Question

您好我正在尝试将Json字符串解析为NSArray并将某些结果保存为字符串，以便为我的应用中的不同用户设置权限。我目前的代码是：

NSError *jsonParsingError1 = nil;
        accountData = [NSJSONSerialization JSONObjectWithData:jsonAccount
                                                   options:NSJSONReadingMutableContainers error:&jsonParsingError1];

accountData是在.h文件中创建的NSMutableArray。 jsonAccount是通过转换NSString

创建的NSData

阵列的NSLog输出是;

  {
    account = "XXXX";
    companyName = XXXXX;
    id = XXXXX;
    websites =         (
                    {
            account = "XXXXX";
            accountId = XXXXX;
            anonymiseIP = 0;
            companyName = XXXXX;
            XXXX = 0;
            domains =                 (
                "XXXXX"
            );
            features =                 {
                advancedSegmentation = 1;
                attentionHeatmaps = 1;
                domains = 0;
                dotHeatmaps = 1;
                goalConversionTracking = 1;
                interactionHeatmaps = 1;
                leadInfo = 0;
                scrollHeatmaps = 1;
                timeHeatmaps = 1;
                users = 0;
                valueHeatmaps = 1;
                visitorPlayback = 1;
                visitorScoring = 1;
                visitors = 1;
            };
            fixedElementSelector = "";
            flagClicksReceived = 0;
            flagDataReceived = 0;
            flagGoalsReceived = 0;
            flagInteractionsReceived = 0;
            flagScrollsReceived = 0;
            id = XXXXX;
            interactionSelector = "";
            name = "XXXX";
            permissions =                 (
                segments,
                heatmaps,
                visitors,
                campaigns,
                support,
                globalSettings,
                websiteSettings
            );
            setCookies = 1;
            status = 1;
            statusMessage = "";
            statusString = OK;
            trialling = 1;
        }
    );
},

当我尝试从其中一个结果创建一个sting并将其显示在日志中时，我收到此错误：

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFArray:]: unrecognized selector sent to instance 0x6a950f0'

如何将不同的密钥保存为字符串？

Answer 1

看起来你的JSON是一个Dictionary而不是一个Array。

Answer 2

您的JSON不是数组，您应该像NSDictionary一样解析它

Answer 3

解析JSON后，您应该测试它返回的对象类型。 E.g：

if ([accountData isKindOfClass:[NSArray class]]) {
   // handle like an array
} else if ([accountData isKindOfClass:[NSDictionary class]]) {
   // handle like a dictionary
}

Answer 4

您的JSON是一个包含四个键的字典：account，companyName，id和website。

关键＆＃34;网站＆＃34;会给你一个数组。

您可以遍历＆＃34;网站＆＃34;数组，每个元素都是字典。

＆＃34;网站中的每个词典＆＃34;数组有很多键，如account，accountId，anonymiseIP等。其中一些键具有字典或数组的值。

在NSLog语句中，（a，b，c）将是一个数组，而{a = x; b = y; c = z;将是一本字典。

Answer 5

您的服务器响应是字典，因此将accountData更改为字典

在下面写下NSLog，你会在其中获得信息

[accountData objectForKey:@"account"];
[accountData objectForKey:@"companyName"];
[accountData objectForKey:@"id"];
[[accountData objectForKey:@"websites"] count];//array
[[[accountData objectForKey:@"websites"] objectAtIndex:0]objectForKey:@"account"];
[[[accountData objectForKey:@"websites"] objectAtIndex:0]objectForKey:@"domains"];
[[[[accountData objectForKey:@"websites"] objectAtIndex:0]objectForKey:@"domains"]count]; //array
[[[[accountData objectForKey:@"websites"] objectAtIndex:0]objectForKey:@"domains"]objectAtIndex:0];

iOS - 如何在xcode中解析Json数组并保存结果是字符串

5 个答案: