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

# dragInteraction(_:session:willAdd:for:)

Tells the delegate an interaction is about to add items to a drag session.

## Declaration

```swift
optional func dragInteraction(_ interaction: UIDragInteraction, session: any UIDragSession, willAdd items: [UIDragItem], for addingInteraction: UIDragInteraction)
```

## Parameters

- `interaction`: The interaction that called this method.
- `session`: The current drag session.
- `items`: The drag items the interaction will add to the session.
- `addingInteraction`: The interaction adding the drag items.

## See Also

### Monitoring drag progress

- [dragInteraction(_:sessionWillBegin:)](uikit/uidraginteractiondelegate/draginteraction(_:sessionwillbegin:).md)
- [dragInteraction(_:sessionDidMove:)](uikit/uidraginteractiondelegate/draginteraction(_:sessiondidmove:).md)
- [dragInteraction(_:session:willEndWith:)](uikit/uidraginteractiondelegate/draginteraction(_:session:willendwith:).md)
- [dragInteraction(_:session:didEndWith:)](uikit/uidraginteractiondelegate/draginteraction(_:session:didendwith:).md)
- [dragInteraction(_:sessionDidTransferItems:)](uikit/uidraginteractiondelegate/draginteraction(_:sessiondidtransferitems:).md)