CoreMotion Changes for Objective-C CoreMotion CMSensorRecorder.h Removed -[CMSensorRecorder accelerometerDataFrom:to:] Removed -[CMSensorRecorder accelerometerDataSince:] Removed -[CMSensorRecorder recordAccelerometerFor:] Added -[CMSensorRecorder accelerometerDataFromDate:toDate:] Added -[CMSensorRecorder recordAccelerometerForDuration:]