---
title: "dragInteraction(_:willAnimateLiftWith:session:)"
framework: uikit
role: symbol
role_heading: Instance Method
path: "uikit/uidraginteractiondelegate/draginteraction(_:willanimateliftwith:session:)"
---

# dragInteraction(_:willAnimateLiftWith:session:)

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

## Declaration

```swift
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

Discussion To add a custom animation block that runs during the lift animation, pass the block to the animator’s addAnimations(_:) method. To add a completion block that runs after the lift animation has finished, pass the block to the animator’s addCompletion(_:) method.

## See Also

### Animating the drag behaviors

- [dragInteraction(_:item:willAnimateCancelWith:)](uikit/uidraginteractiondelegate/draginteraction(_:item:willanimatecancelwith:).md)