Summary

At this point, you know all the mechanics of working with orientation, and with the accelerometer and gyroscope via Core Motion. You understand how to use the Core Motion motion manager (CMMotionManager) to take direct readings from the available sensors to interpret orientation, tilt, movement, and rotation of the device. You understand how to create an instance of CMMotionManager, how to tell the manager to start sending motion updates, and how to interpret the measurements that are provided.