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iOS

Posted by Chirs Davies
Chirs Davies
6,379 Points

help please

Let's assume that the courseURL we created earlier returns some JSON data from Treehouse API. Create a data object to capture this information, and store it in a constant named courseData. Hint: Use the NSData class. You can set options and error to nil.

import Foundation

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

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

let courseData = NSData(dataWithContentsOfURL: options: nil, error: nil)
Cody Coats
Cody Coats
7,469 Points

Are you getting errors?

Chirs Davies
Chirs Davies
6,379 Points

yeah its saying, Bummer! You need to call the dataWithContentsOfURL method on NSData.?

6 Answers

Glen Burnett
Glen Burnett
Courses Plus Student 27,349 Points

Okay this sucker of a code challenge has been bothering me for days! I reported what I thought to be some potential bug issues but I have found the solution to this challenge. I am going to put everyone out of their misery by providing the solution....

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

This worked for me. A couple of times it sort of timed out and gave me that sorry there was a problem communicating and I had to re-try the challenge but a third time it accepted it. THIS is the correct solution guys.

Hope this puts many poor souls out of their misery :)

Bretney Scott
Bretney Scott
20,319 Points
Bretney Scott
Bretney Scott
20,319 Points

Try changing dataWithContentsOfUrl to contentsOfURL

Uday Singh
Uday Singh
2,999 Points 
import Foundation
let treehouseBaseURL = NSURL(string: "https://api.teamtreehouse.com/")
let courseURL = NSURL(string: "/course/\(courseID)", relativeToURL: treehouseBaseURL)
let courseData = NSData.contentsOfURL(url:courseURL, options:nil, error:nil)

^ Still results in error.

Bretney Scott
Bretney Scott
20,319 Points

Did you change dataWithContentsOfUrl to contentsOfURL in the second code that Chirs used? I tried that and it came out right for me.

Peter Simpson
PLUS
Peter Simpson
Courses Plus Student 15,526 Points
Peter Simpson
Peter Simpson
Courses Plus Student 15,526 Points

You need to do it the old redundant way, as it is shown in the video or else it wont work in the simulator. try this code --- 

let courseData = NSData.dataWithContentsOfURL(url:courseURL, options:nil, error:nil)
Cody Coats
Cody Coats
7,469 Points
Cody Coats
Cody Coats
7,469 Points

You aren't passing anythin go the method dataWithContentsOfURL

you have set options to nil and error to nil. but data you have left blank.

Uday Singh
Uday Singh
2,999 Points
Uday Singh
Uday Singh
2,999 Points

I'm getting the same error.

Chirs Davies
Chirs Davies
6,379 Points
Chirs Davies
Chirs Davies
6,379 Points 
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)

I passed courseURL but im still getting an error?