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iOS Object-Oriented Swift Inheritance What is Inheritance?

Brittany D
Brittany D
1,767 Points
Posted by Brittany D
Brittany D
1,767 Points

I don't understand what's wrong

Says it can't identify

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 =  5.0

}

var rounded = RoundButton(width: 10.0, height: 10.0)
}