Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

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

Ruben Mercado
Ruben Mercado
1,933 Points
Posted by Ruben Mercado
Ruben Mercado
1,933 Points

am i missing something

i think im doing the string interpolation right but it says its wrong

structs.swift 
struct Tag {
  let name: String
}

struct Post{
let title: String
let author: String
let tag: Tag

func description() -> String{
return "\(title) by \(author). Filed under \(tag)"
}
}
let firstPost = Post(title: "firstpost", author: "ruben", tag: Tag(name: "Ruben"))

let postDescription = firstPost.description()

1 Answer

Matthew Long
Matthew Long
28,407 Points
Matthew Long
Matthew Long
28,407 Points

You're very close with this. If you write your code in Xcode you'd see that postDescription as you have it reads "firstpost by ruben. Filed under Tag(name: "Ruben")". This is good indication that you need to add the property name to your tag interpolation:

struct Tag {
  let name: String
}

struct Post{
  let title: String
  let author: String
  let tag: Tag

  func description() -> String{
    return "\(title) by \(author). Filed under \(tag.name)"
  }
}

let firstPost = Post(title: "firstpost", author: "ruben", tag: Tag(name: "Ruben"))

let postDescription = firstPost.description()