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iOS

Posted by Frank Ogwaro
Frank Ogwaro
Courses Plus Student 7,941 Points

NSURL string? Pulling Data from the Web

To access information about a course we can use a URL like: https:// api.teamtreehouse.com/course/COURSE_ID. Given the variable courseID, create an absolute URL, named courseURL, to retrieve information about a user's progress on a certain course. It should have a path that's relative to the treehouseBaseURL.

I'm not sure what I'm suppose to pass in for the NSURL string. My thought was to pass in the courseID using string interpalation but it didn't work. Help would be much appreciated. 

import Foundation

let courseID = 25

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

7 Answers

hui yi yeh
hui yi yeh
7,199 Points 
let courseID = 25
let treehouseBaseURL = NSURL(string: "https://api.teamtreehouse.com/")
let courseURL = NSURL(string: "course/\(courseID)", relativeToURL: treehouseBaseURL)
MUZ140563 Brighton Madire
MUZ140563 Brighton Madire
4,365 Points
MUZ140563 Brighton Madire
MUZ140563 Brighton Madire
4,365 Points

let courseID = 25 let treehouseBaseURL = NSURL(string: "https://api.teamtreehouse.com/") let courseURL = NSURL(string: "course/(treehouseCourseID)", relativeToURL: treehouseBaseURL)

Frank Ogwaro
PLUS
Frank Ogwaro
Courses Plus Student 7,941 Points
Frank Ogwaro
Frank Ogwaro
Courses Plus Student 7,941 Points

I tried that but it tells me that I need to convert the courseID variable to a string.

Samuel Behrens
Samuel Behrens
4,576 Points

Can you just put qutoations around the 25:

let courseID = "25"

Frank Ogwaro
PLUS
Frank Ogwaro
Courses Plus Student 7,941 Points
Frank Ogwaro
Frank Ogwaro
Courses Plus Student 7,941 Points

No it wants me to pass a value in for the NSURL string.

Samuel Behrens
Samuel Behrens
4,576 Points
Samuel Behrens
Samuel Behrens
4,576 Points

I just entered this in exactly and it said it was right:

import Foundation

let courseID = 25

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

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

Frank Ogwaro
PLUS
Frank Ogwaro
Courses Plus Student 7,941 Points
Frank Ogwaro
Frank Ogwaro
Courses Plus Student 7,941 Points

Thanks hui yi yeh! After many tries your solution worked. :)

Samuel Behrens
Samuel Behrens
4,576 Points
Samuel Behrens
Samuel Behrens
4,576 Points

Try this:

import Foundation

let courseID = 25

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

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

You needed to put the "course(courseID)/" in the courseURL because it is what you are adding to the base URL