Swift 4 get Bool result from "perform" function call

I've got a function like this in Swift:

@objc func doSomeStuff(_ args: [String]) -> Bool {
    return true
}

And I have a selector name in String variable to execute. Here's my initial values:

let sel = Selector("doSomeStuff:")
let args = ["123123", "qweqweqwe"]

The problem is when I'm trying to receive the function calculation result like this:

let returnedValue = perform(sel, with: args)

Since that place I don't know how to get boolean value from returnedValue variable. Things I've already tried:

• to pass an inout Bool parameter to set it inside the function
• to pass an UnsafeMutablePointer<Bool> to set in function
• to get returnedValue.takeRetainedValue()

All of the above failed. So, how am I supposed handle this situation?

As you are using the ObjC runtime consider that you are dealing with objects. The ObjC signature is performSelector:withObject:

In Swift you have to return a reference type NSNumber instance rather than value type Bool

@objc func doSomeStuff(_ args: [String]) -> NSNumber  {
    return NSNumber(booleanLiteral: true)
}

and you have to dereference the pointer

let result = perform(sel, with: args)
let number = result!.takeUnretainedValue()