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iOS Object-Oriented Swift Classes and Objects Classes and Their Methods

Ryan Anderson
Ryan Anderson
4,610 Points

Having trouble with Challenge Task 1 of 1.

We need to provide a means to increase the size of our Button. So we are going to add a method named incrementBy which will accept a parameter named points. (Within the method add points to the width and height properties).

class Button {
  var width: Double
  var height: Double

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

  func incrementBy(points: Double) -> Double {

1 Answer

William Li
William Li
Courses Plus Student 26,868 Points

Hi, Ryan, firstly, In your function definition, you're correct to pass in (points: Double) as parameter, however, this function doesn't have a return type; it only increment both the width and height attributes by argument points.

The correct incrementBy function look sth like this.

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

Hope it helps.