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iOS Object-Oriented Swift Inheritance Inheritance and Initializers

Gregory Marquet
Gregory Marquet
8,391 Points

Stuck on adding designated initializer

The challenge question states to fix the code to be able to run. I added the super.init(width:Double, height:Double) at the end of the RoundButton class in order to initialize the super.
Any help would be greatly appreciated! Thank you!

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 = 5.0

  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, try passing arguments to your super.init() like this:

class RoundButton: Button {
    var cornerRadius: Double = 5.0

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