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

Olivier de Broqueville
Olivier de Broqueville
1,013 Points
Posted by Olivier de Broqueville
Olivier de Broqueville
1,013 Points

I get a "Bummer¨" compiler error message. But no error is shown!

After checking my work, I get a compile error message, but selecting the Preview tab shows a blank screen!

structs.swift 
struct Tag {
  let name: String
}

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

  init(title: String, author: String, name: String) {
    self.title = title
    self.author = author
    self.tag = Tag(name: name)
  }

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

let firstPost = Post(title: "iOS Development", author: "Apple", name: "swift")

let postDescription = firstPost.description()

1 Answer

Steve Hunter
Steve Hunter
57,712 Points

Hi Olivier,

You're getting an error here because your Post struct isn't quite working as expected. The tests in the challenge are expecting to be able to send an instance of Tag into Post when creating a new Post instance. Your code doesn't allow this as it wants a String to be sent in.

You have everything correct except for this. So, delete your init method. You don't need it. Then, in your call to create a Post instance, create a Tag instance and send in a name property as you create a new instance inside the constructor/init call for the Post struct. (And lose the self. bits in your description func - they work but aren't needed).

That all looks like: 

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: "iOS Development", author: "Apple", tag: Tag(name: "swift"))

let postDescription = firstPost.description()

Let me know how you get on.

Steve.