---
title: isHighFrameRateTrackingEnabled
framework: visionkit
role: symbol
role_heading: Instance Property
path: visionkit/datascannerviewcontroller/ishighframeratetrackingenabled
---

# isHighFrameRateTrackingEnabled

A Boolean value that determines the frequency at which the scanner updates the geometry of recognized items.

## Declaration

```swift
@MainActor final let isHighFrameRateTrackingEnabled: Bool
```

## Discussion

Discussion If true, the scanner updates the geometry of items more frequently allowing your app to closely track recognized items. If you don’t track items in the live video, set this property to false. The default value is true.

## See Also

### Configuring data scanners

- [delegate](visionkit/datascannerviewcontroller/delegate.md)
- [qualityLevel](visionkit/datascannerviewcontroller/qualitylevel-swift.property.md)
- [DataScannerViewController.QualityLevel](visionkit/datascannerviewcontroller/qualitylevel-swift.enum.md)
- [recognizesMultipleItems](visionkit/datascannerviewcontroller/recognizesmultipleitems.md)
- [isPinchToZoomEnabled](visionkit/datascannerviewcontroller/ispinchtozoomenabled.md)
- [isGuidanceEnabled](visionkit/datascannerviewcontroller/isguidanceenabled.md)
- [isHighlightingEnabled](visionkit/datascannerviewcontroller/ishighlightingenabled.md)