从JSON数组objective-c获取值的问题

Posted 2023-03-15

【中文标题】从JSON数组objective-c获取值的问题

【英文标题】：problem getting a value from a JSON array objective-c

【发布时间】：2011-08-31 13:20:15

【问题描述】：

我从 UPX 服务器接收 JSON 数组，但我无法获取值

我需要来自“relation_data”的对象“名称”，但我无法进入“relation_data”

我就是这样做的

NSLog(@"All of the arrays: %@", json);
    NSDictionary *Allinfo = [json objectForKey:@"response"];//I go into "response"
    NSLog(@"All with response array: %@", Allinfo);
    NSDictionary *datainfo = [Allinfo objectForKey:@"data"];//i go into "data"
    NSLog(@"Data : %@", datainfo);

但是我如何进入“relation_data”并获取“name”的值？

response = (    
data =     (
                        
                    "business_data_rev" = 12;
                    "contact_set_rev" = 15;
                    currency = EUR;
                    "date_added" = "2011-08-31 12:10:59.338664+02";
                    "date_invoiced" = "2011-08-31 12:10:59.338664+02";
                    "date_modified" = "2011-08-31 12:11:04.45442+02";
                    "date_paid" = "2011-08-31 12:10:59.408335+02";
                    description = "";
                    id = 104;
                    name = "Invoice #104";
                    "person_rev" = 12;
                    realid = 104;
                    "relation_data" =             
                        id = 12;
                        iscreditor = 0;
                        isdebitor = 1;
                        isprivate = 0;
                        name = "Emre.";
                        "subaccount_id" = 9;
                    ;
        )

【参考方案1】：

试试这个

[dataInfo valueForKeyPath:@"relation_data.name"];

【讨论】：

hmm，如果我这样做，我会在 1 个变量（例如字符串）中获得所有名称（104 条记录），我怎样才能得到 1 乘 1？

试试[[dataInfo objectAtIndex:0] valueForKeyPath:@"relation_data.name"]

谢谢解决这个问题当我添加字典然后设置valueforkeypath。