Objective-C Language NSDictionary NSDictionary to JSON
Example
NSDictionary *myDictionary = [[NSDictionary alloc] initWithObjectsAndKeys:@"value1", @"key1", @"value2", @"key2", nil];
NSMutableDictionary *mutableDictionary = [myDictionary mutableCopy];
NSData *data = [NSJSONSerialization dataWithJSONObject:myDictionary options:NSJSONWritingPrettyPrinted error:nil];
NSString *jsonString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
