removeExistingAnchors
An option to remove any anchor objects associated with the session’s previous run.
Declaration
static var removeExistingAnchors: ARSession.RunOptions { get }Discussion
By default, when you call the run(_:options:) method on a session that has run before or is already running, the session keeps any ARAnchor objects that you previously added. That is, objects in the AR scene keep their apparent real-world positions relative to the device (unless you enable the resetTracking option).
Enable the removeExistingAnchors option if changing session configurations should invalidate the apparent real-world positions of objects in the AR scene. For example, if you’ve added virtual content to the AR scene whose positions are correlated to real-world objects, remove those anchors so you can reevaluate appropriate real-world positions. On the other hand, if the virtual content in your scene needs to track real-world positions only when that content first appears and can move freely thereafter, you can disable this option to keep the anchors.