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iOS Build a Simple iPhone App with Swift 2.0 Getting Started with iOS Development Swift Recap Part 1

Why am I getting an error about string interpolation when I believe I am using it correctly?

I am trying to pass the challenge for creating an instance method and I am getting an error about string interpolation:

"Make sure the implementation of description matches the directions. Hint: Use string interpolation!"

structs.swift
struct Tag {
    let name: String
}

struct Post {
    var title: String
    var author: String
    let tag: Tag
    func description() -> String {
        return "\(title) by \(author). Filled under \(tag.name)"

    }
}

let firstPost = Post(title: "iOSDevelopment", author: "Apple", tag: Tag(name: "swift"))
let postDescription = firstPost.description()

2 Answers

Steven Deutsch
Steven Deutsch
21,046 Points

Hey Jeremiah Jacquet,

It may not be a problem with string interpolation but rather the resulting string does not match what the challenge is asking for.

struct Tag {
    let name: String
}

struct Post {
    var title: String
    var author: String
    let tag: Tag
    func description() -> String {
       // I think you need to change "Filled" to "Filed"
        return "\(title) by \(author). Filed under \(tag.name)"

    }
}

let firstPost = Post(title: "iOSDevelopment", author: "Apple", tag: Tag(name: "swift"))
let postDescription = firstPost.description()

Hope this helps.

Silly human errors, thank you.