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# dragInteraction(_:willAnimateLiftWith:session:)

Tells the delegate the system’s lift animation is about to start.

```
optional func dragInteraction(_ interaction: UIDragInteraction, willAnimateLiftWith animator: any UIDragAnimating, session: any UIDragSession)
```

## Parameters

`interaction`

The interaction that called this method.

`animator`

The animator that provides custom animations to run alongside the system’s lift animation. You can also use it to add a completion block that runs after the animations have finished.

`session`

The current drag session.

## Discussion

To add a custom animation block that runs during the lift animation, pass the block to the animator’s [`addAnimations(_:)`](/documentation/UIKit/UIDragAnimating/addAnimations(_:)) method.

To add a completion block that runs after the lift animation has finished, pass the block to the animator’s [`addCompletion(_:)`](/documentation/UIKit/UIDragAnimating/addCompletion(_:)) method.

---

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