change return from shouldAutorotateToInterfaceOrie

Question

I'm using shouldAutorotateToInterfaceOrientation: for respond YES to all orientations.

At runtime, in few case, i must change the return to YES only in portrait.

But if i change this return type, and my device not physicly turn, my interface orientation not change. How can it's possible to force uiView to check the shouldAutorotateToInterfaceOrientation: and rotate the view without UIdevice rotation notification.

Thanks a lot.

Answer 1

Static method starting from IOS 5:
[UIViewController attemptRotationToDeviceOrientation];

Answer 2

Add this two lines of code:

    [[UIDevice currentDevice] endGeneratingDeviceOrientationNotifications];
    [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];