How to return an outer function inside an asynchronous inner function in swift?

Question

I am creating a swift class which contain of a function which validate if the user is true. However, the userVerifyResult will always return \"false\" even if t

Answer 1

Use completion handler, as Apple does in their frameworks:

func verifyUser(completionHandler: ((result: Bool)->())) {

then return the result via

        if(json["valid"]! == "true"){
            completionHandler(result: true)
        }else{
            completionHandler(result: false)
        }

then invoke it as

verifyUser { (result) -> () in
    println(result)
}

Answer 2

There is no way to block a NSURLSessionDataTask (that i know of) until you return the function, so its not possible to do it like that. You will have to have a callback in your tasks completion handler that will print the result or delegate the printing to another function