uialertview - iPhone: detecting if a UIAlert/UIActionSheet are open

Question

In my iOS application, I have a timer firing up, and when it fires, I need to be able to detect whether there's an Alert (UIAlertView) or an Action Sheet (UIActionSheet) open.

One way would be to modify the code presenting the alerts/actionsheets - but unfortunately this is not an option in my case.

So, the question is - is there a way of knowing/detecting whether an alert or action sheet have been opened?

Is there any notifications sent upon opening, or any traversal of the view hierarchy to detect it?

Thanks

Answer 1

They do send an alert when they open, but only to their delegate -- Check this question for a nice approach to that problem. Techzen recommends setting a boolean flag to YES when you open up the alert, and setting it back to NO when you dismiss the alert.

EDIT:

Since you don't have access at all to the code, why not try this clunky piece of code:

-(BOOL) doesAlertViewExist {
  for (UIWindow* window in [UIApplication sharedApplication].windows) {
    NSArray* subviews = window.subviews;
    if ([subviews count] > 0) {

      BOOL alert = [[subviews objectAtIndex:0] isKindOfClass:[UIAlertView class]];
      BOOL action = [[subviews objectAtIndex:0] isKindOfClass:[UIActionSheet class]];

      if (alert || action)
        return YES;
     }
  }
  return NO;
}