---
title: frameRate
framework: appkit
role: symbol
role_heading: Instance Property
path: appkit/nsanimation/framerate
---

# frameRate

The number of frame updates per second to generate for the animation.

## Declaration

```swift
var frameRate: Float { get set }
```

## Discussion

Discussion The value of this property must be greater than or equal to 0. Specifying a value of 0.0 causes the animation to run as fast as possible. Setting the property to a negative value raises an exception. The frame rate is not guaranteed due to differences among systems for the time needed to process a frame. You can change the frame rate while an animation is running and the new value is used at the next frame. The default frame rate is set to a reasonable value (which is subject to future change).

## See Also

### Configuring an Animation

- [animationBlockingMode](appkit/nsanimation/animationblockingmode.md)
- [runLoopModesForAnimating](appkit/nsanimation/runloopmodesforanimating.md)
- [animationCurve](appkit/nsanimation/animationcurve.md)
- [duration](appkit/nsanimation/duration.md)