Call this method to stop the delivery of updates that you started by calling the startActivityUpdates(to:withHandler:) method. This method does not stop queries started using the queryActivityStarting(from:to:to:withHandler:) method.
A block that reports the current motion associated with the device.
This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.