Can't make the network call here

What kind of error message are you getting? I just tried the code and it works fine, I guess the error is somewhere else, can you give us some more information?

Yes exactly, worked just fine, even in a new created playground using the following code:

let apiKey : String     =   "MY_API_KEY"
let baseURL = NSURL(string:"https://api.forecast.io/forecast/\(apiKey)/37.8267,-122.423")
let weatherData = NSData.dataWithContentsOfURL(baseURL, options: nil, error: nil)

println(weatherData)

let jsonResponse : AnyObject? = NSJSONSerialization.JSONObjectWithData(weatherData, options: nil, error: nil)
println(jsonResponse)

I'm getting a perfect valid json response at the end. Can you show me the whole source of the file?

UPDATE

I don't know how I did it exactly but I managed to have the Stormy App work as in the teacher's video. I would say my code is exactly the same as it was before creating the thread . I know this sound like a really stupid sentence, but the only chance that I have made is resetting the apiKey and restarting my mac. Still I haven't managed to sort out that thing with the playground code that the nice Kai Schuerrer provided.

For now I thank him so much for the help. It made me accomplish the relevant needed tasks and I can move on without throwing my computer out of the window! ;)

I am not getting a particular error, simply the error which is the 2 line code that I have pasted. It returns the error that I am declaring on the second line.

What do you mean it worked for you? Did those 2 lines of code create the constant weatherData and downloaded the url content Kai Schuerrer ?

Thank you Kai Schuerrer for your effort.

My complete code is:

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    let baseURL = NSURL(string:"https://api.forecast.io/forecast/\(apiKey)/")
    let forecastURL = NSURL(string: "https://api.forecast.io/forecast/\(apiKey)/37.8267,-122.423", relativeToURL: baseURL)

    let sharedSession = NSURLSession.sharedSession()
    let downloadTask: NSURLSessionDownloadTask = sharedSession.downloadTaskWithURL(forecastURL, completionHandler: { (location: NSURL!, response: NSURLResponse!, error: NSError!) -> Void in

        if (error == nil) {
            let dataObject = NSData(contentsOfURL: location)
            let weatherDictionary: NSDictionary = NSJSONSerialization.JSONObjectWithData(dataObject, options: nil, error: nil) as NSDictionary

            let currentWeather = Current(weatherDictionary: weatherDictionary)
            dispatch_async(dispatch_get_main_queue(), { () -> Void in
                self.temperatureLabel.text = "\(currentWeather.temperature)"
                self.iconView.image = currentWeather.icon!
                self.currentTimeLabel.text = "At \(currentWeather.currentTime!) it is"
                self.humidityLabel.text = "\(currentWeather.humidity)"
                self.precipitationLabel.text = "\(currentWeather.precipProbability)"
                self.summaryLabel.text = "\(currentWeather.summary)"
            })

        }
    })

    downloadTask.resume()

}

But I do not think the problem is in there.

I have just tried to use your new playground's code and stil I get nil: which is the error that we fill in the dataWithContentsOfURL line.

It seems to me that my xcode just does not communicate with the internet anymore: I have just used your brand new code in a new playground and still same problem as before.

It is not a matter of asynchronous task or related stuff. I can't explain nor find out why the 3 simple lines of code in the playground can't lead to the network call.

Oh sorry Kai Schuerrer

The forecastURL was like that because of the many tries I have tried and I left in that extra string and I apologize for confusion.

But even if it is good know I still have problems. So the problem is not in there.

The fact that your playground code (just copied and pasted into a playground from your reply and changing the apiKey (literally filling it into the string without even caring about security)) returns nil is crazy to me. I really can't understand this behavior.

Now I have restarted my computer and I seem to be getting some network call (as the api dashboard shows) and I will investigate it now. But My main question is now about that simple playground code that works for you and not for me.

I have tried to reset the apiKey also but still nothing which looks surprisingly incredible to me as now the only difference between my code in the playground and yours is the apiKey. I haven't literally touched anything apart from copying and pasting the string into the apiKey constant ...

Great! Really glad you got it working now. Keep it up!

Just wanted to add that this affected me too and restarting the computer fixes it!