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# DockAccessoryManager

Observe the state of dock accessories and enable or disable system tracking.

```
class DockAccessoryManager
```

## Overview

`DockAccessoryManager`  enables and disables system tracking for camera-enabled apps, and provides docking and undocking notifications.
If you want to customize the tracking behavior of a dock accessory, use [`accessoryStateChanges`](/documentation/DockKit/DockAccessoryManager/accessoryStateChanges) to obtain that accessory.

This class is a singleton, so use [`shared`](/documentation/DockKit/DockAccessoryManager/shared) to fetch the single instance.

## Topics

### Obtaining a manager

[`shared`](/documentation/DockKit/DockAccessoryManager/shared)

The accessory manager singleton object.

### Controlling dock accessories

[`accessoryStateChanges`](/documentation/DockKit/DockAccessoryManager/accessoryStateChanges)

Obtain a reference to a dock accessory and receive notifications about its state.

### Changing tracking behavior

[`isSystemTrackingEnabled`](/documentation/DockKit/DockAccessoryManager/isSystemTrackingEnabled)

An indication of whether system tracking is enabled.

[`setSystemTrackingEnabled(_:)`](/documentation/DockKit/DockAccessoryManager/setSystemTrackingEnabled(_:))

Enable and disable system tracking for camera-enabled apps.


---

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