Rotating UIViews become unresponsive

Question

I have a UIViewController subclass that changes its frame when the UI rotates (for example, most commonly, the frame is the same size and centered in both landscape and portrait.) When the view rotates, the view visually changes its frame as expected. But the controls (buttons, scroll views, etc.) that end up in the area of the new frame do not respond to touches. The only controls that respond are the ones that have remained in the original frame (so, if the view moves down and to the left, controls or parts of controls in the upper right corner remain responsive.) Any idea what's going on here?

Here's the code that changes the frame:

- (void) setLandscape:(bool)bLandscape {

    if( bLandscape )
        [self setFrame:m_landscapeFrame];
    else
        [self setFrame:m_portraitFrame];
}

And in the bigger view controller that handles rotation directly:

- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {

    bool bToLandscape= UIInterfaceOrientationIsLandscape(toInterfaceOrientation);

    [UIView beginAnimations:NULL context:nil];
    [UIView setAnimationDuration:duration];

    [m_pCurrentWindowViewController setLandscape:bToLandscape];

    // (Some unrelated stuff happens here...)

    [UIView commitAnimations];

}

To me this seems like a bug or at least poor design on Apple's part - there should never be a time when a view is in one position visually and another position in terms of control. But I'm just looking for a way to fix this behavior.

Answer 1

The simplest workaround I found was to update the frame in didRotateFromInterfaceOrientation after animating in willRotateToInterfaceOrientation.