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iOS Object-Oriented Swift Class Inheritance Overriding Methods

Posted by Jeffrey Hallett
Jeffrey Hallett
Courses Plus Student 1,619 Points

Code Challenge: Overriding Methods || Need Help

I don't understand why this isn't working, the error is about converting the type "String.Type" to string or something like that.

Thanks, Jeffrey

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

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

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

class Doctor: Person {
    override init(firstName: String, lastName: String){
      super.init(firstName: String, lastName: String)
      self.firstName = "Dr."
      self.lastName = lastName
    }
}

let someDoctor = Doctor(firstName: "Jeffrey", lastName: "Hallett")

1 Answer

mrtroy
mrtroy
8,069 Points
mrtroy
mrtroy
8,069 Points

In your Doctor class you are overriding the firstName and lastName hence the override init line.

Then you need to pass the values in from the super class. As an example you can look at the LaserTower class in the video starting about the 2 minute mark. You will see this:

override init(x: Int, y: Int) {
        super.init(x: x, y: y)
        self.range = 100
        self.strength = 100
    }

Notice the syntax in the super.init line. It looks a little strange at first but you should be able to figure it out from there.

Happy Coding!

Jeffrey Hallett
Jeffrey Hallett
Courses Plus Student 1,619 Points

Thanks!