Tells the delegate that one or more anchors have been removed from the session.
- iOS 11.0+
The session providing information.
The anchors newly removed from the session.
Depending on the session configuration, ARKit may automatically remove anchors from a session.
If you display an AR experience using SceneKit or SpriteKit, you can instead implement one of the following methods instead to track not only the anchors in the session but also any corresponding SceneKit or SpriteKit content: