---
title: discrete
framework: quartzcore
role: symbol
role_heading: Type Property
path: quartzcore/caanimationcalculationmode/discrete
---

# discrete

Each keyframe value is used in turn, no interpolated values are calculated.

## Declaration

```swift
static let discrete: CAAnimationCalculationMode
```

## Discussion

Discussion Keyframe animations based on discrete calculation interpolation require one less element in the values array than the keyTimes array. Each value / keyTime pair represents the value from the specified time until the next keyframe. For example, given the CAKeyframeAnimation created in the following code, the penultimate keyTime, 0.75, has a related value of 60. The value of position.y will remain at 60 until the animation completes. let keyframeAnimation = CAKeyframeAnimation(keyPath: "position.y") keyframeAnimation.calculationMode = kCAAnimationDiscrete    // keyframe 0: (0, 310), keyframe 1: (0.25, 60), keyframe 2: (0.5, 120), keyframe 3: (0.75, 60) keyframeAnimation.keyTimes = [0, 0.25, 0.5, 0.75, 1] keyframeAnimation.values = [310, 60, 120, 60] A layer animated with the keyframe animation created by the code above and with linearly interpolated horizontal movement would describe a path similar to the following figure.

## See Also

### Constants

- [linear](quartzcore/caanimationcalculationmode/linear.md)
- [paced](quartzcore/caanimationcalculationmode/paced.md)
- [cubic](quartzcore/caanimationcalculationmode/cubic.md)
- [cubicPaced](quartzcore/caanimationcalculationmode/cubicpaced.md)