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iOS Object-Oriented Swift Properties Getter and Setter Methods

Nicolo Figiani
Nicolo Figiani
4,012 Points
Posted by Nicolo Figiani
Nicolo Figiani
4,012 Points

Can't figure out what is wrong with my code

The code I wrote to solve this challenge looks good to me. Despite this I get:

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

as a result.

Am i missing something? Someone can spot what is wrong with my answer?

Thanks..

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

1 Answer

Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points

The setter is called whenever fahrenheit is assigned a new value. instead of referencing fahrenheit in the setter, you need to reference the newValue:

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

alternatively, you can create a custom name for the newValue in the setter like so:

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

this makes it a bit more explicit than using the default newValue

Nicolo Figiani
Nicolo Figiani
4,012 Points
Nicolo Figiani
Nicolo Figiani
4,012 Points

You're absolutely right..I'll stick to the first implementation you suggested.

Thanks a lot..

Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points

no problem glad I could help