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iOS Object-Oriented Swift Properties Computed Properties

Djalma Barbieri
Djalma Barbieri
2,331 Points
Posted by Djalma Barbieri
Djalma Barbieri
2,331 Points

temperature

Hello, I did this code in Xcode, and it works, but I have a "Bummer!" in the compilation and no errors on preview. Can you help me ?

class Temperature { var celsius: Float = 0.0

init (celsius: Float) {
    self.celsius = celsius
}

}

class Fahrenheit : Temperature { var fahrenheit : Float = 0.0

init (celsius: Float, fahrenheit: Float){
     self.fahrenheit = fahrenheit
     super.init(celsius: celsius)
   }

    func Fahrenheit (celsius: Float) -> Float  {
        return ((celsius * 1.8) + 32)
    }

}

Temperature.swift 
class Temperature {
    var celsius: Float = 0.0

    init (celsius: Float) {
        self.celsius = celsius
    }
}

class Fahrenheit : Temperature {
    var fahrenheit : Float = 0.0

    init (celsius: Float, fahrenheit: Float){
         self.fahrenheit = fahrenheit
         super.init(celsius: celsius)
       }

        func Fahrenheit (celsius: Float) -> Float  {
            return ((celsius * 1.8) + 32)
        }

}
Anneke Keller
Anneke Keller
5,667 Points
Anneke Keller
Anneke Keller
5,667 Points

I think it should be solved like this:

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

1 Answer

Brendan Whiting
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Brendan Whiting
Front End Web Development Techdegree Graduate 84,735 Points
Brendan Whiting
.a{fill-rule:evenodd;}techdegree seal-36
Brendan Whiting
Front End Web Development Techdegree Graduate 84,735 Points

The "bummer" is misleading. It's not a bug you're just not doing the assignment as it wants. They want you to create a property within the temperature class which will be a computed property. It's a lot simpler than you think. Try something like this:

class Temperature {
    var celsius: Float = 0.0
    var fahrenheit: Float {
        return ((celsius * 1.8) + 32)
    }

}