Problem with BarButton.

From collection view I want open screen with menu. I use this code

```
// MARK: - UICollectionViewDelegate
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
let vc = createMenuView()
self.presentViewController(vc, animated: true, completion: nil)
}

// MARK: - Create menu
func createMenuView() -> SlideMenuController {

let mainViewController = kStoryboard.instantiateViewControllerWithIdentifier("TakeLesson") as! TakeLessonViewController
let leftViewController = kStoryboard.instantiateViewControllerWithIdentifier("LeftViewController") as! LeftViewController
let nvc: UINavigationController = UINavigationController(rootViewController: mainViewController)

leftViewController.mainViewController = nvc
let slideMenuController = SlideMenuController(mainViewController:nvc, leftMenuViewController: leftViewController)

return slideMenuController
}
```

But in menu view I in TakeLessonViewController in willViewAppear write self.setNavigationBarItem() but this don't work. I used this method in viewDidLoad but have negative effect with BarButton. He started in origin x = 0 and after got to normal position.

How can I fix that?

Best regards Oleksii

Start with createMenuView and TakeLessonViewController, then trace setNavigationBarItem from willViewAppear and viewDidLoad while reproducing the collection-view presentation. The work is done when the BarButton appears in its normal position without the initial x = 0 offset.

Written by the indexing model from the issue text.