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

Michael Murray
Michael Murray
6,037 Points
Posted by Michael Murray
Michael Murray
6,037 Points

Getting compile error. Gives the hint: "Use string interpolation". Can someone look at what I have in my code?

My code: 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: "Heat", author: "MICHAEL MANN", tag: Tag(name: "Action")) let postDescription = firstPost.description()

structs.swift 
struct Tag {
    let name: String
}
Stefano Mainardi
Stefano Mainardi
4,722 Points

I'm getting the same error... And I did same as you... The only difference I put self.title, self.author and self.tag.name inside the string interpolation

Michael Murray
Michael Murray
6,037 Points
Michael Murray
Michael Murray
6,037 Points

Stefano Mainarde, I tried what you recommended - put self.title, self.author and self.tag.name inside the string interpolation and it worked. Not 100% clear why but I am going to explore further why it needed the self. leaders.

3 Answers

Digvijay Jaiswal
Digvijay Jaiswal
5,565 Points
Digvijay Jaiswal
Digvijay Jaiswal
5,565 Points

Stefano Mainardi and Michael Murray, guys try the code below...

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)") //tag.name is for accessing the name

    }

}


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

let postDescription = firstPost.description()
Stefano Mainardi
Stefano Mainardi
4,722 Points
Stefano Mainardi
Stefano Mainardi
4,722 Points

Thank you. Guys when I got the error I was using the treehouse App on my iPad... So I tried to write the code using the website and it worked. Maybe there's a problem with string interpolation in the app. I noticed that in the sentence "..Apple. Filed under swift" , the word "Filed" changed color from orange to purple, so I think that's the problem.

Digvijay Jaiswal
Digvijay Jaiswal
5,565 Points
Digvijay Jaiswal
Digvijay Jaiswal
5,565 Points

Stefano Mainardi can you mark the answer as the right answer. It will be easier for others to find.