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# UITimingCurveType

Constants indicating the type of timing information to use.

```
enum UITimingCurveType
```

## Topics

### Constants

[`UITimingCurveType.builtin`](/documentation/UIKit/UITimingCurveType/builtin)

Use the built-in UIKit timing curves. Specify this value when you want to use one of the constants in the [`UIView.AnimationCurve`](/documentation/UIKit/UIView/AnimationCurve) type. Specify the desired curve using the [`cubicTimingParameters`](/documentation/UIKit/UITimingCurveProvider/cubicTimingParameters) property.

[`UITimingCurveType.cubic`](/documentation/UIKit/UITimingCurveType/cubic)

Use a custom cubic Bézier curve. Specify the curve information using the [`cubicTimingParameters`](/documentation/UIKit/UITimingCurveProvider/cubicTimingParameters) property.

[`UITimingCurveType.spring`](/documentation/UIKit/UITimingCurveType/spring)

Use a custom spring animation. Specify the desired curve using the [`springTimingParameters`](/documentation/UIKit/UITimingCurveProvider/springTimingParameters) property.

[`UITimingCurveType.composed`](/documentation/UIKit/UITimingCurveType/composed)

Use a combination of timing parameters. This type of curve starts with the curve defined by the [`cubicTimingParameters`](/documentation/UIKit/UITimingCurveProvider/cubicTimingParameters) property and modifies it using the spring information in the [`springTimingParameters`](/documentation/UIKit/UITimingCurveProvider/springTimingParameters) property.


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