Navigation Controller - app crashes after 20 views pushed

I have an iPad app that has linear navigation with a Navi开发者_开发百科gation Controller. I am pushing View Controllers one at a time with gestures. I also have a PopOverController menu that can push View Controllers. Trouble is, when I push more than 20 it crashes.

Do I have to manually remove View Controllers from the stack after I get above a certain number? I was under the impression that the Navigation Controller would remove hidden View Controllers automatically.

Many thanks in advance.

---

If you're allocating too much memory use the viewDidUnload to release objects you won't use while the view is not presented again. You can restore then in the viewDidLoad as well.

---

Try releasing all the controllers after you push them onto the stack and also try releasing the navigation controller. Hope this helps