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iOS Object-Oriented Swift Properties Getter and Setter Methods

Jordi van der Hek
Jordi van der Hek
13,384 Points

OOP Swift getter/setter

hi!

having trouble here with the get and set methods

question:

We need to add getter and setter methods to the fahrenheit property of the Temperature class. Add a getter method to the access the value of the fahrenheit property. Then add a setter method. When the user assigns a value to the fahrenheit property, the setter method will calculate and assign a value to the celsius property. (Note: Celsius = (Fahrenheit-32)/1.8))

error: Bummer! The setter method for fahrenheit did not assign the right value to the celsius property. (Note: Celsius = (Fahrenheit-32)/1.8)

Am I missing something?

Temperature.swift
class Temperature {
    var celsius: Float = 0.0
    var fahrenheit: Float {
      get {
        return (celsius * 1.8) + 32.0
      }
      set {
        celsius = (fahrenheit-32)/1.8
      }
    }
}

1 Answer

Chris Shaw
Chris Shaw
26,676 Points

Hi Jordi,

As Amit explained in the previous video, setters have a special variable scoped within them called newValue, For this challenge we need to use this in the place of fahrenheit so we can convert the given value.

class Temperature {
  var celsius: Float = 0.0
  var fahrenheit: Float {
    get {
      return (celsius * 1.8) + 32.0
    }
    set {
      celsius = (newValue - 32) / 1.8
    }
  }
}

Happy coding!