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Invalid JSON record type (NSConcreteData)?

I use AFNetworking to publish audio with some data. I get the following exception.

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Invalid type in JSON write (NSConcreteData)'

I am using this code.

 dict=@ {@"access_token":[defaults valueForKey:@"TOKEN"],@"email":email,@"prayer":passData}; if ([NSJSONSerialization isValidJSONObject:dict]) { NSLog(@"Proper JSON Object"); } NSError *error; NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dict options:NSJSONWritingPrettyPrinted error:&error]; NSURL *URL = [NSURL URLWithString:url]; NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:URL cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:10]; [request setHTTPMethod:@"POST"]; [request setValue: @"application/json" forHTTPHeaderField:@"Content-Type"]; [request setHTTPBody:jsonData]; AFHTTPRequestOperation *op = [[AFHTTPRequestOperation alloc] initWithRequest:request]; op.responseSerializer = [AFJSONResponseSerializer serializerWithReadingOptions:NSJSONReadingAllowFragments]; [op setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {}

I need to post values ​​in this format

 { "access_token" = 2cf0d8a66654fa4f; email = ""; prayer = { audio = <63616666 00010000 64657363 00000000 00000020 40e58880 00000000 696d6134 00000000 00000044 00000040 00000002 00000000 6b756b69 00000000 00000000 66726565 0000000> 98903013 31faae9c bb7b0780 80808080>; "category_id" = ""; description = ""; "expired_date" = "Expiration Date"; "is_audio" = 1; "is_urgent" = 0; "prayer_access_id" = ""; "prayer_type_id" = 1; subject = ""; }; }

I don’t know why this is happening, I published the values ​​before this format, but when I try to publish audio as data, I get this exception. thanks in advance

Edit

Here i do the data

  NSData *audioFile=[self audioData]; if (audioFile==nil) { [passData setObject:@"" forKey:@"audio"]; [passData setObject:@"0" forKey:@"is_audio"]; }else{ [passData setObject:audioFile forKey:@"audio"]; [passData setObject:@"1" forKey:@"is_audio"]; } -(NSData *)audioData{ NSArray *dirPaths = NSSearchPathForDirectoriesInDomains( NSDocumentDirectory, NSUserDomainMask, YES); NSString *docsDir = [dirPaths objectAtIndex:0]; NSString *soundFilePath = [docsDir stringByAppendingPathComponent:@"recordTest.caf"]; NSURL *url = [NSURL fileURLWithPath:soundFilePath]; NSData *audioData=[NSData dataWithContentsOfURL:url]; return audioData; }

this is what i insert in the sound file

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2 answers

The problem is that you cannot put NSData in JSON. audio - NSData . Because the NSJSONSerialization documentation says:

An object that can be converted to JSON must have the following properties:

  • The top-level object is an NSArray or NSDictionary .

  • All objects are instances of NSString , NSNumber , NSArray , NSDictionary or NSNull .

  • All dictionary keys are instances of NSString .

  • Numbers are not NaN or infinity.

If you want to include NSData in JSON, you need to convert it to a string. A common way to do this is to base64 encode it (and then, at the destination, decode the base64 string).

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You have a syntax error in your Json text. check it out at http://www.jsoneditoronline.org and try again if you are sure that it is correctly formed. Json

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