example - ''UIAlertView'' quedó en desuso en iOS 9.0. Utilice UIAlertController con un estilo preferido de UIAlertControllerStyleAlert en su lugar

uialertcontroller swift 4

Question

He visto más respuestas, pero nada ayudó. Aquí está mi alerta y acción más antiguas para eso

override func viewWillAppear(animated: Bool) {
if Reachability.isConnectedToNetwork() == true {
print("internet connection ok")
} else
{
print("internet not ok")
let alertView: UIAlertView = UIAlertView(title: "Alert ", message: "connect to internet", delegate: self, cancelButtonTitle: "settings", otherButtonTitles: "cancel")
alertView.show()
return
}
}
func alertView(alertView: UIAlertView, clickedButtonAtIndex buttonIndex: Int)
{
if buttonIndex == 0 {
//This will open ios devices wifi settings
UIApplication.sharedApplication().openURL(NSURL(string: "prefs:root")!)
}
else if buttonIndex == 1
{
//TODO for cancel
exit(0)
}
}

En eso estoy recibiendo una advertencia:

''UIAlertView'' quedó en desuso en iOS 9.0. Utilice UIAlertController con un estilo preferido de UIAlertControllerStyleAlert en su lugar

Lo intenté :

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

Pero para agregar dos botones y agregar la ruta de índice de botón presionar enlace de método mi código anterior, no puedo hacer eso. Nada de acción ocurre desde mi botón uialert,

Por favor, ayúdenme, ¿Cómo puedo eliminar esas advertencias y recodificar mi Uialert con mi acción de dos botones?

Soy nuevo en rapidez. Su ayuda será útil. ¡Gracias!

Answer 1

En Swift 3 , puedes escribir esto:

let alertController = UIAlertController(title: "Title", message: "This is my text", preferredStyle: UIAlertControllerStyle.alert)
let okAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.default)
{
(result : UIAlertAction) -> Void in
print("You pressed OK")
}
alertController.addAction(okAction)
self.present(alertController, animated: true, completion: nil)

Answer 2

Este código ayudará

let alertController = UIAlertController(title: "Default AlertController", message: "A standard alert", preferredStyle: .Alert)
let cancelAction = UIAlertAction(title: "Cancel", style: .Cancel)
{
(action:UIAlertAction!) in
print("you have pressed the Cancel button");
}
alertController.addAction(cancelAction)
let OKAction = UIAlertAction(title: "OK", style: .Default)
{
(action:UIAlertAction!) in
print("you have pressed OK button");
}
alertController.addAction(OKAction)
self.presentViewController(alertController, animated: true, completion:nil)

Answer 3

Para un mensaje de alerta básico, me gusta usar una extensión en UIViewController:

extension UIViewController {
func alertMessageOk(title: String, message: String) {
let alert = UIAlertController(title: title, message: message, preferredStyle: UIAlertControllerStyle.alert)
let action = UIAlertAction(title: "Ok", style: .default, handler: nil)
alert.addAction(action)
present(alert, animated: true, completion: nil)
}
}

Uso: self.alertMessageOk(title: "Test Title", message: "Test message")

Answer 4

Prueba este código Ex

 let actionSheetController: UIAlertController = UIAlertController(title: "Are you sure?", message: "", preferredStyle: .Alert)
let cancelAction: UIAlertAction = UIAlertAction(title: "NO", style: .Cancel) { action -> Void in
//Do your task
}
actionSheetController.addAction(cancelAction)
let nextAction: UIAlertAction = UIAlertAction(title: "YES", style: .Default) { action -> Void in
//Do your task //NSUserDefaults.standardUserDefaults().removePersistentDomainForName(NSBundle.mainBundle().bundleIdentifier!)
// NSUserDefaults.standardUserDefaults().synchronize()
}
actionSheetController.addAction(nextAction)
self.presentViewController(actionSheetController, animated: true, completion: nil)

Answer 5

Tengo esta respuesta de este enlace, creo que es útil para ti

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

 var alertController = UIAlertController(title: "Title", message: "Message", preferredStyle: .Alert)
// Create the actions
var okAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.Default) {
UIAlertAction in
NSLog("OK Pressed")
}
var 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)

Answer 6

Vea este Código Destructivo y los botones OK en UIAlertController :

let alertController = UIAlertController(title: "Destructive", message: "Simple alertView demo with Destructive and Ok.", preferredStyle: UIAlertControllerStyle.alert) //Replace UIAlertControllerStyle.Alert by UIAlertControllerStyle.alert
let DestructiveAction = UIAlertAction(title: "Destructive", style: UIAlertActionStyle.Destructive) {
(result : UIAlertAction) -> Void in
print("Destructive")
}
// Replace UIAlertActionStyle.Default by UIAlertActionStyle.default
let okAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.default) {
(result : UIAlertAction) -> Void in
print("OK")
}
alertController.addAction(DestructiveAction)
alertController.addAction(okAction)
self.presentViewController(alertController, animated: true, completion: nil)

Swift 3:

let alertController = UIAlertController(title: "Destructive", message: "Simple alertView demo with Destructive and Ok.", preferredStyle: UIAlertControllerStyle.alert) //Replace UIAlertControllerStyle.Alert by UIAlertControllerStyle.alert
let DestructiveAction = UIAlertAction(title: "Destructive", style: UIAlertActionStyle.destructive) {
(result : UIAlertAction) -> Void in
print("Destructive")
}
// Replace UIAlertActionStyle.Default by UIAlertActionStyle.default
let okAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.default) {
(result : UIAlertAction) -> Void in
print("OK")
}
alertController.addAction(DestructiveAction)
alertController.addAction(okAction)
self.present(alertController, animated: true, completion: nil)

Ver alerta con botón destructivo y OK:

Answer 7

Swift 3

 // Create message
let alertController = UIAlertController(title: "Title",
message: "Message",
preferredStyle: .actionSheet)
// Clear Action
let clearAction = UIAlertAction(title: "Clear",
style: .destructive,
handler: { (action:UIAlertAction!) in
print ("clear")
})
alertController.addAction(clearAction)
// Cancel
let cancelAction = UIAlertAction(title: "Cancel",
style: .cancel,
handler: { (action:UIAlertAction!) in
print ("Cancel")
})
alertController.addAction(cancelAction)
// Present Alert
self.present(alertController,
animated: true,
completion:nil)

Answer 8

 UIAlertController *AC = UIAlertController.alertControllerWithTitle("Title",message:"Message",preferredStyle:UIAlertControllerStyleAlert)
UIAlertAction *ActionOne = [UIAlertAction actionWithTitle:"ActionOne" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) { NSLog("ActionOne")
} ]
UIAlertAction *ActionTwo = [UIAlertAction actionWithTitle:"ActionTwo" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) { NSLog("ActionTwo")
} ]
AC.addAction(ActionOne)
AC.addAction(ActionTwo)
self.presentViewController(AC,animated:true,completion:nil)