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

Giorgos Karyofyllis
Giorgos Karyofyllis
21,276 Points
Posted by Giorgos Karyofyllis
Giorgos Karyofyllis
21,276 Points

Instance method declaration

I get an error " Make sure you're declaring an instance method named description and returns a String". The program runs correctly on Xcode playground. What is wrong?

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

let firstPost = Post(title: "iOSDevelopment", author: "Apple", name: "Swift")
let postDescription = firstPost.description()
Steve Hunter
Steve Hunter
57,712 Points

No problem! :+1:

1 Answer

Steve Hunter
Steve Hunter
57,712 Points

Hi Giorgos,

Very close with that - you just need to create the Tag instance in your parameter to pass into the init method:

let firstPost = Post(title: "iOSDevelopment", author: "Apple", tag: Tag(name: "Swift"))

You then need to change your init method to accept a Tag as a parameter:

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

Make sense?

Steve,

Giorgos Karyofyllis
Giorgos Karyofyllis
21,276 Points
Giorgos Karyofyllis
Giorgos Karyofyllis
21,276 Points

Yes that make sense but unfortunently the same error again!

Steve Hunter
Steve Hunter
57,712 Points

Give me a minute ...

Giorgos Karyofyllis
Giorgos Karyofyllis
21,276 Points
Giorgos Karyofyllis
Giorgos Karyofyllis
21,276 Points

If it helps it works on xcode but not on treehouse editor..

Steve Hunter
Steve Hunter
57,712 Points

The compiler doesn't like your spacing - change 

func description() ->String{

to 

func description() -> String {

That works here. Oh, and you don't need the init method, apparently; it works without here!

Steve.