setter method doesn't work... Why?

Question

In the course Object-Oriented Swift, in the Properties section, in regards to the getter and setter methods challenge... This doesn't work, why?
```swift   
 class Temperature {
        var celsius: Float = 0.0
        var fahrenheit: Float {
          get {
            return (celsius * 1.8) + 32.0
          }
          set {
            fahrenheit = newValue
            celsius = (fahrenheit - 32.0) / 1.8
          }
        }    
    }
```
Checking the work button only gives me the reply, "Bummer! Try again"... Not very helpful
Temperature.swift
class Temperature {
    var celsius: Float = 0.0
    var fahrenheit: Float {
        return (celsius * 1.8) + 32.0
    }    
}

Francisco Navarro · Accepted Answer

Hi Misho!
As Amit says during the course, computed properties do not actually store a value, instead and in this case fahrenheit provides a getter and a setter to retrieve other properties values indirectly, so you can't use:         
fahrenheit = newValue
Instead, use directly the "newValue" in the formula:
set {
        celsius = (newValue - 32.0) / 1.8
}
Hope that helps

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Misho Milicevic

Misho Milicevic

setter method doesn't work... Why?

1 Answer

Francisco Navarro

Francisco Navarro

Misho Milicevic

Misho Milicevic