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

Posted by Philip Ladendorf
Philip Ladendorf
11,298 Points

Code is working in Xcode but compiler is not accepting

Hello, my code is working fine in Xcode and i cant find any bugs, but i always get the message of compiler errors! In preview mode is no error shown.

How can i solve this challenge?

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 {
   let result = "\(title) by \(author). Filed under \(tag.name)"
   return result
  }
}

let firstPost = Post(title: "Wetter", author: "John Doe", name: "Test")

let postDescription = firstPost.description()

2 Answers

Greg Kaleka
Greg Kaleka
39,021 Points
Greg Kaleka
Greg Kaleka
39,021 Points

Hi Phillip,

You've created an interesting initializer for Post (I'd want to use this as a convenience initializer, rather than default, but I like it), but the challenge isn't expecting anything but the default initializer, which is why it's throwing an (unhelpful) error. If you remove your initializer, you can create an instance like this:

let firstPost = Post(title: "Wetter", author: "John Doe", tag: Tag(name: "Test"))

Make sense?

Cheers :beers:

-Greg

Philip Ladendorf
Philip Ladendorf
11,298 Points
Philip Ladendorf
Philip Ladendorf
11,298 Points

Hello Greg,

thank you very much! I made this custom initializer because i thought its not possible to initialize the struct "tag" directly in the parameterlist of the Post - initializer.

Enjoy your weekend!

Philip

Greg Kaleka
Greg Kaleka
39,021 Points
Greg Kaleka
Greg Kaleka
39,021 Points

Yeah I like it as a convenience initializer, but if you were building a real blog app, you'd often want to pass in existing tags. You'd probably have them already initialized themselves, something like this:

// somewhere earlier in your code
let testTag = Tag(name: "Test")

// somewhere later in your code
let firstPost = Post(title: "Wetter", author: "John Doe", tag: testTag)

Happy Saturday to you as well :smile: