Swift implement setter without getter

Question

How do you implement setter without getter in Swift? I need to call a method when the value is set:

var selectedIndex : Int{
    set {
        selectItemAtIndex(newValue)
    }
}

but in Swift, you are required to use both getter and setter, not just one.

Answer 1

You can use the property observer didSet. This will be called immediately after setting the value.

var selectedIndex: Int {
  didSet {
    selectItemAtIndex(selectedIndex)
  }
}