Question

I have a UIViewcontroller that I want to push onto a UINavigationController, which in turn would push onto a modal view using presentModalViewController:animated.

Here’s my code:

TargetViewController *targetViewController = [[[TargetViewController alloc] init] autorelease];
UINavigationController *targetNavController = [[[UINavigationController alloc] initWithRootViewController:targetViewController] autorelease];
[self presentModalViewController:targetNavController animated:YES];

When code is run, the modal view loads as expected, but after dismissModalViewControllerAnimated: is called, the modal view slides down and the app crashes.

I get the following error in gdb:
-[CALayer retain]: message sent to deallocated instance

First part of question: is there anything inherently wrong with the above code?

Second part: if there is nothing wrong with above code, where should I look next to debug?

Additional info:
When I don’t release or autorelease the navController, it works fine. But Instruments will show abandoned memory, which I can only assume is the navController not being released. Maybe the modal view controller

P.S. I know that the crash is related to the memory management of the above ViewController, navController and modal view, because my code was working prior to messing with this code.

Answer 1

Fixed the issue. I was releasing the VC, causing the crash. Thanks for the input.