在IOS中解析嵌套的JSON代码 [英] Parse nested JSON code in IOS

问题描述

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.

I'm trying to parse the following JSON code in iOS. The JSON code consists of an array of games numbered 0 to x. I've been searching around but cant seem to find any examples which have JSON in this format.

{
"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时遇到了麻烦，感谢您的任何帮助或建议.

I've created a game object, and for each item in the JSON array, I want to create a new game object, and add this to the game array. I'm having trouble parsing the JSON, and i'd appreciate any help or advice.

我要使用的代码是

            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

When I try extracting data from the JSON array, I receive the following error. -[__NSCFString objectForKey:]: unrecognized selector sent to instance 0x1f06f4e0

预先感谢

尼克

推荐答案

该代码已中断，因为键command的对象不是字典.

The code is breaking as the object for the key command is not a dictionary.

您可以像这样修改代码.

You can modify the code like this.

    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];
    }

我建议在您的Game类中创建一个initWithDictionary:(NSDictionary *)dictionary，以获得更简洁的代码.

I would suggest to make an initWithDictionary:(NSDictionary *)dictionary in your Game class for more cleaner code.

这篇关于在IOS中解析嵌套的JSON代码的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！