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iOS Object-Oriented Swift Class Inheritance Overriding Methods

Nils Sens
Nils Sens
9,654 Points
Posted by Nils Sens
Nils Sens
9,654 Points

I get an extra arg error. why?

I tried to copy the structure from the lessons. Did I miss something?

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

let someDoctor = Doctor(firstName:"Sam", lastName:"Smith")

2 Answers

Maria Angelica Dadalt
Maria Angelica Dadalt
6,197 Points
Maria Angelica Dadalt
Maria Angelica Dadalt
6,197 Points

The problem here is that you only need to override the superclass' method, not the initializer. Since the Doctor subclass has no properties, you have nothing to initialize.

The class should look like this:

class Doctor: Person {
    override func fullName() -> String {
        return "Dr. \(lastName)"
    }
}
Nils Sens
Nils Sens
9,654 Points
Nils Sens
Nils Sens
9,654 Points

amazing, thank you for taking the time!! :)