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iOS Object-Oriented Swift Inheritance Overriding Methods

Martin Franzner
Martin Franzner
3,300 Points
Posted by Martin Franzner
Martin Franzner
3,300 Points

double is not identical, overriding methods, roundButton

swift_lint.swift:14:9: error: 'Double' is not identical to 'UInt8' width += points

the preview says this, I have tried everything, but I`ve done like Amit did in the video...

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

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

    func incrementBy(points: Double) -> Double {
        return
        width += points
        height += points
    }
}

class RoundButton: Button {
    var cornerRadius: Double = 5.0

    override func incrementBy(_ points:Double = 7.0) -> Double {
        return super.incrementBy(points)

    }
}
Enrique Munguía
Enrique Munguía
14,311 Points
Enrique Munguía
Enrique Munguía
14,311 Points

The problem is that your function says it returns a double, but returns nothing. Just remove the return type and the return keyword.

1 Answer

pjc90
pjc90
10,267 Points
pjc90
pjc90
10,267 Points

I did it like this and it was correct.

class Button {
  var width: Double
  var height: Double

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

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

class RoundButton: Button {
  var cornerRadius: Double = 5.0

  override func incrementBy(_ points: Double = 7.0){
    width += points
    height += points
  }
}