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iOS Object-Oriented Swift Class Inheritance Overriding Methods

Not understanding what I have done wrong

When I click on check work it gives me this message "Bummer! You need to override the implementation for the fullName() method to pass the challenge", but I'm pretty sure I've done so.

objects.swift
class Person {
  let firstName: String
  let lastName: String 

  init(firstName: String, lastName: String) {
    self.firstName = firstName
    self.lastName = lastName
  }

  func fullName() -> String {
    return "\(firstName) \(lastName)"
  }
}

// Enter your code below

class Doctor: Person {
    override init(firstName: String, lastName: String) {
        super.init(firstName: firstName, lastName: lastName) 
    }
    override func fullName() -> String {
        return "\(firstName) \(lastName)"
    }
}

let someDoctor = Doctor(firstName: "Dr.", lastName: "Smith")
someDoctor.fullName()

3 Answers

Hi there,

An overidden function needs to do something different to the function in the superclass. Yours doesn't at the moment.

You need to change the returned value from "Sam Smith" to "Dr. Smith" - that makes it different.

Try something like:

class Doctor : Person{
  override func fullName() -> String {
    return "Dr. \(lastName)"
  }
}

let someDoctor = Doctor(firstName: "Steve", lastName: "Hunter")

You don't need the init method, either, as it is doing nothing different to the superclass version.

Steve.

Jeff McDivitt
Jeff McDivitt
23,970 Points

You need to override the function with the correct return that the challenge is asking for:

class Person {
  let firstName: String
  let lastName: String 

  init(firstName: String, lastName: String) {
    self.firstName = firstName
    self.lastName = lastName
  }

  func fullName() -> String {
    return "\(firstName) \(lastName)"
  }
}

// Enter your code below

class Doctor: Person {

override func fullName() -> String {

return "Dr. \(lastName)"

  }

}

let someDoctor = Doctor(firstName: "Jeff", lastName: "McDivitt")
someDoctor.fullName()

Thanks. I understand now what going on.

Glad you got it. Shout if I can help with anything else. :+1:

Steve.