toursprung/TSMessages — pull request #66 by mRs- (2013-09-20 12:15:24+00:00)
Title: [Bugfix] in iOS 7 the notifications slipped under the UINavigationBar. I...

... fixed this issue here.

but what exactly is `[currentView.viewController isKindOfClass:[UINavigationController class]] ` doing here? This only happens when i am adding it directly to a UINavigationController.

Now you can push it to a ViewController and it will be checked if the ViewController has an UINavigationController parent.