---
title: falloff
framework: uikit
role: symbol
role_heading: Instance Property
path: uikit/uifieldbehavior/falloff
---

# falloff

The rate of decay for the field strength.

## Declaration

```swift
var falloff: CGFloat { get set }
```

## Discussion

Discussion This property defines how quickly the field strength diminishes as the distance from the field’s center increases. Falloff is not applied until the distance between objects is greater than the value in the minimumRadius property. The default value of the property is 0, which yields a uniform field that does not diminish over distance.

## See Also

### Configuring the field attributes

- [position](uikit/uifieldbehavior/position.md)
- [region](uikit/uifieldbehavior/region.md)
- [strength](uikit/uifieldbehavior/strength.md)
- [minimumRadius](uikit/uifieldbehavior/minimumradius.md)
- [direction](uikit/uifieldbehavior/direction.md)
- [smoothness](uikit/uifieldbehavior/smoothness.md)
- [animationSpeed](uikit/uifieldbehavior/animationspeed.md)