---
title: biasValues
framework: quartzcore
role: symbol
role_heading: Instance Property
path: quartzcore/cakeyframeanimation/biasvalues
---

# biasValues

An array of numbers that define the position of the curve relative to a control point.

## Declaration

```swift
var biasValues: [NSNumber]? { get set }
```

## Discussion

Discussion This property is an array of NSNumber objects, used only for the cubic calculation modes. Positive values move the curve before the control point while negative values move it after the control point. The first value defines the behavior of the tangent to the first control point, the second value controls the second point’s tangents, and so on. If you do not specify a value for a given control point, the value 0 is used.

## See Also

### Cubic Mode Attributes

- [tensionValues](quartzcore/cakeyframeanimation/tensionvalues.md)
- [continuityValues](quartzcore/cakeyframeanimation/continuityvalues.md)