---
title: exposureMode
framework: avfoundation
role: symbol
role_heading: Instance Property
path: avfoundation/avcapturedevice/exposuremode-swift.property
---

# exposureMode

The exposure mode for the device.

## Declaration

```swift
var exposureMode: AVCaptureDevice.ExposureMode { get set }
```

## Discussion

Discussion Before changing the value of this property, you must call lockForConfiguration() to acquire exclusive access to the device’s configuration properties. Otherwise, setting the value of this property raises an exception. When you’re done configuring the device, call unlockForConfiguration() to release the lock and allow other devices to configure the settings. This property is key-value observable.

## See Also

### Managing the exposure mode

- [isExposureModeSupported(_:)](avfoundation/avcapturedevice/isexposuremodesupported(_:).md)
- [AVCaptureDevice.ExposureMode](avfoundation/avcapturedevice/exposuremode-swift.enum.md)