iOS- Cannot get expected json results back

iOS- Cannot get expected json results back

I am trying to use google currency rest api to get USD->GBP convert
result. something like this->
http://www.google.com/ig/calculator?hl=en&q=100USD=?GBP
the json is response is :
{lhs: "100 U.S. dollars",rhs: "62.9802242 British pounds",error: "",icc:
true}
so i m trying to get the values from "lhs" "rhs" stored into 2 strings
here is my method for fetching converted result data :
@implementation ConvertorBrain
-(id)initWithFromCurrency:(NSString *)fromCurrency
toCurrency:(NSString *)toCurrency
withAmount:(int)amount
{
if (self=[super init]) {
self.fromCurrency = fromCurrency;
self.toCurrency = toCurrency;
self.amount = amount;
}
return self;
}
-(void)getConvertResult
{
NSString *encodeFromCurrencyTerm = [self.fromCurrency
stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSString *encodeToCurrencyTerm = [self.toCurrency
stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSString *searchLocation = [NSString
stringWithFormat:@"http://www.google.com/ig/calculator?hl=en&q=%d%@=?%@",
self.amount, encodeFromCurrencyTerm, encodeToCurrencyTerm];
NSURL *convertedResults = [NSURL URLWithString:searchLocation];
NSData *JSONData = [[NSData alloc]
initWithContentsOfURL:convertedResults];
if ([JSONData length] > 0) {
NSError *error = nil;
NSDictionary *dictoionary = [NSJSONSerialization
JSONObjectWithData:JSONData options:0 error:&error];
if (!dictoionary) {
NSLog(@"Json parsing failed: %@", error);
}
self.lhs = [dictoionary valueForKey:@"lhs"];
self.rhs = [dictoionary valueForKey:@"rhs"];
} else {
[[[UIAlertView alloc] initWithTitle:@"Service Error"
message:@"Cannot complete your request at this time, please try
later" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]
show];
}
}
then i called method in some other place like this :
self.brain = [[ConvertorBrain alloc] initWithFromCurrency:@"USD"
toCurrency:@"GBP" withAmount:100];
[self.brain getConvertResult];
then my expected lhs and rhs results should be lhs= "100 U.S. dollars" rhs
="62.9802242 British pounds"
however, if i run the code, it throw me back these errors: Error
Domain=NSCocoaErrorDomain Code=3840 "The operation couldn't be completed.
(Cocoa error 3840.)" (No string key for value in object around character
1.) UserInfo=0x7172860 {NSDebugDescription=No string key for value in
object around character 1.}
i cannot figure out what has went wrong..need help, also, i tried to debug
it a bit. it seems is this line went wrong, dosent get any data somehow ->
NSData *JSONData = [[NSData alloc]
initWithContentsOfURL:convertedResults];