Question

Is there a way to implement your own mechanism to detect when dismissModalViewControllerAnimated disappears? I’ve tried viewdiddisappear, but this is not being called as I think it only called when subview are removed from a view. With the case of modals, I think iOS treats them differently.

Any ideas?

I would like my delegate to do some action after this modal view has been dismissed.

Thanks.

Answer 1

Use NSNotificationCenter to post a notification before you dismiss the view controller. Add your other view controllers as observers. That’s an easy way to broadcast events.

So before you dismiss:

[[NSNotificationCenter defaultCenter] postNotificationName:@"DismissModalViewController" 
                                                    object:nil];

[self dismissModalViewControllerAnimated:YES];

And then in your view controllers

[[NSNotificationCenter defaultCenter] addObserver:self 
                                         selector:@selector(yourCallback)
                                             name:@"DismissModalViewController" 
                                           object:nil];

The callback would be something like:

- (void) yourCallback
{
    // some code to run when modal view controller is dismissed
}