How to set a Dictionary as Value in POST API Call - Objective C

Question

I am making an API call in which the Parameters are as:

{
      name : XYZ,
      marks : { maths : 34 }
}

I am using JSON model for making API calls and handling the response.

Here is how I made params Dict:

NSMutableDictionary *paramsDict = [[NSMutableDictionary alloc] init];

NSMutableDictionary *marksDict = [[NSMutableDictionary alloc] init];
[marksDict setObject:"34" forKey:"maths"];

[paramsDict setObject:marksDict forKey:@"marks"];

[paramsDict setObject:@"XYZ" forKey:@"name"];

Here Goes my API CALL

APIManager *apimanager = [[APIManager alloc] init];
apimanager.delegate = self;

[apimanager getServerDataWithParam:paramsDict apiMethodType:kAPIMethodTypePOST andMapperClass:[StudentMarks class]];

My App Crashes giving me this Crash Log

Assertion failure in +[JSONHTTPClient urlEncode:], /Users/Documents/JSONHTTPClient.m:122
2016-08-12 12:46:16.653 ClassMgmt[30227:1338857] *** Terminating app due to uncaught exception 
'NSInternalInconsistencyException', reason: 'request parameters can be only of NSString or NSNumber classes.
'{   maths = 34; }' is of class __NSDictionaryM.'

I don't want to convert my NSDictionary to NSString using:

[NSString stringWithFormat:@"@", aDictionary];

Is their any other way I can send NSDictionary as a value in POST Request as a parameter?

try this `[marksDict setObject:[NSNumber numberWithInt:34] forKey:@"maths"];` — Anbu.Karthik, Aug 12 '16 at 07:36

score 0 · Answer 1 · answered Aug 12 '16 at 07:39

0

Long-story-short; HTTP POST parameters can only be name/value pairs without hierarchy.

If you want to post JSON, on the other hand, that is part of the HTTP POST body, not the parameters.

answered Aug 12 '16 at 07:39

Droppy

9,691
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so what should I do ? – Rahul Aug 12 '16 at 07:56
@RahulMishra I've never used JSONModel, so I don't know how you use it to post JSON. Perhaps just use one of the standard Apple libraries instead. – Droppy Aug 12 '16 at 07:59

score 0 · Answer 2 · answered Aug 12 '16 at 07:40

0

NSData * jsonData = [NSJSONSerialization dataWithJSONObject:dict options:kNilOptions error:nil]
NSString *paramsjsonStr = [[NSString alloc] initWithData: jsonData encoding:NSUTF8StringEncoding]

answered Aug 12 '16 at 07:40

ocarol

283
1
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How to set a Dictionary as Value in POST API Call - Objective C

2 Answers2