---
title: lifetimeRange
framework: quartzcore
role: symbol
role_heading: Instance Property
path: quartzcore/caemittercell/lifetimerange
---

# lifetimeRange

The mean value by which the lifetime of the cell can vary. Animatable.

## Declaration

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

## Discussion

Discussion If the lifetimeRange is 3 seconds, and the lifetime of the cell is 10 seconds, the cell’s actual lifetime will be between 7 and 13 seconds. The default value of this property is 0.0.

## See Also

### Setting Emitter Cell Temporal Attributes

- [lifetime](quartzcore/caemittercell/lifetime.md)
- [birthRate](quartzcore/caemittercell/birthrate.md)
- [scaleSpeed](quartzcore/caemittercell/scalespeed.md)
- [velocity](quartzcore/caemittercell/velocity.md)
- [velocityRange](quartzcore/caemittercell/velocityrange.md)
- [xAcceleration](quartzcore/caemittercell/xacceleration.md)
- [yAcceleration](quartzcore/caemittercell/yacceleration.md)
- [zAcceleration](quartzcore/caemittercell/zacceleration.md)