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

Seth Dobrin
Seth Dobrin
1,459 Points


I get the above error when running my code...

let baseURL = NSURL(string:"https://api.forecast.io/forecast/\(apiKey)/")
let forecastURL = NSURL(string: "38.607550, -90.622682", relativeToURL:baseURL)
let weatherData = NSData(
    contentsOfURL: forecastURL!,
    options: nil,
    error: nil)

and I can't seem to figure out what the cause is. my monthly allotment in forecast.io does not get decrement either

1 Answer

Chris Shaw
Chris Shaw
26,650 Points

Hi Seth,

This error has caught quite a number of students off guard and it's quite hard to spot if you're new to iOS development, the error is being caused by the space in the coordinates value you have; after the comma which NSURL objects don't like, simply remove that space and the error will go away.

let forecastURL = NSURL(string: "38.607550,-90.622682", relativeToURL: baseURL)

Happy coding!