---
title: "init(perceptualDuration:bounce:)"
framework: quartzcore
role: symbol
role_heading: Initializer
path: "quartzcore/caspringanimation/init(perceptualduration:bounce:)"
---

# init(perceptualDuration:bounce:)

## Declaration

```swift
init(perceptualDuration: CFTimeInterval, bounce: CGFloat)
```