如何在iOS中的JSON响应中检查密钥是否可用

Question

After i request to the server , i recieve two different type of response

if it is success response will be this

[{"id":5,"is_default":0,"name":"Dutch","language_id":3},{"id":4,"is_default":1,"name":"French","language_id":2}]

other response type would be

 {"status":102,"response":"Empty record list."}

Is the any way to detect whether the "status" key is available or not in response in objc. Thanks

found a solution

   //break it from result tag    
if([[responseString JSONValue] isKindOfClass:[NSDictionary class]]){

    NSDictionary *dict = [responseString JSONFragmentValue];

    if([dict count]==2){
      return;
    }
    //nothing to load

}

Answer 1

Parse the JSON response into object . Check if parsed object is dictionary , then check the key "status" .

If the parsed object is an array , then access the results from index .

Answer 2

The response is just a dictionary, so to see if you have the key you are looking for you can just use the NSDictionary methods:

// Assume you have already created a dictionary, jsonResponse, from your JSON

// First, get all the keys in the response

NSArray *responseKeys = [jsonResponse allKeys];

// Now see if the array contains the key you are looking for

BOOL isErrorResponse = [responseKeys containsObject:@"status"];