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

Posted by davidmartin
davidmartin
4,288 Points

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
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.

println(forecastURL)

becomes

println(forecastURL!)

I hope this helps ;-)

Daniel Sattler
Daniel Sattler
4,867 Points
Daniel Sattler
Daniel Sattler
4,867 Points

how did you define forecastURL ?

davidmartin
davidmartin
4,288 Points
davidmartin
davidmartin
4,288 Points

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

davidmartin
davidmartin
4,288 Points
davidmartin
davidmartin
4,288 Points

Thanks a lot , I forget the "!" symbol