如何解析这样的json数组？

Question

我在尝试解析以下json数组时遇到困难。 如何解析。 网络中的其他答案似乎无法解决我的问题。

{
  "status": 1,
  "value": {
    "details": [
      {
        "shipment_ref_no": "32",
        "point_of_contact": {
          "empid": ""
        },
        "products": {
          "0": " Pizza"
        },"status": "2"
      },
      {
        "shipment_ref_no": "VAPL/EXP/46/14-15",
        "point_of_contact": {
          "empid": "60162000009888"
        },
        "products": {
          "0": "MAIZE/CORN STARCH"
        },
        "status": "5"
      }
    ]
  }
}

我必须访问每个键的值。

以下是我的代码

NSString* pendingResponse = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

NSData *jsonData = [pendingResponse dataUsingEncoding:NSUTF8StringEncoding];

NSDictionary *jsonDic = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingAllowFragments error:nil];
NSArray *argsArray = [[NSArray alloc] initWithArray:[jsonDic objectForKey:@"details"]];
NSDictionary *argsDict = [[NSDictionary alloc] initWithDictionary:[argsArray objectAtIndex:0]];
NSLog(@"keys = %@", jsonDic[@"values"]);

Answer 1

这是解析整个字典的方法：

NSDictionary *dataDictionary = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];

    NSArray *details = [[dataDictionary objectForKey:@"value"] objectForKey:@"details"];

    for (NSDictionary *dic in details) {
        NSString *shipmentRefNo = dic[@"shipment_ref_no"];
        NSDictionary *pointOfContact = dic[@"point_of_contact"];
        NSString *empId = pointOfContact[@"empid"];

        NSDictionary *products = dic[@"products"];
        NSString *zero = products[@"0"];
        NSString *status = dic[@"status"];

    }

Answer 2

NSString *pendingResponse = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];    
NSData *jsonData = [pendingResponse dataUsingEncoding:NSUTF8StringEncoding];    
NSDictionary *jsonDic = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingAllowFragments error:nil];
NSArray *argsArray = [[NSArray alloc] initWithArray:[jsonDic objectForKey:@"details"]];

//argsArray holds objects in form of NSDictionary.
for(NSDictionary *response in argsArray) {
   //String object
    NSLog(@"%@", [response valueForKey:@"shipment_ref_no"]);
   //Dictionary object
    NSLog(@"%@", [[response objectForKey:@"point_of_contact"] valueForKey:@"empid"]);
   //String object
    NSLog(@"%@", [response valueForKey:@"status"]);
   //Dictionary object
    NSLog(@"%@", [[response objectForKey:@"products"] valueForKey:@"0"]);
}

我相信您一定应该要求服务器开发人员更新响应格式。

另外，您始终可以使用Model类来解析数据。 请检查一下如何将NSDictionary转换为自定义对象 。

是的，我正在使用此网站来检查我的json响应。

Answer 3

你可以解析...

NSDictionary *jsonDic = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingAllowFragments error:nil];
NSDictionary *dictValue = [[NSDictionary alloc] initWithDictionary:[jsonDic objectForKey:@"value"]];

NSArray *arrDetails = [[NSArray alloc] initWithArray:[dictValue objectForKey:@"details"]];

for (int i=0; i<arrDetails.count; i++) 
{
    NSDictionary *dictDetails=[arrDetails objectAtIndex:i];
    NSDictionary *dictContact = [[NSDictionary alloc] initWithDictionary:[dictDetails objectForKey:@"point_of_contact"]];
    NSDictionary *dictProduct = [[NSDictionary alloc] initWithDictionary:[dictDetails objectForKey:@"products"]];
}

Answer 4

编辑：以下答案在javascript中！

您可以使用以下方式解析json数据：

var array = JSON.parse(data);

然后您将获得如下所示的所有信息：

var refno = array["value"]["details"][0]["shipment_ref_no"];

Answer 5

NSDictionary *response = //Your json
NSArray *details = response[@"value"][@"details"]

等。很容易

Answer 6

如下更新代码。 您正在尝试从顶层读取details数组，而在您的数据中则是使用value键。 因此，您应该阅读值dict，并在其中阅读details数组。

NSString* pendingResponse = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSData *jsonData = [pendingResponse dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary *jsonDic = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingAllowFragments error:nil];
NSDictionary *valueDict = [jsonDic objectForKey:@"value"];
NSArray *argsArray = [[NSArray alloc] initWithArray:[valueDict objectForKey:@"details"]];
NSDictionary *argsDict = [[NSDictionary alloc] initWithDictionary:[argsArray objectAtIndex:0]];
NSLog(@"keys = %@", jsonDic[@"values"]);

Answer 7

我认为您的问题是您有：

NSLog(@"keys = %@", jsonDic[@"values"]);

但是应该是：

NSLog(@"keys = %@", jsonDic[@"value"]);

Answer 8

以下是解析JSON数组的代码。 我曾经从文件中解析JSON数组，但是您也可以使用响应链接来做到这一点。

// using file
NSString *str = [[NSBundle mainBundle] pathForResource:@"test" ofType:@"json"];
NSData *data = [[NSData alloc]initWithContentsOfFile:str];
NSMutableDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
NSMutableDictionary *dictValues = [[NSMutableDictionary alloc]initWithDictionary:[dict valueForKey:@"value"]];
NSMutableArray *array = [[NSMutableArray alloc]initWithArray:[dictValues valueForKey:@"details"] copyItems:YES];

NSLog(@"Array Details :- %@",array);

// using url
NSURL *url = [NSURL URLWithString:@"www.xyz.com"]; // your url
NSData *data = [[NSData alloc]initWithContentsOfURL:url];
NSMutableDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
NSMutableDictionary *dictValues = [[NSMutableDictionary alloc]initWithDictionary:[dict valueForKey:@"value"]];
NSMutableArray *array = [[NSMutableArray alloc]initWithArray:[dictValues valueForKey:@"details"] copyItems:YES];

NSLog(@"Array Details :- %@",array);