//First make the extension tu use enumerate in the for-in loopextension CMSensorDataList: SequenceType { public func generate() -> NSFastGenerator { return NSFastGenerator(self) }}//Now you can query the recorded datafunc printData(){ let date = NSDate() let recorder = CMSensorRecorder() let sensordata: CMSensorDataList = recorder.accelerometerDataFromDate(initialDate!, toDate: date)! for (index, data) in sensorData.enumerate() { print(index, data) }}
