gistfile1.swift

    func getCurrencyData() {
        //http://www.freecurrencyconverterapi.com/api/v3/convert?q=USD_PHP
        let convertToRates = "convert?q=USD_EUR"
        let baseURL = NSURL(string: "http://www.freecurrencyconverterapi.com/api/v3/")
        let currencyURL = NSURL(string: "\(convertToRates)", relativeToURL: baseURL)
        let sharedSession = NSURLSession.sharedSession()
        println(sharedSession)
        println(currencyURL)
        let downloadTask: NSURLSessionDownloadTask = sharedSession.downloadTaskWithURL(currencyURL!, completionHandler: { ( location: NSURL!, response:NSURLResponse!, error: NSError!) -> Void in
        let dataObject = NSData(contentsOfURL: location!)
            println(dataObject)
        let currencyDictionary: NSDictionary = NSJSONSerialization.JSONObjectWithData(dataObject!, options: nil, error: nil) as NSDictionary
            if let results = currencyDictionary["results"] as? NSDictionary {
            println(results)
                if let results2 = results["USD_EUR"] as? NSDictionary {
                    println(results2)
                    if let multiplierRate = results2["val"] as? Double{
                         dispatch_async(dispatch_get_main_queue(), { () -> Void in
                        self.exchangeRate = multiplierRate
                            println(self.exchangeRate)
                        })
                    }
                }
                
            }
            
        })
        downloadTask.resume()
    }