8StringEncoding) 

     //request.HTTPBody = try! NSJSONSerialization.dataWithJSONObject(parameter, options: .PrettyPrinted) 

     let task = session.dataTaskWithRequest(request) { data, response, error in 
      guard data != nil else 
      { 
       print("no data found: \(error)") 
       return 
      } 

      do 
      { 
       print(data) 
       var jsonStr = NSString(data: data!, encoding: NSUTF8StringEncoding)// No error 
       //thrown, but not NSDictionary 





       if let json = try NSJSONSerialization.JSONObjectWithData(data!, options:.AllowFragments) as? NSMutableDictionary 

       { 
        print(son) // getting all son file data 






        let test = json["Matches"] 
        print(test)// prints the array of son objects 


    let test2 = Matchess.init(json: test!)//getting error here 
         //let test2 = Matchess.init(json:  json["Matches"]! as! Dictionary<String,Any>)// getting error 
test2. // can access all objects in array test , but cannot print them, since crashing. 
         print(test2)// crashing 





       } 

       else 
       { 
        let jsonStr = NSString(data: data!, encoding: NSUTF8StringEncoding)// No error thrown, but not NSDictionary 

        // print("Error could not parse JSON: \(jsonStr)") 

       } 

      } 
      catch let parseError as NSError 
      { 
       print(parseError.description)// Log the error thrown by `JSONObjectWithData` 
       let jsonStr = NSString(data: data!, encoding: NSUTF8StringEncoding) 
       print("Error could not parse JSON: '\(jsonStr)'") 
      } 
     } 

     task.resume() 

我在課堂上做了2個單元，僅僅因爲第一個單元沒有工作，所以我試圖改變第二個單元的公式，但也沒有工作。任何幫助

Answer 1

致命錯誤：意外發現零，同時展開一個可選值;

當分配的值爲無時發生此錯誤。您可以通過分配可選值來省略此錯誤。 嘗試調試您的代碼和打印值，以便確保沒有零值。

可選值：？，展開值：，

的展開值會崩潰的應用程序，如果該值是零。