Computing UIVIews new width before rotation

Question

I'd like to know the new width my UIViewControllers view will have after a rotation change, but I need this information already in the

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

method, so I can not access the frame or bounds property.

I tried using the layer properties presentationLayer and modelLayer, but did not found the correct solution.

Would be great if somebody know the solution or can give some food of thought.

Answer 1

I found the problem!

The method I used was called to early:

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

Instead I know use this:

- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation duration:(NSTimeInterval)duration
{
    CGRect frame = [self.view.window convertRect:self.view.frame fromView:self.view];
    float newWidth = frame.size.width;

    // Doing my animation stuff...
}

This allows me to have the correct new width and animate my views properly.