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iOS Object-Oriented Swift Inheritance Inheritance and Initializers

Sahit penmatcha
Sahit penmatcha
4,555 Points
Posted by Sahit penmatcha
Sahit penmatcha
4,555 Points

Whats wrong with this code?

I cant find the problem

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

1 Answer

William Li
PLUS
William Li
Courses Plus Student 26,868 Points
William Li
William Li
Courses Plus Student 26,868 Points

Hi, Sahit penmatcha Have you made any changes to the original code template provided by the challenge? I don't see any, perhaps I'm missing sth here.

anyhow, for this challenge, the problem of the code is that the init method in the RoundButton class was passed in 3 arguments, cornerRadius is okay, but for the other two, you need to call in the init method from its super class to initialize them.

class RoundButton: Button {
  var cornerRadius: Double = 5.0

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

Hope it helps.