Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

iOS Swift 2.0 Protocols Creating Flexible Objects Using Protocols Protocol Inheritance

Bryan Leung
Bryan Leung
5,420 Points

I don't know why my code cannot be compiled for the struct of Dog

protocol AnimalType { var numberOfLegs : Int { get } }

protocol PetType: AnimalType { var cuddlyName: String { get } }

struct Dog: PetType {

}

protocols.swift
protocol AnimalType {
  var numberOfLegs : Int { get }
}

protocol PetType: AnimalType {
  var cuddlyName: String { get }
}

struct Dog: PetType {
}

Where are those variables?

1 Answer

Bryan Leung
Bryan Leung
5,420 Points

Thanks very much, I fount that I forgot to place my declaration of vars inside the struct.