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iOS Object-Oriented Swift Properties Getter and Setter Methods

Posted by Christopher Meyers
Christopher Meyers
Courses Plus Student 3,706 Points

There is a typo in this question. Too many ")" at the end.

There is a typo in this question, there are too many ")" at the end:

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))

* I changed the description to remove the content that was automatically posted with the actual part of the question that contains the typo. Apologies for the confusion.

Srinivasan Senthil
Srinivasan Senthil
2,266 Points
Srinivasan Senthil
Srinivasan Senthil
2,266 Points

2 brackets for Class. 2 brackets for the computed property 2 brackets for Getter method 2 brackets for Setter method.

The code should be corrected: class Temperature { var celsius: Float = 0.0 var fahrenheit: Float {

    get{
    return (celsius * 1.8) + 32.0
}
    set {
        celsius = newValue - 32 / 1.8
    }  
    }
}

Instead of using "return (Fahrenheit-32)/1.8", please use "celsius = newValue - 32 / 1.8" OR " return celsius = newValue - 32 / 1.8"

The place you got confused is:

  1. Computed property has 2 brackets. Getter is part of a computed property so it should have two brackets. total 4.

  2. Getter method is only to get the value. You cannot assign a new value to that variable. So to assign it with some other variable, you will have to use "newValue".

In your example, you used the get method to get the value of Fahrenheit. To calculate Celsius, you would need to subtract the Fahrenheit with 32 and divide by 1.8. So you to pass the Fahrenheit value you will have to use the keyword "newValue".

Hope this helps.

Christopher Meyers
Christopher Meyers
Courses Plus Student 3,706 Points

Thanks Srinivasan. But the content you saw was automatically posted in by the system. The actual issue I was referring to occurs in the question's description.