IPhone : Cannot invoke to != nil in x code 6.1 generating error please help the code is given below\

func parser(parser: NSXMLParser!, didEndElement elementName: String!, namespaceURI: String!, qualifiedName qName: String!) {

    if(elementName as NSString).isEqualToString("item"){
        if ftitle != nil{
        elements.setObject(self.ftitle, forKey: "title")
        }
        if link != nil {
            elements.setObject(self.link, forKey: "link")
        }
        if fdescription  != nil{
        elements.setObject(self.fdescription, forKey: "description")
        }

        feeds.addObject(elements)
    }


}