---
title: AVCaptureSystemExposureBiasSlider
framework: avfoundation
role: symbol
role_heading: Class
path: avfoundation/avcapturesystemexposurebiasslider
---

# AVCaptureSystemExposureBiasSlider

A control that adjusts the exposure bias of a capture device within the system-recommended range.

## Declaration

```swift
class AVCaptureSystemExposureBiasSlider
```

## Mentioned in

Enhancing your app experience with the Camera Control

## Overview

Overview This control defines its range by querying the systemRecommendedExposureBiasRange property of the device’s active format. If a device’s activeFormat value changes, the slider updates its range with the new format’s system-recommended value. To use this control, add it to the capture session by calling the session’s addControl(_:) method.

## Topics

### Creating an exposure bias slider

- [init(device:)](avfoundation/avcapturesystemexposurebiasslider/init(device:).md)
- [init(device:action:)](avfoundation/avcapturesystemexposurebiasslider/init(device:action:).md)

## Relationships

### Inherits From

- [AVCaptureControl](avfoundation/avcapturecontrol.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)

## See Also

### Capture controls

- [Enhancing your app experience with the Camera Control](avfoundation/enhancing-your-app-experience-with-the-camera-control.md)
- [AVCaptureControl](avfoundation/avcapturecontrol.md)
- [AVCaptureSystemZoomSlider](avfoundation/avcapturesystemzoomslider.md)
- [AVCaptureSlider](avfoundation/avcaptureslider.md)
- [AVCaptureIndexPicker](avfoundation/avcaptureindexpicker.md)