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

Lei zheng
Lei zheng
7,990 Points

Let's assume that the courseURL we created earlier returns some JSON data from Treehouse API. Create a data object to ca

I try to find out why. I type the code on my xcode, and download the version from teacher pasan. My xcode report

"value of optional type "NSURL?" not unwrapped; did you mean to use ! or ??

so I added ! to forecastURL.

now the data is ok. but this coding challenge. I can never pass it.

students_code.swift
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)

let //courseData = NSData (contentsOfURL: courseURL!)

1 Answer

Here is what I used to pass it looks like NSData.dataWithContentsOfURL was deprecated in Xcode 6.1. The third constant should be...

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

then delete this line

let //courseData = NSData (contentsOfURL: courseURL!)