UIActionSheet with swift

UIActionSheet is deprecated since iOS8, I would recommend using UIAlertController if you don't have to support version below:

private func presentSettingsActionSheet() {
  let settingsActionSheet: UIAlertController = UIAlertController(title:nil, message:nil, preferredStyle:UIAlertControllerStyle.ActionSheet)
  settingsActionSheet.addAction(UIAlertAction(title:"Send Feedback", style:UIAlertActionStyle.Default, handler:{ action in
    self.presentFeedbackForm()
  }))
  settingsActionSheet.addAction(UIAlertAction(title:"Tell Me a Joke!", style:UIAlertActionStyle.Default, handler:{ action in
    self.presentRandomJoke()
  }))
  settingsActionSheet.addAction(UIAlertAction(title:"Cancel", style:UIAlertActionStyle.Cancel, handler:nil))
  presentViewController(settingsActionSheet, animated:true, completion:nil)
}

Here is what it looks like presented:

                                     

You never set the action sheet's delegate:

myActionSheet = UIActionSheet()
myActionSheet.delegate = self

UIActionSheet in swift language :-

Action Sheet with cancelButton and destructiveButton

set the UIActionSheetDelegate.

        let actionSheet = UIActionSheet(title: "ActionSheet", delegate: self, cancelButtonTitle: "Cancel", destructiveButtonTitle: "Done")
        actionSheet.showInView(self.view)

Action Sheet with cancelButton , destructiveButton and otherButton

        let actionSheet = UIActionSheet(title: "ActionSheet", delegate: self, cancelButtonTitle: "Cancel", destructiveButtonTitle: "Done", otherButtonTitles: "Yes", "No")
        actionSheet.showInView(self.view)

create the Action sheet function

func actionSheet(actionSheet: UIActionSheet!, clickedButtonAtIndex buttonIndex: Int)
{
    switch buttonIndex{

    case 0:
        NSLog("Done");
        break;
    case 1:
        NSLog("Cancel");
        break;
    case 2:
        NSLog("Yes");
        break;
    case 3:
        NSLog("No");
        break;
    default:
        NSLog("Default");
        break;
        //Some code here..

 }