Get notifications when UIAlertView is displayed or dismissed, thats shown from another class

Question

I have a UIAlertView that being presented by another class(long story), I want to get notified when the UIAlertView is dismissed in current view.

Similar to this question How to observe when a UIAlertView is displayed?

The accepted answer: Say that class A creates the UIAlert and class B needs to observe it. Class A defines a notification. Class B registers for that notification. When Class A opens the alert it post the notification and class B will see it automatically sounds good,

Has anyone done something similar who could expand on this

Answer 1

You could create your own class MyAlertView that shows the alert normally but posts notifications for events like showing the view and being dismissed.

Just create a class with a simple interface like -showAlertWithTitle:

// Class interface
- (void)showAlertWithTitle:(NSString*)string
{
    [[UIAlertView alloc] initWithTitle:string message:nil delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil] show];
}

// UIAlertViewDelegate methods
- (void)didPresentAlertView:(UIAlertView *)alertView
{
    [[NSNotificationCenter defaultCenter] postNotificationName:@"MyAlertViewDidPresentAlert" object:nil];
}

- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
{
    [[NSNotificationCenter defaultCenter] postNotificationName:@"MyAlertViewDidDismissAlert" object:nil];
}

Something like that.

In the first viewController you would need this:

// First viewController
- (void)viewDidLoad
{
    [super viewDidLoad];

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didPresentAlert:) name:@"MyAlertViewDidPresentAlert" object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didDismissAlert:) name:@"MyAlertViewDidDismissAlert" object:nil];
}

- (void)didPresentAlert:(NSNotification*)notification
{...}

- (void)didDismissAlert:(NSNotification*)notification
{...}