uiviewanimation works in ios 7 but gets clipped and offset in ios6 - ios

Question

working on moving my app to IOS7, but i'm having a uiviewanimation problem.
Everything works fine in IOS7, but when i use uiviewanimation to "flip" between two views, the view looks wrong during the transition, but fine after. It's higher up, and a part of the bottom of the view is clipped. See attached picture.
When the animation completes, the view "jumps" down to its correct position. I'm at a loss...
the code i use to flip my view is:
newView = [[LocationCrudViewController alloc] initWithNibName:THE_VIEW bundle:nil];
.....
[UIView transitionWithView:self.window duration:0.5
options:UIViewAnimationOptionTransitionFlipFromRight
animations:^ { self.window.rootViewController = newView; }
completion:nil];
Point worth noting - i used to do:
self.window addSubview:currentViewController.view];
as the view animation, and that worked, however i then got the warning message that Application windows are expected to have a root view controller at the end of application launch so i switched to the above code which, again, works fine in IOS7.
I'm reeeaaally hoping someone can help out here.

Answer 1

For those interested, here's what i ended up doing:
My views are defined as per normal (for me), no ios6/7 deltas are needed, in a nib with associated controllers.
I have created a "dummy" view, which takes up the entire screen but has no content.
In my application delegate, i create my dummy view and set it as root:
self.root = [[RootViewController alloc] initWithNibName:ROOT_VIEW_CONTROLLER bundle:nil];
self.window.rootViewController = root;
I can then add and remove subviews as i see fit, like this:
[currentViewController.view removeFromSuperview];
UIView transitionWithView:self.window duration:0.5
options:UIViewAnimationOptionTransitionFlipFromRight
animations:^ {
[self.window addSubview:newViewController.view]; }
completion:nil];
This works great, and it makes my views go under the status bar in both IOS6 and IOS7, just as i want.
Hope this helps somebody.