Swift alert view with OK and Cancel which button tapped

Question

I have an alert view in Xcode written in Swift and I d like to determine which button the user selected  it is a confirmation dialog  to do nothing or to execute something   Currently I have    IBAction func pushedRefresh sender  AnyObject        var refreshAlert   UIAlertView       refreshAlert title    Refresh       refreshAlert message    All data will be lost       refreshAlert addButtonWithTitle  Cancel       refreshAlert addButtonWithTitle  OK       refreshAlert show       I m probably using the buttons wrong  please do correct me since this is all new for me

User · Answer

You can easily do this by using UIAlertController

let alertController = UIAlertController(
       title: "Your title", message: "Your message", preferredStyle: .alert)
let defaultAction = UIAlertAction(
       title: "Close Alert", style: .default, handler: nil)
//you can add custom actions as well 
alertController.addAction(defaultAction)

present(alertController, animated: true, completion: nil)

.

Reference: iOS Show Alert

User · Answer

small update for swift 5  let refreshAlert   UIAlertController title   quot Refresh quot   message   quot All data will be lost  quot   preferredStyle  UIAlertController Style alert       refreshAlert addAction UIAlertAction title   quot Ok quot   style   default  handler     action  UIAlertAction   in           print  quot Handle Ok logic here quot                refreshAlert addAction UIAlertAction title   quot Cancel quot   style   cancel  handler     action  UIAlertAction   in           print  quot Handle Cancel Logic here quot                self present refreshAlert  animated  true  completion  nil

User · Answer

You may want to consider using SCLAlertView  alternative for UIAlertView or UIAlertController   UIAlertController only works on iOS 8 x or above  SCLAlertView is a good option to support older version   github to see the details  example   let alertView   SCLAlertView   alertView addButton  First Button   target self  selector Selector  firstButton    alertView addButton  Second Button         print  Second button tapped     alertView showSuccess  Button View   subTitle   This alert view has buttons

User · Answer

Updated for swift 3       function defination    IBAction func showAlertDialog   sender  UIButton               Declare Alert         let dialogMessage   UIAlertController title   Confirm   message   Are you sure you want to Logout    preferredStyle   alert              Create OK button with action handler         let ok   UIAlertAction title   OK   style   default  handler     action  - gt  Void in              print  Ok button click                   self logoutFun                          Create Cancel button with action handlder         let cancel   UIAlertAction title   Cancel   style   cancel     action  - gt  Void in             print  Cancel button click                           Add OK and Cancel button to dialog message         dialogMessage addAction ok          dialogMessage addAction cancel              Present dialog message to user         self present dialogMessage  animated  true  completion  nil             logoutFun   function definaiton     func logoutFun         print  Logout Successfully

User · Answer

var refreshAlert   UIAlertController title   Log Out   message   Are You Sure to Log Out      preferredStyle  UIAlertControllerStyle Alert   refreshAlert addAction UIAlertAction title   Confirm   style   Default  handler     action  UIAlertAction   in     self navigationController  popToRootViewControllerAnimated true       refreshAlert addAction UIAlertAction title   Cancel   style   Default  handler     action  UIAlertAction   in      refreshAlert  dismissViewControllerAnimated true  completion  nil         presentViewController refreshAlert  animated  true  completion  nil

User · Answer

If you are using iOS8  you should be using UIAlertController     UIAlertView is deprecated  Here is an example of how to use it  var refreshAlert   UIAlertController title   quot Refresh quot   message   quot All data will be lost  quot   preferredStyle  UIAlertControllerStyle Alert   refreshAlert addAction UIAlertAction title   quot Ok quot   style   Default  handler     action  UIAlertAction   in   print  quot Handle Ok logic here quot          refreshAlert addAction UIAlertAction title   quot Cancel quot   style   Cancel  handler     action  UIAlertAction   in   print  quot Handle Cancel Logic here quot          presentViewController refreshAlert  animated  true  completion  nil   As you can see the block handlers for the UIAlertAction handle the button presses   A great tutorial is here  although this tutorial is not written using swift   http   hayageek com uialertcontroller-example-ios  Swift 3 update  let refreshAlert   UIAlertController title   quot Refresh quot   message   quot All data will be lost  quot   preferredStyle  UIAlertControllerStyle alert   refreshAlert addAction UIAlertAction title   quot Ok quot   style   default  handler     action  UIAlertAction   in     print  quot Handle Ok logic here quot        refreshAlert addAction UIAlertAction title   quot Cancel quot   style   cancel  handler     action  UIAlertAction   in     print  quot Handle Cancel Logic here quot        present refreshAlert  animated  true  completion  nil   Swift 5 update  let refreshAlert   UIAlertController title   quot Refresh quot   message   quot All data will be lost  quot   preferredStyle  UIAlertControllerStyle alert   refreshAlert addAction UIAlertAction title   quot Ok quot   style   default  handler     action  UIAlertAction   in       print  quot Handle Ok logic here quot        refreshAlert addAction UIAlertAction title   quot Cancel quot   style   cancel  handler     action  UIAlertAction   in       print  quot Handle Cancel Logic here quot        present refreshAlert  animated  true  completion  nil   Swift 5 3 update  let refreshAlert   UIAlertController title   quot Refresh quot   message   quot All data will be lost  quot   preferredStyle  UIAlertController Style alert   refreshAlert addAction UIAlertAction title   quot Ok quot   style   default  handler     action  UIAlertAction   in       print  quot Handle Ok logic here quot        refreshAlert addAction UIAlertAction title   quot Cancel quot   style   cancel  handler     action  UIAlertAction   in       print  quot Handle Cancel Logic here quot        present refreshAlert  animated  true  completion  nil

[xcode] Swift alert view with OK and Cancel: which button tapped?

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