I have three layered TTLauncherViewControllers that I trigger using the url: "tt://launcher/{number}" ... the class then checks the number and based on that displays a different launcher v开发者_如何学Pythoniew. For instance from the home screen you can click "Team" and a new launcher view pops up with all the team members.

For some reason if I click something and go back and forth it gives me an EXC_BAD_ACCESS ... which I cannot figure out. Any ideas on why this may be?

Edit: Here is a stack trace:

4 0x93f2afda in __gnu_cxx::__verbose_terminate_handler

5 0x028e3333 in _objc_terminate

6 0x93f2917a in _cxxabiv1::_terminate

7 0x93f291ba in std::terminate

8 0x93f292b8 in __cxa_throw

9 0x028e3481 in objc_exception_throw

10 0x027956ab in -[NSObject(NSObject) doesNotRecognizeSelector:]

11 0x027052b6 in forwarding

12 0x02704e72 in forwarding_prep_0_

13 0x005e983f in -[UIViewController _containsFirstResponder]

14 0x005fa906 in -[UINavigationController navigationTransitionView:didStartTransition:]

15 0x0078023e in -[UINavigationTransitionView transition:fromView:toView:]

16 0x0077fbbf in -[UINavigationTransitionView transition:toView:]

17 0x005f3ccd in -[UINavigationController _startDeferredTransitionIfNeeded]

18 0x00710b55 in -[UILayoutContainerView layoutSubviews]

19 0x00154481 in -[CALayer layoutSublayers]

20 0x001541b1 in CALayerLayoutIfNeeded

21 0x0014d2e0 in CA::Context::commit_transaction

22 0x0014d040 in CA::Transaction::commit

23 0x0017debb in CA::Transaction::observer_callback

24 0x02774f4b in CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION

25 0x02709b27 in __CFRunLoopDoObservers

26 0x026d2ce7 in __CFRunLoopRun

27 0x026d2350 in CFRunLoopRunSpecific

28 0x026d2271 in CFRunLoopRunInMode

29 0x031b600c in GSEventRunModal

30 0x031b60d1 in GSEventRun

Looks like there's a memory leak somewhere, either in Three20 or in your code. Are you certain that you're retaining everything as you should be?