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iOS Object-Oriented Swift Properties Getter and Setter Methods

I don`t know what is wrong with my code, maybe I didn`t understand the exercise, please could you explain me

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

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

2 Answers

Hi,

You can also customise the newValue variable to whatever you like if you want to be more explicit in your code for instance you can do this:

class Temperature {
  var celsius: Float = 0.0
  var fahrenheit: Float {
    get {
      return (celsius*1.8) + 32.0
    }
    set(newTempValue) {
      celsius = (newTempValue-32) / 1.8
    }
  }
}
Chris Shaw
Chris Shaw
26,676 Points

Hi Guilherme,

As Amit explained whenever we want to use a setter we can request the given value assigned to the property via newValue which is a special variable assigned only within setter's.

One other thing is you don't need self before celsius as it's already implied that it belongs to the Temperature class because there are no other variables called celsius within the setter.

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!