---
title: completionSpeed
framework: uikit
role: symbol
role_heading: Instance Property
path: uikit/uiviewcontrollerinteractivetransitioning/completionspeed
---

# completionSpeed

Called when the system needs the speed at which to complete an interactive transition, after the interactive portion is finished.

## Declaration

```swift
optional var completionSpeed: CGFloat { get }
```

## Return Value

Return Value Default value is 1.0, which corresponds to the total (noninteractive) transition duration scaled by the percentage of the transition remaining. Value must be greater than 0.0.

## See Also

### Providing a transition’s completion characteristics

- [completionCurve](uikit/uiviewcontrollerinteractivetransitioning/completioncurve.md)