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iOS

Posted by Claire Kiren
Claire Kiren
2,413 Points

Swift Weather app- println(weatherDictionary)

When I do the println(weatherDictionary) nothing happens where the output should be. I even pasted his code in and nothing happened.

Andres Oliva
Andres Oliva
7,810 Points

Where are you calling the println function?

Claire Kiren
Claire Kiren
2,413 Points

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 currentWeatherDictionary: NSDictionary = weatherDictionary["currently"] as NSDictionary
            println(currentWeatherDictionary["temperature"])
        }

3 Answers

Andres Oliva
Andres Oliva
7,810 Points
Andres Oliva
Andres Oliva
7,810 Points

I believe you may be getting an error. Try writing "println(response, error)" inside the closure (after -> void in ) before the condition if (error == nil). Then you should get some output in the console.

If you get "nil, (something)", then you are encountering an error and therefore not even entering the if statement. If you do get an error like "-1009" I think, you have run into a bug of Xcode 6, you only need to close the project and run it again. If you get a response, then something is wrong with your code, but first try that println() and check for any errors.

Claire Kiren
Claire Kiren
2,413 Points

okay, thank you!!

Michael Bowie
Michael Bowie
2,807 Points

Thank you as well! It was error "-1005" for me. Restart did the trick.

Kyle Pontius
Kyle Pontius
6,190 Points
Kyle Pontius
Kyle Pontius
6,190 Points

Good question,

I would probably start by checking your spelling in the "Current" class and see if temperature value is being stored with that same spelling. Hopefully so.

Also, in comparing it to my code from the project, you're missing the line where you pass in the dictionary to the "Current" class and it returns a Current object (see below). Also, when you make this change, try:

println(currentWeather.temperature)

Getting Current() object:

let dataObject = NSData(contentsOfURL: location)
let weatherDictionary = NSJSONSerialization.JSONObjectWithData(dataObject!, options: nil, error: nil) as NSDictionary
let currentWeather = Current(weatherDictionary: weatherDictionary)

Hopefully this helps! Kyle

Claire Kiren
Claire Kiren
2,413 Points

okay, thank you!!

Andres Oliva
Andres Oliva
7,810 Points
Andres Oliva
Andres Oliva
7,810 Points

If that doesn't work, make sure that you have downloadTask.resume() at the end :)