Timeout function after 10 seconds Swift/iOS

Question

I want to display a "Network Error" message if after 10 seconds of trying to connect, a login does not succeed.

How can I stop my login function after 10 seconds and show this error message?

I'm using AlamoFire.

I don't have the full implementation, but this is the skeleton of what I want my function to behave like:

func loginFunc() {

    /*Start 10 second timer, if in 10 seconds 
     loginFunc() is still running, break and show NetworkError*/


    <authentication code here>
}

Answer 1

Here is the solution for Swift 4

DispatchQueue.main.asyncAfter(deadline: .now() + 3) {
   // Excecute after 3 seconds
}

Answer 2

func delay(delay:Double, closure:()->()) {
    dispatch_after(
        dispatch_time( DISPATCH_TIME_NOW, Int64(delay * Double(NSEC_PER_SEC))), dispatch_get_main_queue(), closure)
}

func loginFunc() {

    delay(10.0){
        //time is up, show network error
        //return should break out of the function (not tested)
        return
    }

    //authentication code