Error Message

import UIKit

class ViewController: UIViewController {

    private let apiKey = "masked"

    override func viewDidLoad() {
        super.viewDidLoad()

        let baseURL = NSURL(string: "https://api.forecast.io/forecast/\(apiKey)/")
        let foreCastURL = NSURL(string: "37.8267, -122.423", relativeToURL: baseURL)
        let weatherData = NSData(contentsOfURL: foreCastURL!, options:nil , error: nil)

        println(weatherData)


    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}