Using -presentModalViewController:animated: with UITabBarController NOT animated

So the rootViewController for this application is a UITabBarController subclass. And we're having a bizarre issue where we cannot get a UITabBarController to -presentModalViewController:animated: if we're passing NO to animated. We've tried a variety of methods: -viewDidLoad, -viewWillAppear, -viewDidAppear and can only get it to work if we do it after a delay, which is hacky.

I decided to break this out into a test and found that if I have a UIViewController that calls -presentModalViewController:animated: in the开发者_开发技巧 -viewDidAppear method it works as expected with both YES and NO for the animated parameter. However if this VC is instead a UITabBarController, it works if animated is YES but not if it is NO.

Any ideas? Is this a bug? I've searched online and through documentation and can't find a reason that UITabBarController shouldn't be able to present a view this way.

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This definitely sounds like a bug. I'd suggest you file a bugreport with Apple. If it's blocking your project, you could submit it through one of your support incidents with Apple, and if they find it really is a bug they'll refund that support incident (so you don't loose anything). If it isn't a bug, they'll be able to give you a solution.