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iOS Object-Oriented Swift Inheritance What is Inheritance?

Erik Trinidad
Erik Trinidad
3,696 Points

What is Inheritance, Task 3 of 3. What's wrong with my code?

class Button { var width: Double var height: Double

init(width:Double, height:Double){ self.width = width self.height = height } }

class RoundButton: Button { var cornerRadius: Double = 5.0 }

let rounded = RoundButton() //this line particularly

Button.swift
class Button {
  var width: Double
  var height: Double

  init(width:Double, height:Double){
    self.width = width
    self.height = height
  }
}

class RoundButton: Button {
  var cornerRadius: Double = 5.0
}

let rounded = RoundButton()

2 Answers

Daniel Sattler
Daniel Sattler
4,867 Points

You did fine so far, you just forgot to assign values to the super class

instead of

let rounded = RoundButton()

try

var rounded = RoundButton(width: 2.0,height: 2.0)

Variable or constant doesn't matter in this case... and 2.0 is just an example... important is that you give the Super Class some values so it knows what to do. I hope this helps