UIAlertViewDelegate clickedButtonAtIndex is never called?

Question

Here is the controller I implemented for running on iOS7:

import UIKit


@objc(StartViewController)
class StartViewController: UIViewController, UIAlertViewDelegate {

  override func viewDidLoad() {
    super.viewDidLoad()

    // Do any additional setup after loading the view.

  }



  override func viewDidAppear(animated: Bool) {

    let confirm:UIAlertView = UIAlertView(title: "sdfsdf", message: "sfsff3333", delegate: self, cancelButtonTitle: "cancel")
    confirm.alertViewStyle = UIAlertViewStyle.Default
    confirm.show()
  }


  // MARK: UIAlertViewDelegate


  func alertView(alertView: UIAlertView, clickedButtonAtIndex buttonIndex: Int) {
    println("buttonIndex: "+buttonIndex)
  }

  func alertViewCancel(alertView: UIAlertView) {
    println("cancel")

  }
}

It turns out that none of the functions from UIAlertViewDelegate is ever called even if I set the delegate correctly to self.

When I click on one of the buttons in the alert dialog I got the following output in the console:

0x796d4984

What do I have to do to make the UIAlertViewDelegate methods being called?

Edit: I also did:

confirm.delegate = self

This does not help.

Using your code only, I can see 'buttonIndex' output! Strange! — Sohil R. Memon, Apr 22 '15 at 11:31
check this link plz http://stackoverflow.com/questions/24022479/how-would-i-create-a-uialertview-in-swift — aBilal17, Apr 22 '15 at 11:32
As @SohilR.Memon, if I run your code I can see 'buttonIndex' output — lihudi, Apr 22 '15 at 11:42

score 0 · Answer 1 · answered Apr 22 '15 at 11:33

0

When you're making the alertView, do confirm.delegate = self (assuming confirm is your UIAlertView.

answered Apr 22 '15 at 11:33

Schemetrical

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I did this. Does not help. – Michael Apr 22 '15 at 11:34
@confile very odd. Try making a new project, or doing a clean build? – Schemetrical Apr 22 '15 at 11:36

score 0 · Answer 2 · answered Apr 22 '15 at 11:44

0

The problem was this line: println("buttonIndex: "+buttonIndex)

It must be like this:

println("buttonIndex: \(buttonIndex)")

answered Apr 22 '15 at 11:44

Michael

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1

In the question you say that the method is never called, this could be tracked with breakpoints. – Vinay Jain Apr 22 '15 at 11:54

score 0 · Answer 3 · answered Apr 22 '15 at 12:20

Try, doing this. I think, the reason is you haven't assigned the delegate to self(your controller).

override func viewDidAppear(animated: Bool) {

    let confirm:UIAlertView = UIAlertView(title: "sdfsdf", message: "sfsff3333", delegate: self, cancelButtonTitle: "cancel")
    confirm.delegate=self;
    confirm.alertViewStyle = UIAlertViewStyle.Default
    confirm.show()
  }

score 0 · Answer 4 · answered Apr 22 '15 at 12:29

you should try UIAlertController for iOS 8 and UIAlertView for iOS 7. Do something like this:

if(SYSTEM_VERSION_LESS_THAN(@"8.0"))
{
  alert = [[UIAlertView alloc] initWithTitle:@"aa" message:@"asdadad"  delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [alert show];
}
    else
   {
    UIAlertController *alertController = [UIAlertController    alertControllerWithTitle:@"aca" message:@"asdfaf" preferredStyle:UIAlertControllerStyleAlert];


    UIAlertAction *okAction = [UIAlertAction
                               actionWithTitle:NSLocalizedString(@"OK", @"OK action")
                               style:UIAlertActionStyleDefault
                               handler:^(UIAlertAction *action)
                               {

                               }];

    [alertController addAction:okAction];

    [self presentViewController:alertController animated:YES completion:nil];
}

UIAlertViewDelegate clickedButtonAtIndex is never called?

4 Answers4