How to perform class nil checks

Question

I have a class in Swift:

class myClass {
    var theBool : Bool

    init(theBool: Bool) {
        self.theBool = theBool
    }

    init() {
        self.theBool = false
    }

}

Elsewhere in my code, I have this check:

classist  = myClass()

if let daBool = someRandomBool {
    classist.theBool = daBool
}

I want to know where to insert this check into the Class.

Are you saying that you'd like a method that takes an Optional and sets it only if it's non-nil? — creeperspeak, Dec 10 '19 at 21:23
@Wizard Basic questions are welcome, but only if accompanied with some kind of evidence that suggests that OP tried to do their own background research before posting. — Alexander, Dec 10 '19 at 21:40

vadian · Accepted Answer · 2019-12-10T21:34:33.953

Simple solution: Declare the (required) init method with an optional parameter type and perform the check there

class MyClass {
    var theBool : Bool

    init(bool: Bool?) {
        self.theBool = bool ?? false
    }
}

let someRandomBool : Bool? = true
let classist = MyClass(bool: someRandomBool)

or – a bit different but still simpler – with a struct

struct MyStruct {
    var theBool : Bool
}

let someRandomBool : Bool? = true
let classist = MyStruct(theBool: someRandomBool ?? false)

How to perform class nil checks

1 Answers1