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

Posted by William Hopkins
William Hopkins
2,005 Points

"Your code could not be compiled" even though there are no errors in my preview and it works perfectly fine in Xcode?

I don't see any syntax errors. Maybe there's a logic error? I don't know why I can't complete this exercise. This exact same code is working fine in Xcode.

structs.swift 
struct Tag {
  let name: String
}

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

  func description() {
    print("\(title) by \(author). Filed under \(tag)")
  }
}

let firstPost = Post(title: "Test", author: "Will", tag: Tag(name: "Tag"))

let postDescription = firstPost.description()

2 Answers

Steve Hunter
Steve Hunter
57,712 Points

Hi William,

In your description string for tag, you want to interpolate \(tag.name) not just \(tag).

Steve.

andren
andren
28,558 Points
andren
andren
28,558 Points

In addition the task requests that the string should be returned, not printed. So William has to change the description method to return the string.

Steve Hunter
Steve Hunter
57,712 Points

Sorry - also missed the fact that your description function didn't return a String and you printed the output, rather than returning it.

Amend your description method to:

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

That returns a string in its signature and then returns a string in its body as required by the challenge.

Steve.

Steve Hunter
Steve Hunter
57,712 Points

Got that, andren - done at the same time. Good spot!!

William Hopkins
William Hopkins
2,005 Points
William Hopkins
William Hopkins
2,005 Points

Haha, whoops! I definitely took an odd route there. Time to practice my Swift basics :P

Thanks for the help!

Steve Hunter
Steve Hunter
57,712 Points

:+1: :smile: