If is deprecated, how can I make my Alert button to do an action?

Question

We used to use UIAlertViewDelegate in ViewController.h to make our custom Alert button to do an action, like pressing the Play Again button in the alert window makes the game restart.

How do we do this with UIAlertController, the replacement class for UIAlertView?

I read this document bellow provided by Apple and didn't see a delegate method mentioned. Does it mean we don't do that anymore?

https://developer.apple.com/reference/uikit/uialertcontroller

have a loot at this http://stackoverflow.com/a/38703189/2522603 — ChenSmile, Sep 18 '16 at 16:17

score 2 · Accepted Answer · answered Sep 18 '16 at 16:19

First add UIAlertController
Then Add UIAlertAction
Then add that action to your alert controller.

like below.

UIAlertController *myalert = [UIAlertController alertControllerWithTitle:@"your title" message:@"your messate" preferredStyle:UIAlertControllerStyleAlert];

    UIAlertAction *myaction = [UIAlertAction actionWithTitle:@"you title" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        //your action here
    }];


    [myalert addAction:myaction];
    [self presentViewController:myalert animated:YES completion:nil];

"//your action here" part is especially made the point for me. Thank you! — Janmira, Sep 22 '16 at 18:59

score 0 · Answer 2 · answered Sep 18 '16 at 17:06

As it sounds like you found out, UIAlertView is deprecated (beginning in iOS 8), and so is UIAlertViewDelegate.

You're supposed to use UIAlertController instead. UIAlertController uses a different method for handling user taps on buttons. In UIAlertController you add UIAlertAction objects to your alert controller.

A UIAlertAction takes a block of code that gets called when the user triggers that action. Instead of setting up a delegate that listens for messages in a protocol, you pass a handler block (closure) to each button action that you set up. It's a different way of solving the same problem.

@AnuradhS gave sample code showing hot to set it up.

If is deprecated, how can I make my Alert button to do an action?

2 Answers2