protocol · iOS 13.4+ · SDK 27.1
@MainActor @preconcurrency protocol DropDelegateAn interface that you implement to interact with a drop operation in a view modified to accept drops. The ``DropDelegate`` protocol provides a comprehensive and flexible way to interact with a drop operation. Specify a drop delegate when you modify a view to accept drops with the ``View/onDrop(of:delegate:)`` method. Alternatively, for simple drop cases that don't require the full functionality of a drop delegate, you can modify a view to accept drops using the ``View/onDrop(of:isTargeted:perform:)`` method. This method handles the drop using a closure you provide as part of the modifier.
@MainActor @preconcurrency func validateDrop(info: DropInfo) -> BoolTells the delegate that a drop containing items conforming to one of the expected types entered a view that accepts drops. Specify the expected types when you apply the drop modifier to the view. The default implementation returns `true`.
@MainActor @preconcurrency func dropExited(info: DropInfo)Tells the delegate a validated drop operation has exited the modified view. The default implementation does nothing.
@MainActor @preconcurrency func dropEntered(info: DropInfo)Tells the delegate a validated drop has entered the modified view. The default implementation does nothing.
@MainActor @preconcurrency func dropUpdated(info: DropInfo) -> DropProposal?Tells the delegate that a validated drop moved inside the modified view. Use this method to return a drop proposal containing the operation the delegate intends to perform at the drop ``DropInfo/location``. The default implementation of this method returns `nil`, which tells the drop to use the last valid returned value or else ``DropOperation/copy``.
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