ios - objective - uialertcontroller swift 4

Cómo agregar una acción a un botón de UIAlertView usando Swift iOS

Question

Quiero agregar otro botón que no sea el botón "Aceptar", que simplemente debería descartar la alerta. Quiero que el otro botón llame a cierta función.

var logInErrorAlert: UIAlertView = UIAlertView()
logInErrorAlert.title = "Ooops"
logInErrorAlert.message = "Unable to log in."
logInErrorAlert.addButtonWithTitle("Ok")

¿Cómo agrego otro botón a esta alerta y luego dejo que invoque una función una vez que hace clic, así que digamos que queremos que el nuevo botón llame?

 retry()

Answer 1

La forma más rápida es usar el nuevo UIAlertController y los cierres:

 // Create the alert controller
let alertController = UIAlertController(title: "Title", message: "Message", preferredStyle: .Alert)
// Create the actions
let okAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.Default) {
UIAlertAction in
NSLog("OK Pressed")
}
let cancelAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel) {
UIAlertAction in
NSLog("Cancel Pressed")
}
// Add the actions
alertController.addAction(okAction)
alertController.addAction(cancelAction)
// Present the controller
self.presentViewController(alertController, animated: true, completion: nil)

Swift 3:

 // Create the alert controller
let alertController = UIAlertController(title: "Title", message: "Message", preferredStyle: .alert)
// Create the actions
let okAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.default) {
UIAlertAction in
NSLog("OK Pressed")
}
let cancelAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.cancel) {
UIAlertAction in
NSLog("Cancel Pressed")
}
// Add the actions
alertController.addAction(okAction)
alertController.addAction(cancelAction)
// Present the controller
self.present(alertController, animated: true, completion: nil)

Answer 2

Ver mi código:

 @IBAction func foundclicked(sender: AnyObject) {
if (amountTF.text.isEmpty)
{
let alert = UIAlertView(title: "Oops! Empty Field", message: "Please enter the amount", delegate: nil, cancelButtonTitle: "OK")
alert.show()
}
else {
var alertController = UIAlertController(title: "Confirm Bid Amount", message: "Final Bid Amount : "+amountTF.text , preferredStyle: .Alert)
var okAction = UIAlertAction(title: "Confirm", style: UIAlertActionStyle.Default) {
UIAlertAction in
JHProgressHUD.sharedHUD.loaderColor = UIColor.redColor()
JHProgressHUD.sharedHUD.showInView(self.view, withHeader: "Amount registering" , andFooter: "Loading")
}
var cancelAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel) {
UIAlertAction in
alertController .removeFromParentViewController()
}
alertController.addAction(okAction)
alertController.addAction(cancelAction)
self.presentViewController(alertController, animated: true, completion: nil)
}
}

Answer 3

Versión Swift 3.0 de la respuesta de Jake

// Crea el controlador de alerta

let alertController = UIAlertController(title: "Alert!", message: "There is no items for the current user", preferredStyle: .alert)
// Create the actions
let okAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.default) {
UIAlertAction in
NSLog("OK Pressed")
}
let cancelAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.cancel) {
UIAlertAction in
NSLog("Cancel Pressed")
}
// Add the actions
alertController.addAction(okAction)
alertController.addAction(cancelAction)
// Present the controller
self.present(alertController, animated: true, completion: nil)

Answer 4

basado en veloz:

let alertCtr = UIAlertController(title:"Title", message:"Message", preferredStyle: .Alert)
let Cancel = AlertAction(title:"remove", style: .Default, handler: {(UIAlertAction) -> Void in })
let Remove = UIAlertAction(title:"remove", style: .Destructive, handler:{(UIAlertAction)-> Void
inself.colorLabel.hidden = true
})
alertCtr.addAction(Cancel)
alertCtr.addAction(Remove)
self.presentViewController(alertCtr, animated:true, completion:nil)}

Answer 5

UIAlertViews utiliza un delegado para comunicarse con usted, el cliente.

Agrega un segundo botón y crea un objeto para recibir los mensajes de delegado de la vista:

class LogInErrorDelegate : UIAlertViewDelegate {
init {}
// not sure of the prototype of this, you should look it up
func alertView(view :UIAlertView, clickedButtonAtIndex :Integer) -> Void {
switch clickedButtonAtIndex {
case 0:
userClickedOK() // er something
case 1:
userClickedRetry()
/* Don''t use "retry" as a function name, it''s a reserved word */
default:
userClickedRetry()
}
}
/* implement rest of the delegate */
}
logInErrorAlert.addButtonWithTitle("Retry")
var myErrorDelegate = LogInErrorDelegate()
logInErrorAlert.delegate = myErrorDelegate

Answer 6

Swift 4 actualización

 // Create the alert controller
let alertController = UIAlertController(title: "Title", message: "Message", preferredStyle: .alert)
// Create the actions
let okAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.default) {
UIAlertAction in
NSLog("OK Pressed")
}
let cancelAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.cancel) {
UIAlertAction in
NSLog("Cancel Pressed")
}
// Add the actions
alertController.addAction(okAction)
alertController.addAction(cancelAction)
// Present the controller
self.present(alertController, animated: true, completion: nil)

Answer 7

let alert = UIAlertController(title: "Alert", message: "My Alert for test", preferredStyle: UIAlertControllerStyle.alert)
alert.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.default, handler: {(action:UIAlertAction!) in
print("you have pressed the ok button")
}))
alert.addAction(UIAlertAction(title: "Cancel", style: UIAlertActionStyle.default, handler: nil))
self.present(alert, animated: true, completion: nil)