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iOS Object-Oriented Swift Inheritance Inheritance and Initializers

i cannot get this corrected in the code, i tried this steps super.init(width:Double, height:Double)

super.init(width:Double, height:Double)

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

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

  func scaleBy(points: Double){
    width += points
    height += points
  }
}

class RoundButton: Button {
  var cornerRadius: Double

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

1 Answer

Stepan Ulyanin
Stepan Ulyanin
11,318 Points

Hi, you basically need to call the init method from the superclass passing the width and the heght of the RoundButton object, try using super.init(width: width, height: height) instead of super.init(width:Double, height:Double):

class Button {
    var width: Double
    var height: Double

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

    func scaleBy(points: Double){
        width += points
        height += points
    }
}

class RoundButton: Button {
    var cornerRadius: Double

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