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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 Elijah Florence
Elijah Florence
Courses Plus Student 3,225 Points

Why is my code not working

IT says make sure you are declaring an instance method named description that returns string. As far as I thought I had done this, but it is not going through

structs.swift 
struct Tag {
    let name: String
}

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

func decription() -> String{
var description1 = ("\(title) by \(author). Filed under \(tag)")
return(description1)
}
}

let firstTag = Tag(name: "Swift 2.0")
let firstPost = Post(title:"DinoRace", author: "Elijah Florence", tag: firstTag)

3 Answers

Stephen McMillan
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Stephen McMillan
iOS Development with Swift Techdegree Graduate 33,994 Points
Stephen McMillan
.a{fill-rule:evenodd;}techdegree seal-36
Stephen McMillan
iOS Development with Swift Techdegree Graduate 33,994 Points

Hi Elijah,

A few mistakes here which is why the challenge isn't passing.

Firstly, you named it 'decription' instead of 'description'. :)

Next, in that method you need to use string interpolation which you have done correctly to an extent. Whilst you pass in name and author correctly you only passed in 'tag'. You actually need to say 'tag.name' to get the name string out of the firstTag constant. This name property comes from the struct Tag.

func description() -> String{
    var description1 = "\(title) by \(author). Filed under \(tag.name)" // This is changed to tag.name
    return(description1)
}

You also do not need the () around the string, instead you can just do = "".

The challenge also asks you to call the description function on firstPost and assign the value returned to a constant called postDescription. This is missing from your code above. You can do this like so below where you create an instance of Post.

let postDescription = firstPost.description()

These changes will pass for you.

However there is one other thing I'd like to say - you do not have to create a variable inside the function if you just want to return a value. Instead, you can just return the string like so.

return "\(title) by \(author). Filed under \(tag.name)"

Hope this helped.

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

Stephen - I edited your last code block to have tag.name instead of just tag to avoid confusion.

Cheers :beers:

-Greg

Elijah Florence
PLUS
Elijah Florence
Courses Plus Student 3,225 Points
Elijah Florence
Elijah Florence
Courses Plus Student 3,225 Points

Thanks guys! I didn't even think about the fact that calling tag is calling the struct not just a variable from the struct. Glad I learned that now

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

No worries - I've literally been asked to answer this question about a dozen times. The tag/tag.name trips up people A LOT. Happy coding! :thumbsup:

Dirk Florence
Dirk Florence
10,891 Points
Dirk Florence
Dirk Florence
10,891 Points

Mispelled words often break my code.

  • dad