Starts AR processing for the session with the specified configuration and options.
- iOS 11.0+
An object that defines motion and scene tracking behaviors for the session.
Options affecting how existing session state (if any) transitions to the new configuration.
If the session is running for the first time, this parameter has no effect.
Calling this method on a session that has already started transitions immediately to the new session configuration. The
options parameter determines how existing session state transitions to the new configuration. By default, the session resumes device position tracking from the last known state and keeps any anchors you've added the session. After you call this method, the session runs asynchronously.