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

Carter Selman
Carter Selman
1,660 Points
Posted by Carter Selman
Carter Selman
1,660 Points

Learning Classes

I can't figure what I'm supposed to do in this problem. I'm getting the message: You forgot to add 'points' to the property 'width' within the 'incrementBy' method. Thank you

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){
    points + width + height
  }
}

2 Answers

Jo Albright
Jo Albright
5,199 Points
Jo Albright
Jo Albright
5,199 Points

You are in the right direction, but they are wanting you to add "points" to the "width" and "height" properties.

func incrementBy(points: Double){
    self.width += points
    self.height += points
}
Jo Albright
Jo Albright
5,199 Points
Jo Albright
Jo Albright
5,199 Points

+= is a special operation that adds a value to the value on the left and updates the value on the left

var num = 100
num += 100 // same as num = num + 100

// num == 200 is true
Carter Selman
Carter Selman
1,660 Points
Carter Selman
Carter Selman
1,660 Points

Thank you! This helped a lot.