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iOS Build a Weather App with Swift (Retired) Pulling Data From the Web Fetching JSON Data

Posted by Craigg Bergeron
Craigg Bergeron
7,320 Points

Code Challenge Fetching JSON Data

Bummer! You need to assign the result of the NSData call to the courseData constant.

and my code is

import Foundation

let treehouseBaseURL = NSURL(string: "https://api.teamtreehouse.com/")

let courseURL = NSURL(string: "/course/(courseID)", relativeToURL: treehouseBaseURL)

let courseData = NSData.dataWithContentsOfURL(courseURL , options: nil , error: nil)

4 Answers

Ben Griffith
Ben Griffith
5,808 Points
Ben Griffith
Ben Griffith
5,808 Points

Hey, since XCode 6.1 there have been some changes made to Swift, including NSData.

NSData.dataWithContentsOfURL(courseURL , options: nil , error: nil)

has since been replaced by

NSData(contentsOfURL:courseURL!, options: nil, error: nil)

NB - Be sure to unwrap the optional of courseURL

So a working example would be;

import Foundation
let treehouseBaseURL = NSURL(string: "https://api.teamtreehouse.com/")
let courseURL = NSURL(string: "/course/\(courseID)", relativeToURL: treehouseBaseURL)

let courseData = NSData(contentsOfURL: courseURL!, options: nil, error: nil)
Craigg Bergeron
Craigg Bergeron
7,320 Points

thank you i even tried to change it to the NSData(contentsOfURL instead but it didn't want to work for me their either but probably because i forgot to unwrap so thank you

Anthony Price
Anthony Price
1,412 Points
Anthony Price
Anthony Price
1,412 Points 
import Foundation
let treehouseBaseURL = NSURL(string: "https://api.teamtreehouse.com/")
let courseURL = NSURL(string: "/course/\(courseID)", relativeToURL: treehouseBaseURL)
let courseData = NSData(contentsOfURL:courseURL!, options: nil, error: nil)

```Swift
This Works!
Nicolas Pasut
Nicolas Pasut
1,796 Points
Nicolas Pasut
Nicolas Pasut
1,796 Points

Why hasn't been this updated in the courses? I lost value time trying to find this! Thanks for the answers :)

Stephen Whitfield
Stephen Whitfield
16,771 Points
Stephen Whitfield
Stephen Whitfield
16,771 Points

Haven't done this course, but I'm assuming you're using string interpolation in the courseURL assigning? If so, make it 

let courseURL = NSURL(string: "/course/\(courseID)", relativeToURL: treehouseBaseURL)