在IOS中解析嵌套的JSON代码

Question

我正在尝试在iOS中解析以下JSON代码。 JSON代码由一系列从0到x的游戏组成。 我一直在搜索，但似乎找不到任何具有这种格式的JSON的示例。

{
"command":"show_my_games",
"0":{"gameid":"7","foruserid":"16","againstuserid":"0","casefor":"","caseagainst":"","status":"0","argumentid":"7","againstusername":null,"forusername":"Gem","argument":"argument 1"},
"1":{"gameid":"8","foruserid":"15","againstuserid":"16","casefor":"","caseagainst":"","status":"0","argumentid":"23","againstusername":"Gem","forusername":"Nick","argument":"argument 2"},
"2":{"gameid":"9","foruserid":"18","againstuserid":"16","casefor":"","caseagainst":"","status":"0","argumentid":"26","againstusername":"Gem","forusername":"Nick","argument":"argument 3"}
}

我已经创建了一个游戏对象，并且想要为JSON数组中的每个项目创建一个新的游戏对象，并将其添加到游戏数组中。 我在解析JSON时遇到问题，非常感谢您的帮助或建议。

我正在尝试使用的代码是

            NSMutableDictionary *json = [NSJSONSerialization JSONObjectWithData:responseData options:kNilOptions error:&err];

            for (NSMutableDictionary * gameItem in json) {
                Game *obj = [Game new];
                obj.GameID=[gameItem objectForKey:@"gameid"];
                obj.Argument=[gameItem objectForKey:@"argument"];
                obj.CaseFor=[gameItem objectForKey:@"casefor"];
                obj.CaseAgainst=[gameItem objectForKey:@"caseagainst"];
                obj.CaseForOwner=[gameItem objectForKey:@"forusername"];
                obj.CaseAgainstOwner=[gameItem objectForKey:@"againstusername"];
                obj.CaseForOwnerID=[gameItem objectForKey:@"foruserid"];
                obj.CaseAgainstOwnerID=[gameItem objectForKey:@"againstuserid"];
                //add to the players game array
                [myGameArray addObject:obj];

            }
            NSLog(@"array: %@", myGameArray);

当我尝试从JSON数组提取数据时，收到以下错误。 -[__ NSCFString objectForKey：]：无法识别的选择器已发送到实例0x1f06f4e0

提前致谢，

缺口

Answer 1

由于键盘command的对象不是字典，因此代码已中断。

您可以像这样修改代码。

    for (NSString *key in json){
        id object = json[key];
        if ([object isKindOfClass:[NSDictionary class]]) {
           Game *obj = [Game new];
           obj.GameID=[gameItem objectForKey:@"gameid"];
           obj.Argument=[gameItem objectForKey:@"argument"];
           obj.CaseFor=[gameItem objectForKey:@"casefor"];
           obj.CaseAgainst=[gameItem objectForKey:@"caseagainst"];
           obj.CaseForOwner=[gameItem objectForKey:@"forusername"];
           obj.CaseAgainstOwner=[gameItem objectForKey:@"againstusername"];
           obj.CaseForOwnerID=[gameItem objectForKey:@"foruserid"];
           obj.CaseAgainstOwnerID=[gameItem objectForKey:@"againstuserid"];
           //add to the players game array
          [myGameArray addObject:obj];
    }

我建议在Game类中创建一个initWithDictionary:(NSDictionary *)dictionary以获取更简洁的代码。

Answer 2

您需要将类型gameItem“ NSMutableDictionary ”更改为“ id ”并添加检查if ([gameItem isKindOfClass: [NSDictionary Class]]) ，在这种情况下，请初始化“ obj ”