---
title: CMLogItem
framework: coremotion
role: symbol
role_heading: Class
path: coremotion/cmlogitem
---

# CMLogItem

The base class for all motion-related data objects.

## Declaration

```swift
class CMLogItem
```

## Overview

Overview The CMLogItem class defines a read-only timestamp property that records the time a motion-event measurement was taken.

## Topics

### Getting the Time of the Event

- [timestamp](coremotion/cmlogitem/timestamp.md)

### Initializers

- [init(coder:)](coremotion/cmlogitem/init(coder:).md)

## Relationships

### Inherits From

- [NSObject](objectivec/nsobject-swift.class.md)

### Inherited By

- [CMAbsoluteAltitudeData](coremotion/cmabsolutealtitudedata.md)
- [CMAccelerometerData](coremotion/cmaccelerometerdata.md)
- [CMAltitudeData](coremotion/cmaltitudedata.md)
- [CMAmbientPressureData](coremotion/cmambientpressuredata.md)
- [CMDeviceMotion](coremotion/cmdevicemotion.md)
- [CMGyroData](coremotion/cmgyrodata.md)
- [CMHighFrequencyHeartRateData](coremotion/cmhighfrequencyheartratedata.md)
- [CMMagnetometerData](coremotion/cmmagnetometerdata.md)
- [CMMotionActivity](coremotion/cmmotionactivity.md)
- [CMRotationRateData](coremotion/cmrotationratedata.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSCoding](foundation/nscoding.md)
- [NSCopying](foundation/nscopying.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [NSSecureCoding](foundation/nssecurecoding.md)