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iOS Object-Oriented Swift Inheritance What is Inheritance?

Posted by AHMAD ALSHOMAR
AHMAD ALSHOMAR
1,860 Points

I cannot create an instance of class

I cannot create an instance of class RoundButton and name of the instance rounded

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(points:Double())
}

2 Answers

Steve Hunter
Steve Hunter
57,712 Points

You need to move your creation of the instance outside of the class definition. Then you must use the constructor from the parent/super class, I think - I can't see that it has been overridden. This should get you through:

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: 5, height: 5)
AHMAD ALSHOMAR
AHMAD ALSHOMAR
1,860 Points

It's give me an error.

Steve Hunter
Steve Hunter
57,712 Points

Worked for me. What error are you getting?

AHMAD ALSHOMAR
AHMAD ALSHOMAR
1,860 Points
AHMAD ALSHOMAR
AHMAD ALSHOMAR
1,860 Points

Thank you bro. :)