Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

iOS Object-Oriented Swift 2.0 Complex Data Structures Adding Instance Methods

James Daubert
James Daubert
4,256 Points
Posted by James Daubert
James Daubert
4,256 Points

On the calling of functions within structs?

Should my func inside the struct have a parameter? It didn't need one to pass the first test. Can I call functions from within structs?

structs.swift 
struct Person {
    let firstName: String
    let lastName: String
    func getFullName()->String {
      return "\(firstName) \(lastName)" 
      }
}

let aPerson = Person.init(firstName: "james", lastName: "daubert")
let fullName = getFullName(aPerson)

1 Answer

Michael Hulet
Michael Hulet
47,913 Points
Michael Hulet
Michael Hulet
47,913 Points

You can definitely call methods that are defined on structs, but the syntax in the last couple lines of your post is a little weird. In the line where you create the aPerson constant, you can technically initialize a struct or class like that, but it won't work in all cases. You should write that line like this, instead:

let aPerson = Person(firstName: "james", lastName: "daubert") //You don't need to write out the .init part

If you want to call the getFullName method on an instance of Person, you just have to specify which instance by using the dot syntax, instead of passing the instance into the function, like this:

let fullName = aPerson.getFullName()