Question

I have this method in my MainViewController:

-(void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
    NSLog(@"MAIN CONTAINER WILL ANIMATE");
    [super willAnimateRotationToInterfaceOrientation:toInterfaceOrientation duration:duration];
}

And when I rotate, the NSLog shows up, and everything is perfect. However, if I present a modalViewController from my MainViewController, and then I rotate, the NSLog no longer appears, and my MainViewController never knows that the device got rotated, so when the modalView is dismissed, the interface is not adjusted for the rotation.

Any ideas as to why a modal view can prevent the parent from receiving rotation updates? Is this typical, or must there be something wrong with my setup?

And just to make sure, I tried presenting the modalViewController as a subview via [mainViewController.view addSubview:modalView.view], and the rotation updates took effect properly. It’s only when I do [mainViewController presentModalViewController:modalViewController]; that the updates don’t take effect.

Answer 1

Surely when a view controller is being presented modally, no other view controllers receive any messages at all. That is what modal means in this context.

The obvious solution would be to check the orientation in the viewWillAppear method of your modeless view controller.