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iOS Protocols in Swift Creating Flexible Objects Using Protocols Protocol Inheritance

vivek d
vivek d
iOS Development Techdegree Student 1,596 Points

how to solve this?

can anyone explain, please

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

protocol Pet : Animal {
   var cuddlyName: String { get }
}

struct Dog {
  var cuddlyName : String
}

1 Answer

Matthew Long
Matthew Long
28,379 Points

You're off to a good start. You need to make the Dog struct conform to Pet using :. Once you do that you simply give Dog the properties of both the Pet and Animal protocols. Don't forget that by conforming to Pet, Dog will also conform to Animal so it needs cuddlyName and numberOfLegs.

protocol Animal {
  var numberOfLegs: Int { get }
}

protocol Pet: Animal {
  var cuddlyName: String { get }
}

struct Dog: Pet {
  var numberOfLegs: Int
  var cuddlyName: String
}

Hopefully I explained that in a way that made sense.