Why is my presentModalViewController not working from inside AppDelegate? - ios

Question

Why do I want to use presentModalViewController in AppDelegate?
- Processing didReceiveLocalNotification, so I can launch a seperate modalView on top of my app to process the notification
What does my view architecture look like?
- Using storyboards
- MainStoryBoard: ->TabBarController->NavigationController
What's happening?
- Nothing, that's the problem :-D
- When I press the action button from the UILocalNotification, the app opens, but just shows the last open view from the tabbarcontroller.
As you can see below my last effort was to present the modalViewController on top of that current view, like so:
[self.window.rootViewController.tabBarController.selectedViewController.navigationController presentModalViewController:navigationController animated:YES];
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification {
UIApplicationState state = [application applicationState];
if (state == UIApplicationStateInactive) {
// Application was in the background when notification was delivered.
NSLog(#"Received notification while in the background");
}
else {
NSLog(#"Received notification while running.");
}
MedicationReminderViewController *controller = [[UIStoryboard storyboardWithName:#"ModalStoryBoard" bundle:nil] instantiateViewControllerWithIdentifier:#"MedicationReminderVC"];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:controller];
[self.window.rootViewController.tabBarController.selectedViewController.navigationController presentModalViewController:navigationController animated:YES];
}
Update
Seems that this is nil:
self.window.rootViewController.tabBarController.selectedViewController.navigationController
Solution
[self.window.rootViewController presentModalViewController:navigationController animated:YES];

Answer 1

Try this :
[self.window.rootViewController presentModalViewController:controller
animated:YES];

Answer 2

Have you tried the following?
[self.window.rootViewController.tabBarController.selectedViewController presentModalViewController:navigationController animated:YES];
That said, even if this works, I would really urge you to reconsider your design choices to avoid having to do this. Traversing the navigation stack in this way to access stuff can get very messy and I'd strongly advise against it.