How to create function variables with parameter in extensions?

Question

When working with Swift - Extensions

As you know, we can create variables for function. i want to create a variable which can hold reference to a function which has parameters.

i have managed to create variable for a function which didn't have any parameters defined for

My code is as follows :-

extension UIAlertController {


    var cancelBlock : ()->Void  { return {} }

    var nameBlock : (nameArg:String?)->Void  { }

}

I am getting the following error with "nameBlock"

Computed property must have accessors specified

How should i specify return value ?

Answer 1

use
var nameBlock : (nameArg:String?)->Void? { return nil }