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

Posted by Giorgi Gulua
Giorgi Gulua
5,956 Points

Swift Recap Part 1: can not pass the challenge but works fine in playgrounds

Can anyone please tell me what am I doing wrong here? '''swift 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: "SomeTitle", author: "Some Guy", tag: Tag(name: "TAGTAG")).description()

let postDescription = firstPost

'''

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.name)"
    }

}

let firstPost = Post(title: "SomeTitle", author: "Some Guy", tag: Tag(name: "TAGTAG")).description()

let postDescription = firstPost

1 Answer

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

There are two issues:

  1. You are calling the description method on the line where you create the firstPost constant, that causes that constant to be assigned the description string, rather than an instance of the Post struct like it is supposed to.

  2. You have not capitalized the word "Filed" in your string, challenges tend to be very picky about strings so even capitalizing the string wrong will often cause your code to not pass.

If you fix those two issues:

struct Tag {
  let name: String
}
struct Post {
    let title: String
    let author: String
    let tag: Tag
    func description() -> String {
        // Changed filed to Filed
        return "\(title) by \(author). Filed under \(tag.name)" 
    }

}

// Store Post instance in firstPost 
let firstPost = Post(title: "SomeTitle", author: "Some Guy", tag: Tag(name: "TAGTAG"))

// Store result of description method in postDescription 
let postDescription = firstPost.description()

Then your code will work.

Giorgi Gulua
Giorgi Gulua
5,956 Points

it works , Thank you so much