How to add an action to a UIAlertView button using Swift iOS

Question

I want to add another button other than the  OK  button which should just dismiss the alert  I want the other button to call a certain function   var logInErrorAlert  UIAlertView   UIAlertView   logInErrorAlert title    Ooops  logInErrorAlert message    Unable to log in   logInErrorAlert addButtonWithTitle  Ok     How do I add another button to this alert  and then allow it to call a function once clicks so lets say we want the new button to call    retry

User · Accepted Answer

The Swifty way is to use the new UIAlertController and closures:

    // 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)

User · Answer

UIAlertViews use a delegate to communicate with you  the client   You add a second button  and you create an object to receive the delegate messages from the view   class LogInErrorDelegate   UIAlertViewDelegate        init            not sure of the prototype of this  you should look it up     func alertView view  UIAlertView  clickedButtonAtIndex  Integer  - gt  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

User · Answer

func showAlertAction title  String  message  String       let alert   UIAlertController title  title  message  message  preferredStyle  UIAlertController Style alert      alert addAction UIAlertAction title   Ok   style  UIAlertAction Style default  handler    action UIAlertAction   in         print  Action               alert addAction UIAlertAction title   Cancel   style  UIAlertAction Style default  handler  nil       self present alert  animated  true  completion  nil

User · Answer

this is for swift 4 2  5 and 5   let alert   UIAlertController title   ooops    message   Unable to login   preferredStyle   alert   alert addAction UIAlertAction title   Ok   style   default  handler  nil    self present alert  animated  true

User · Answer

See my code     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

User · Answer

Swift 4 Update             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

User · Answer

based on swift   let alertCtr   UIAlertController title  Title   message  Message   preferredStyle   Alert  let Cancel   AlertAction title  remove   style   Default  handler    UIAlertAction  - gt  Void in    let Remove   UIAlertAction title  remove   style   Destructive  handler   UIAlertAction - gt  Void      inself colorLabel hidden   true        alertCtr addAction Cancel  alertCtr addAction Remove   self presentViewController alertCtr  animated true  completion nil

User · Answer

Swift 3 0 Version of Jake s Answer     Create the alert controller  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

[ios] How to add an action to a UIAlertView button using Swift iOS

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