Passing functions as parameters in Swift

Question

I have the following function working as I expect, in iOS 8:

func showConfirmBox(msg:String, title:String,
    firstBtnStr:String,
    secondBtnStr:String,
    c         


        

Answer 1

Adding to got2jam's answer... If you're working with UIAlertController

The generic function to show an alert with closure:

func showAlertAction(title: String, message: String, actionClosure: @escaping () -> Void){
  let alertController = UIAlertController(title: title, message: message, preferredStyle: .alert)
  alertController.addAction(UIAlertAction(title: "Ok", style: UIAlertAction.Style.default, handler: {(action: UIAlertAction!) in actionClosure()}))
  self.present(alertController, animated: true, completion: nil)
}

Now you can call it like that:

showAlertAction(title: "This is the title", message: "This is the message") {
   self.close()
}

in this case, close is the particular UIAlertAction to execute

func close(){
  dismiss(animated: true, completion: nil)
}