Fade-in / fade-out during an interface rotation

Question

When my iPhone interface rotates, I would like to do a fade-in/fade-out for a specific UIView of a UIViewController... Like...

- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.3];
    theView.alpha = 0;
    [UIView commitAnimations];
}

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{   
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.3];
    theView.alpha = 1;
    [UIView commitAnimations];  
}

But the animation doesn't finish before the rotation start (we can see the view starting to self-resize)...

Is there a way to delay rotation start ?

"duration" is the duration of the rotating animation, right ?

Answer 1

I found that running the current run loop for the same amount of time as the preceding animation, did in fact delay the rotation.

- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
    [UIView animateWithDuration:0.25 animations:^{
        theview.alpha = 0.0;
    }];

    [[NSRunLoop currentRunLoop] runUntilDate:[NSDate dateWithTimeIntervalSinceNow:0.25]];
}