Wrong Frame Starting Center when Translucent is False

[alexookah]

When using navigation bar with Translucent = False the starting point of the animation is calculated wrong.

Check the following video:
https://streamable.com/gs9rn

Check my forked repo to reproduce:
https://github.com/Alexookah/BubbleTransition

changes:
i added a navigation controller as initial vc and changed the translucency in the navigation Bar.

[andreamazz]

The center is user provided, so you just need to adjust it like this:

  func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
    transition.transitionMode = .present
    transition.startingPoint = view.convert(transitionButton.center, to: nil)
    transition.bubbleColor = transitionButton.backgroundColor!
    return transition
  }
  
  func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
    transition.transitionMode = .dismiss
    transition.startingPoint = view.convert(transitionButton.center, to: nil)
    transition.bubbleColor = transitionButton.backgroundColor!
    return transition
  }

Notice the call to convert to get the absolute position.