Augmented reality iPhone with ARToolKit, Pb with UIImagePickerController and UINavigationController

I am currently working on an app with augmented reality. I chose to use the ARToolKit library (available on github). I have a little problem to integrate my view in my project. The problem is that I can not see my navigationbar when UIImagePickerController is launched

AugmentedRealityController.m

- (Void) displayAr
[RootViewController presentModalViewController: [self cameraController] animated: NO];
[DisplayView setFrames: [[[self cameraController] view] bounds]];

)

I guess the problem come from here. I can not view the UIImagePickerController that if I go through presentModalViewController. By making a pushviewcontroller from my navigation controller it does not work either (after read documentatio开发者_如何学编程n). After some research on documentation should be implemented by the delegate access UIImagePickerController and UINavigationController. Even with that it does not work either (sniff).

I picked this version here: http://github.com/nielswh/iPhone-AR-Toolkit/commit/681165d383ab590d03a0daaf761bc25b59d1acd6

I adapted a few things so that his running iOS 4.1 (actually this version is 3.1.3).

I do not know if there have been changes regarding the use of UIImagePickerController since.

If anyone has an idea, help or something. After half a day searching the internet I try many things in vain