Question

I got this result

{lhs: "1 U.S. dollar", rhs: "44.5097254 Indian rupees", error: "", icc: true}

in NSString with ASIHTTPRequest method.

But I wanna read only 44.5097254 in one NSString. How to do so?

Answer 1

You can get it with the following Methode

-(NSString*)getNumberFromString(NSString*)theString{
    NSError *error = NULL;
    NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"rhs: \"(([0-9]*[.]*[0-9]*)*)" options:NSRegularExpressionCaseInsensitive | NSRegularExpressionAnchorsMatchLines error:&error];
    NSArray *matches = [regex matchesInString:theString options:0 range:NSMakeRange(0, [theString length])];
    NSTextCheckingResult *match = [matches objectAtIndex:0];
    return [theString substringWithRange:[match rangeAtIndex:1]]);

}

You can find more information about NSRegularExpressionin the Apple Documentation