---
title: isMagnetometerActive
framework: coremotion
role: symbol
role_heading: Instance Property
path: coremotion/cmmotionmanager/ismagnetometeractive
---

# isMagnetometerActive

A Boolean value that determines whether magnetometer updates are currently happening.

## Declaration

```swift
var isMagnetometerActive: Bool { get }
```

## Discussion

Discussion This property indicates whether the startMagnetometerUpdates(to:withHandler:) or startMagnetometerUpdates() method has been called since the last time the stopMagnetometerUpdates() method was called. (If the start methods hadn’t been called, the app could be getting updates from the magnetometer after calling, for example, startDeviceMotionUpdates(), but this property would return false.)

## See Also

### Related Documentation

- [isMagnetometerAvailable](coremotion/cmmotionmanager/ismagnetometeravailable.md)

### Determining Which Services Are Active

- [isDeviceMotionActive](coremotion/cmmotionmanager/isdevicemotionactive.md)
- [isAccelerometerActive](coremotion/cmmotionmanager/isaccelerometeractive.md)
- [isGyroActive](coremotion/cmmotionmanager/isgyroactive.md)