How to animate rotation of MPMoviePlayerController? - objective-c

Question

I'm making a video player for iPad and I'm having some trouble animating the rotation properly. Usually I deal with rotation by setting the auto rotation mask, but since I'm working with a video player I want to preserve the aspect ratio and I'm not sure how I would do that with auto rotation mask.
I did a quick and dirty solution without animation just to get the correct behavior:
- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{
moviePlayer.view.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.width*0.75);
}
It works correctly, but it's not pretty. I'm currently preparing the app for a demo, so now working correctly isn't enough, it has to be pretty.
I tried the following and I think you can guess why it doesn't work:
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
[UIView animateWithDuration:duration animations:^{
moviePlayer.view.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.width*0.75);
}];
}
That's right, self.view.frame hasn't been updated yet.
Any advice on how to deal with this, without hard coded frames?

Answer 1

There may be a cleaner way to do this, but I calculate what the new frame should be using the current one, and the new orientation:
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
CGSize size = self.view.frame.size;
CGRect newRect;
if (toInterfaceOrientation == UIInterfaceOrientationPortrait || toInterfaceOrientation == UIInterfaceOrientationPortraitUpsideDown) {
newRect = CGRectMake(0, 0, MIN(size.width, size.height), MAX(size.width, size.height));
} else {
newRect = CGRectMake(0, 0, MAX(size.width, size.height), MIN(size.width, size.height));
}
[UIView animateWithDuration:duration animations:^{
player.view.frame = newRect;
}];
}