---
title: NSAnimation.Curve.easeInOut
framework: appkit
role: symbol
role_heading: Case
path: appkit/nsanimation/curve/easeinout
---

# NSAnimation.Curve.easeInOut

Describes an S-curve in which the animation slowly speeds up and then slows down near the end of the animation. This constant is the default.

## Declaration

```swift
case easeInOut
```

## See Also

### Constants

- [NSAnimation.Curve.easeIn](appkit/nsanimation/curve/easein.md)
- [NSAnimation.Curve.easeOut](appkit/nsanimation/curve/easeout.md)
- [NSAnimation.Curve.linear](appkit/nsanimation/curve/linear.md)