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

Posted by Bob Dylan
Bob Dylan
593 Points

App crashing due to fatal error

Everytime I run this code: let weatherData = NSData(contentsOfURL: forecastURL!, options: nil, error: nil) it gives me a fatal error saying ; unexpectedly found nil while unwrapping an Optional value

2 Answers

John Sanchez
John Sanchez
3,325 Points
John Sanchez
John Sanchez
3,325 Points

I figured it out. Just delete the space in the Forecast URL between the longitude and latitude coordinates.

Jean-Samuel Deshaies
Jean-Samuel Deshaies
1,508 Points
Jean-Samuel Deshaies
Jean-Samuel Deshaies
1,508 Points

Had the same problem, thanks for that!

Muhammad Arafat
Muhammad Arafat
5,677 Points
Muhammad Arafat
Muhammad Arafat
5,677 Points

try to use let weatherData = NSData(contentsOfURL: forecastURL!, options: 0, error: nil)