Question

I’m trying to create a JSON object that looks like this:

  { "request_type":"send_string" "security_level":0 "device_type":"ios" "blob":{"string":"blah"}"}

Here’s my attempt:

NSDictionary *blobData = [NSDictionary dictionaryWithObjectsAndKeys:
                          sendString,@"string",
                          nil];
NSString *blobString = [[NSString alloc]
                        initWithData:[NSJSONSerialization dataWithJSONObject:blobData options:kNilOptions error:&error]
                        encoding:NSUTF8StringEncoding];
NSLog(@"Blob Created: %@", blobString);
NSDictionary *requestData = [NSDictionary dictionaryWithObjectsAndKeys:
                             @"send_string",@"request_type",
                             0,@"security_level",
                             @"ios",@"device_type",
                             //No Email Provided, This is just for testing
                             blobString,@"blob",
                             nil];

NSData *JSONRequestData = NULL;
if ([NSJSONSerialization isValidJSONObject:requestData]) {
    NSLog(@"Proper JSON Object");
    JSONRequestData = [NSJSONSerialization dataWithJSONObject:requestData options:kNilOptions error:&error];
}
else {
    NSLog(@"requestData was not a proper JSON object");
    return FALSE;
}
NSLog(@"%@",[[error userInfo] objectForKey:@"NSDebugDescription"]);
NSLog(@"%@",[[NSString alloc] initWithData:JSONRequestData encoding:NSUTF8StringEncoding]);

The problem is, that last NSLog tells me all I’ve created is something like this:

{"request_type":"send_string"}

So when I go and try to write this to the server with

[NSJSONSerialization writeJSONObject:JSONRequestData toStream:outputStream options:0 error:&error];

I get this error from the console:

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** +[NSJSONSerialization writeJSONObject:toStream:options:error:]: Invalid top-level type in JSON write'

Answer 1

Replace this line

0,@"security_level"

with

[NSNumber numberWithInt:0],@"security_level"