Resizing an iOS view with Xamarin.iOS when call status bar is toggled

Resizing an iOS view with Xamarin.iOS when call status bar is toggled

Is there a trick to detecting when the status bar changes height due to a
phone call in Xamarin.iOS?
I'm trying to adapt the excellent instructions from this post to work in
Xamarin, and the ChangedStatusBarFrame method is never called.
The following code doesn't do anything in a brand new Xamarin iPhone project:
public virtual void ChangedStatusBarFrame(UIApplication application,
RectangleF oldStatusBarFrame)
{
Debug.WriteLine("Y U NO work!");
}
I tried the equivalent in a new native iPhone app and it worked perfectly:
- (void)application:(UIApplication *)application
didChangeStatusBarFrame:(CGRect)oldStatusBarFrame
{
NSLog(@"Hey, the status bar changed size!");
}
I'm testing this on the iOS simulator by toggling the status bar.
I'm using Xamarin.iOS version 6.4.3.0 and XCode 4.6.3.
Any suggestions?