Workaround for dismissViewControllerAnimated failing to animate a stack of modal view controllers

gistfile1.m

- (void)loginViewControllerDidClose:(DSLoginViewController *)loginViewController
{
    // HACK
    //
    // Work around a bug(?) where the login VC's view disappears immediately
    // (without animation) before our own view then animates away. We want
    // only the login VC's view to animate, with all underlying views
    // disappearing (invisibly) underneath at the same time. AFAICT, this is
    // what _should_ happen:
    //
    // > If you present several view controllers in succession, thus building
    // > a stack of presented view controllers, calling this method on a view
    // > controller lower in the stack dismisses its immediate child view
    // > controller and all view controllers above that child on the stack.
    // > When this happens, only the top-most view is dismissed in an animated
    // > fashion; any intermediate view controllers are simply removed from
    // > the stack.
    //
    // However, this is not what actually happens. To make it look right, we
    // basically fake out the same effect below, which only works here because
    // we know exactly what kind of context we'll have when the login screen
    // is dismissed.

    // Get an image snapshot of the login VC (including its navigation bar)
    UIGraphicsBeginImageContextWithOptions(self.presentedViewController.view.bounds.size, YES, 0);
    [self.presentedViewController.view drawViewHierarchyInRect:self.presentedViewController.view.bounds afterScreenUpdates:YES];
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    // Add it to our own view
    UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
    [self.view addSubview:imageView];

    // And hide our navigation bar, since the snapshot includes the login VC's own navigation bar
    [self.navigationController setNavigationBarHidden:YES animated:NO];

    // Then dismiss yourself
    [self.presentingViewController dismissViewControllerAnimated:YES completion:nil];
}

There is a stack of 2 modally presented view controllers, on top of my main view controller:

main VC -> compose VC -> login VC

When the login VC gets a tap on a “cancel” button, it sends a loginViewControllerDidClose message back to its delegate, which is the compose VC.

At which point the compose VC was just calling [self.presentingViewController dismissViewControllerAnimated:YES completion:nil]; This is meant to animate the stack of presented VCs away nicely, with the top-most VC’s view the one being animated away.

However, what I get is the login VC’s view disappearing immediately, without any animation, followed by the compose VC's view animating away.

This switching around of views before the animation occurs is a horrible look. What I want to happen is the login VC's view animating away, with all other views being sorted out invisibly.