Swift Programming: getter/setter in stored property

Question

How do I overwrite the setter of stored property in Swift?

In Obj-C, I can overwrite its setter, but Swift doesn\'t seem to be happy about getter/setters being used

Answer 1

If you don't want to use didSet, which has the problem that the property's value is temporarily wrong, you should wrap a computed property around it.

private var _foo:Int = 0
var foo:Int {
    get {
        return _foo
    }
    set {
        if(newValue > 999) {
            _foo = 999
        } else {
            _foo = newValue
        }
    }
}

Or:

private var _foo:Int = 0
var foo:Int {
    get {
        return _foo
    }
    set {
        guard newValue <= 999 else {
            _foo = 999
            return
        }
        _foo = newValue
    }
}