Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

iOS Build a Weather App with Swift (Retired) Pulling Data From the Web Making a Network Call

On the playground i get an optional value of forecastURL

On my playground the value of

println(forecastURL) is
"Optional(42.012898,-4.515968 -- https://api.forecast.io/forecast/0818ad4e96f643b80ceb76b5b7b82289/)" so let weatherData = NSData(contentsOfURL: forecastURL!, options: nil, error: nil) is nil

4 Answers

Daniel Sattler
Daniel Sattler
4,867 Points

Oh sorry hehe... i didn´t see this in your previous post. to unwrap an optional item you do so by adding a " ! " at the end.




I hope this helps ;-)

Daniel Sattler
Daniel Sattler
4,867 Points

how did you define forecastURL ?

let apiKey="0818ad4e96f643b80ceb76b5b7b82289" let baseURL = NSURL(string: "https://api.forecast.io/forecast/\(apiKey)/") let forecastURL = NSURL(string: "42.012898,-4.515968", relativeToURL: baseURL)

Thanks a lot , I forget the "!" symbol