Attempt to present UIViewController on UIViewController whose view is not in the window hierarchy

Question

Just started using Xcode 4.5 and I got this error in the console:

Warning: Attempt to present < finishViewController: 0x1e56e0a0 > on < ViewCont

Answer 1

Probably, like me, you have a wrong root viewController

I want to display a ViewController in a non-UIViewController context,

So I can't use such code:

[self presentViewController:]

So, I get a UIViewController:

[[[[UIApplication sharedApplication] delegate] window] rootViewController]

For some reason (logical bug), the rootViewController is something other than expected (a normal UIViewController). Then I correct the bug, replacing rootViewController with a UINavigationController, and the problem is gone.