If you're having trouble with this section of the course, it's not your fault.

Hey everyone!

From the project files supplied along with this video, I was able to make two small changes to get the project to run and return the same results as the video.

let weatherData = NSData(contentsOfURL: forecastURL!, options: nil, error: nil)

First, I used NSData(contentsOfURL rather than NSData.dataWithContentsOfURL. Second, I unwrapped the forecastURL optional. Ramon and Jake are doing a great job pointing you guys in the right direction and in fact the usage of the optional binding in their code samples is safer so please use that. Great job guys :)

This post does bring up a larger issue though. This is a screenshot from the Xcode 6.1 release notes. Swift is brand new and Apple is iterating on it very fast. With every iteration of Swift and Xcode, things willchange. As the screenshot indicates, lots of changes were made to Foundation (the framework where NSString, NSData and NSURL come from) as well as UIKit and many others. That is why issues like this are coming up. NSData(contentsOfURL:) did not exist when I wrote the course, but now the older method has been deprecated.

Pay specific attention to the last line in the screenshot - This audit effort is ongoing which means that it may change again.

Unfortunately, issues like the one this post raises, will come up again until Swift and Cocoa are finally audited all the way through. This is just how Swift is going to be for at least another year. For things like having to unwrap the result of a method, Xcode is actually quite helpful and will suggest a fix automatically. For other things like deprecated methods, usually if you option + click on the method, you can check out the docs and they point you in the right direction.

The iOS community here on Treehouse is doing a great job of letting everyone know how to go around these changes and I'll let the mods know as well. Amit and I are still figuring out how to go about this. We didn't expect Apple to break so many things with every single release.

Hope this helps!

Jake,

I'm sorry to say that your solution returns a nil in mine as well. What's crazy is that that the playground returns a nil, but when I execute the program, the console log does seem to show the data. But, when I input the data into jsonpretty.com (next video), it doesn't recognize the data as JSON?

Treehouse,

I think we need your HELP!

This will give me the following error: "Bound value in a conditional binding must be of Optional type" I did try to fix it by using the following code:

 // Do any additional setup after loading the view, typically from a nib.

        let baseURL = NSURL(string: "https://api.forecast.io/forecast/")
        let encodedPoints = location.stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding)! // This method returns an optional, we need to force unwrap

        let forecastURL = NSURL(string: encodedPoints, relativeToURL: baseURL)

        // We have to optionally bind because this method returns an optional and we need to act on the value it returns.

        let weatherData = NSData(contentsOfURL: forecastURL, options: nil, error: nil)

        println(weatherData)

But this code will give me the following error: Thread 1: EXC_BAD_ACCESS (code = 1, acces = 0x0)

I tried adding the API-key and ! to forecastURL but still no luck. I have the following code in a playground but still getting an error.

2014-10-26 22:43:54.780 jsonPractice[1839:77626] NSURLConnection/CFURLConnection HTTP load failed (kCFStreamErrorDomainSSL, -9807) nil

import UIKit
import Foundation

let apiKey = "b8d132a872db1f7ad18a2d6d49994e06"
let locationPoints = "51.5073,-0.1274"

let baseURL = "https://api.forecast.io/forecast/b8d132a872db1f7ad18a2d6d49994e06"
let encodedPoints = locationPoints.stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding)! // This method returns an optional, we need to force unwrap


if let forecastURL = NSURL(string: "\(baseURL)/\(encodedPoints)") {

let weatherData = NSData(contentsOfURL: forecastURL, options: nil, error: nil)

    println(weatherData) }

let weatherData = NSData(contentsOfURL: forecastURL!, options: nil, error: nil)

that needs to be your <weatherData> constant definition.

Nick Calabro -> remove the space in your string:

Pasan, With Ramon & Jake's fix, I got thru the JSON video fine. But, the Challenge Task 1 of 1 is still looking for "NSData.dataWithContentsOfURL" instead of "NSData(contentsOfURL". I will skip the Challenge for now and go on to the next video.
Thanks.